ODM2 Controlled Vocabularies Login

Variable Name Vocabulary

A vocabulary for describing the name of Variables.

Term Name Definition
1_1_1_Trichloroethane 1,1,1-Trichloroethane 1,1,1-Trichloroethane (C2H3Cl3)
1_1_2_2_Tetrachloroethane 1,1,2,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane (C2H2Cl4)
1_1_2_Trichloroethane 1,1,2-Trichloroethane 1,1,2-Trichloroethane (C2H3Cl3)
1_1_Dichloroethane 1,1-Dichloroethane 1,1-Dichloroethane (C2H4Cl2)
1_1_Dichloroethene 1,1-Dichloroethene 1,1-Dichloroethene (C2H2Cl2)
1_2_3_Trimethylbenzene 1,2,3-Trimethylbenzene 1,2,3-Trimethylbenzene (C9H12)
1_2_4_5_Tetrachlorobenzene 1,2,4,5-tetrachlorobenzene 1,2,4,5-tetrachlorobenzene (C6H2Cl4)
1_2_4_Trichlorobenzene 1,2,4-Trichlorobenzene 1,2,4-Trichlorobenzene (C6H3Cl3)
1_2_4_Trimethylbenzene 1,2,4-Trimethylbenzene 1,2,4-Trimethylbenzene
1_2_Dibromo_3_Chloropropane 1,2-Dibromo-3-chloropropane 1,2-Dibromo-3-chloropropane (C3H5Br2Cl)
1_2_Dichlorobenzene 1,2-Dichlorobenzene 1,2-Dichlorobenzene (C6H4Cl2)
1_2_Dichloroethane 1,2-Dichloroethane 1,2-Dichloroethane (C2H4Cl2)
1_2_Dichloropropane 1,2-Dichloropropane 1,2-Dichloropropane (C3H6Cl2)
1_2_Dimethylnaphthalene 1,2-Dimethylnaphthalene 1,2-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_2_Dinitrobenzene 1,2-Dinitrobenzene 1,2-Dinitrobenzene (C6H4N2O4)
1_2_Diphenylhydrazine 1,2-Diphenylhydrazine 1,2-Diphenylhydrazine (C12H12N2)
1_3_5_Trimethylbenzene 1,3,5-Trimethylbenzene 1,3,5-Trimethylbenzene (C6H3(CH3)3)
1_3_Dichlorobenzene 1,3-Dichlorobenzene 1,3-Dichlorobenzene (C6H4Cl2)
1_3_Dimethyladamantane 1,3-Dimethyladamantane 1,3-Dimethyladamantane (C12H20).
1_3_Dimethylnaphthalene 1,3-Dimethylnaphthalene 1,3-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_3_Dinitrobenzene 1,3-Dinitrobenzene 1,3-Dinitrobenzene (C6H4N2O4)
1_4_5_8_Tetramethylnaphthalene 1,4,5,8-Tetramethylnaphthalene 1,4,5,8-Tetramethylnaphthalene (C14H16), a polycyclic aromatic hydrocarbon (PAH)
1_4_5_Trimethylnaphthalene 1,4,5-Trimethylnaphthalene 1,4,5-Trimethylnaphthalene (C10H5(CH3)3), a polycyclic aromatic hydrocarbon (PAH)
1_4_6_Trimethylnaphthalene 1,4,6-Trimethylnaphthalene 1,4,6-Trimethylnaphthalene (C10H5(CH3)3), a polycyclic aromatic hydrocarbon (PAH)
1_4_Dichlorobenzene 1,4-Dichlorobenzene 1,4-Dichlorobenzene (C6H4Cl2)
1_4_Dimethylnaphthalene 1,4-Dimethylnaphthalene 1,4-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_4_Dinitrobenzene 1,4-Dinitrobenzene 1,4-Dinitrobenzene (C6H4N2O4)
1_5_Dimethylnaphthalene 1,5-Dimethylnaphthalene 1,5-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_6_7_Trimethylnaphthalene 1,6,7-Trimethylnaphthalene 1,6,7-Trimethylnaphthalene (C10H5(CH3)3), a polycyclic aromatic hydrocarbon (PAH)
1_6_Dimethylnaphthalene 1,6-Dimethylnaphthalene 1,6-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_8_Dimethylnaphthalene 1,8-Dimethylnaphthalene 1,8-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
1_Chloronaphthalene 1-Chloronaphthalene 1-Chloronaphthalene (C10H7Cl)
1_Ethylnaphthalene 1-Ethylnaphthalene 1-Ethylnaphthalene (C10H7C2H5), a polycyclic aromatic hydrocarbon (PAH)
1_Methylanthracene 1-Methylanthracene 1-Methylanthracene (C15H12), a polycyclic aromatic hydrocarbon (PAH)
1_Methyldibenzothiophene 1-Methyldibenzothiophene 1-Methyldibenzothiophene (C13H10S)
1_Methylfluorene 1-Methylfluorene 1-Methylfluorene (C14H12), a polycyclic aromatic hydrocarbon (PAH)
1_Methylnaphthalene 1-Methylnaphthalene 1-Methylnaphthalene (C10H7CH3), a polycyclic aromatic hydrocarbon (PAH)
1_Methylphenanthrene 1-Methylphenanthrene 1-Methylphenanthrene (C15H12), a polycyclic aromatic hydrocarbon (PAH)
1_NaphthalenolMethylcarbamate 1-Naphthalenol methylcarbamate 1-Naphthalenol methylcarbamate (C12H11NO2)
19_Hexanoyloxyfucoxanthin 19-Hexanoyloxyfucoxanthin The phytoplankton pigment 19-Hexanoyloxyfucoxanthin
2_2_DichlorovinylDimethylPhosphate 2,2-dichlorovinyl dimethyl phosphate 2,2-dichlorovinyl dimethyl phosphate (C4H7Cl2O4P)
2_3_4_6_Tetrachlorophenol 2,3,4,6-Tetrachlorophenol 2,3,4,6-Tetrachlorophenol (C6H2Cl4O)
2_3_5_Trimethylnaphthalene 2,3,5-Trimethylnaphthalene 2,3,5-Trimethylnaphthalene (C13H14), a polycyclic aromatic hydrocarbon (PAH)
2_3_6_Trimethylnaphthalene 2,3,6-Trimethylnaphthalene 2,3,6-Trimethylnaphthalene (C10H5(CH3)3), a polycyclic aromatic hydrocarbon (PAH)
2_3_Dimethylnaphthalene 2,3-Dimethylnaphthalene 2,3-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
2_4_5_Trichlorophenol 2,4,5-Trichlorophenol 2,4,5-Trichlorophenol (C6H3Cl3O)
2_4_6_Trichlorophenol 2,4,6-Trichlorophenol 2,4,6-Trichlorophenol (TCP) (C6H2Cl3OH)
2_4_Dichlorophenol 2,4-Dichlorophenol 2,4-Dichlorophenol (C6H4Cl2O)
2_4_Dimethylphenol 2,4-Dimethylphenol 2,4-Dimethylphenol (C8H10O)
2_4_Dinitrophenol 2,4-Dinitrophenol 2,4-Dinitrophenol (C6H4N2O5)
2_4_Dinitrotoluene 2,4-Dinitrotoluene 2,4-Dinitrotoluene (C7H6N2O4)
2_6_Dichlorophenol 2,6-Dichlorophenol 2,6-Dichlorophenol (C6H4Cl2O)
2_6_Dinitrotoluene 2,6-Dinitrotoluene 2,6-Dinitrotoluene (C7H6N2O4)
2_7_Dimethylnaphthalene 2,7-Dimethylnaphthalene 2,7-Dimethylnaphthalene (C10H6(CH3)2), a polycyclic aromatic hydrocarbon (PAH)
2_Butanone_MEK 2-Butanone (MEK) 2-Butanone (MEK) (C4H8O)
2_Butoxyethanol 2-Butoxyethanol 2-Butoxyethanol (CH3(CH2)2CH2OCH2OH)
2_Chloronaphthalene 2-Chloronaphthalene 2-Chloronaphthalene (C10H7Cl)
2_Chlorophenol 2-Chlorophenol 2-Chlorophenol (C6H5ClO)
2_Hexanone 2-Hexanone 2-Hexanone (C6H12O)
2_Methylanthracene 2-Methylanthracene 2-Methylanthracene (C15H12), a polycyclic aromatic hydrocarbon (PAH)
2_Methyldibenzothiophene 2-Methyldibenzothiophene 2-Methyldibenzothiophene (C13H10S), a polycyclic aromatic hydrocarbon (PAH)
2_Methylnaphthalene 2-Methylnaphthalene 2-Methylnaphthalene (C10H7CH3), a polycyclic aromatic hydrocarbon (PAH)
2_Methylphenanthrene 2-Methylphenanthrene 2-Methylphenanthrene (C15H12), a polycyclic aromatic hydrocarbon (PAH)
2_Methylphenol 2-Methylphenol 2-Methylphenol (C7H8O)
2_Nitroaniline 2-Nitroaniline 2-Nitroaniline (C6H6N2O2)
2_Nitrophenol 2-Nitrophenol 2-Nitrophenol (C6H5NO3)
3_3_Dichlorobenzidine 3,3-Dichlorobenzidine 3,3-Dichlorobenzidine (C12H10Cl2N2)
3_6_Dimethylphenanthrene 3,6-Dimethylphenanthrene 3,6-Dimethylphenanthrene (C16H14), a polycyclic aromatic hydrocarbon (PAH)
3_Nitroaniline 3-Nitroaniline 3-Nitroaniline (C6H6N2O2)
4_4_DDD 4,4-DDD Dichlorodiphenyldichloroethane (C14H10Cl4)
4_4_DDE 4,4-DDE Dichlorodiphenyldichloroethylene (C14H8Cl4)
4_4_DDT 4,4-DDT Dichlorodiphenyltrichloroethane (C14H9Cl5)
4_4_Methylenebis_2_Chloroaniline 4,4-Methylenebis(2-chloroaniline) 4,4'-Methylenebis(2-chloroaniline) (C13H12Cl2N2)
4_4_Methylenebis_N_N_Dimethylaniline 4,4-Methylenebis(N,N-dimethylaniline) 4,4'-Methylenebis(N,N-dimethylaniline) (C17H22N2)
4_6_Dinitro_2_Methylphenol 4,6-Dinitro-2-methylphenol 4,6-Dinitro-2-methylphenol (C7H6N2O5)
4_BromophenylphenylEther 4-Bromophenylphenyl ether 4-Bromophenylphenyl ether (C12H9BrO)
4_Chloro_3_Methylphenol 4-Chloro-3-methylphenol 4-Chloro-3-methylphenol (C7H7ClO)
4_Chloroaniline 4-Chloroaniline 4-Chloroaniline (C6H6ClN)
4_ChlorophenylphenylEther 4-Chlorophenylphenyl ether 4-Chlorophenylphenyl ether (C12H9ClO)
4_Methylchrysene 4-Methylchrysene 4-Methylchrysene (C19H14), a polycyclic aromatic hydrocarbon (PAH)
4_Methyldibenzothiophene 4-Methyldibenzothiophene 4-Methyldibenzothiophene (C13H10S), a polycyclic aromatic hydrocarbon (PAH)
4_Methylphenol 4-Methylphenol 4-Methylphenol (C7H8O)
4_Nitroaniline 4-Nitroaniline 4-Nitroaniline (C6H6N2O2)
4_Nitrophenol 4-Nitrophenol 4-Nitrophenol (C6H5NO3)
9_cis_Neoxanthin 9 cis-Neoxanthin The phytoplankton pigment 9 cis-Neoxanthin
9_10_Dimethylanthracene 9,10-Dimethylanthracene 9,10-Dimethylanthracene (C16H14), a polycyclic aromatic hydrocarbon (PAH)
absorbance Absorbance The amount of radiation absorbed by a material
absorbanceUltraviolet Absorbance, ultraviolet Absorbance of ultraviolet light at a specified wavelength, typically at 254 or 280 nm for water samples. Not normalized to DOC concentration like variables such as SUVA280.
abundance Abundance The relative representation of a species in a particular ecosystem. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field.
acenaphthene Acenaphthene Acenaphthene (C12H10)
acenaphthylene Acenaphthylene Acenaphthylene (C12H8), a polycyclic aromatic hydrocarbon (PAH)
acetate Acetate Acetate
aceticAcid Acetic Acid Acetic Acid (C2H4O2)
acetone Acetone Acetone (C3H6O)
acetophenone Acetophenone Acetophenone (C6H5C(O)CH3)
acidNeutralizingCapacity Acid neutralizing capacity Acid neutralizing capacity
acidPhosphatase Acid phosphatase Phosphatase enzymes are used by soil microorganisms to access organically bound phosphate nutrients. An assay on the rates of activity of these enzymes may be used to ascertain biological demand for phosphates in the soil. Some plant roots, especially cluster roots, exude carboxylates that perform acid phosphatase activity, helping to mobilise phosphorus in nutrient-deficient soils.
acidityCO2Acidity Acidity, CO2 acidity CO2 acidity
acidityExchange Acidity, exchange The total amount of the Cation Exchange Capacity (CEC) of a soil that is due to H+ and Al3+ ions. It is a proportion of the total acidity and it is dependent on the type of soil and the percentage of the CEC that is composed of exchangeable bases (Ca2+, Mg2+, K+).
acidityHot Acidity, hot Hot Acidity
acidityMineralAcidity Acidity, mineral acidity Mineral Acidity
acidityTotalAcidity Acidity, total acidity Total acidity
activityAcidPhosphatase Activity, acid phosphatase Assay for microbial activity using acid phosphatase
activityBetaGlucosidase Activity, beta-glucosidase Assay for microbial activity using beta-glucosidase
activityBetaNAcetylGlucosaminidase Activity, beta-N-acetyl glucosaminidase Assay for microbial activity using beta-N-acetyl glucosaminidase
activityPhenolOxidase Activity, phenol oxidase Assay for microbial activity using phenol oxidase
adamantane Adamantane Adamantane (C10H16)
agencyCode Agency code Code for the agency which analyzed the sample
albedo Albedo The ratio of reflected to incident light.
albite Albite Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. As such it represents a plagioclase with less than 10% anorthite content.
aldrin Aldrin Aldrin (C12H8Cl6)
alkaliFeldspar Alkali feldspar The alkali feldspar group are those feldspar minerals rich in the alkali elements like potassium and sodium. The alkali feldspars include albite, anorthoclase, microcline, orthoclase and sanidine.
alkalinity Alkalinity Alkalinity is the capacity of water to resist changes in pH that would make the water more acidic. It should not be confused with basicity which is an absolute measurement on the pH scale. Alkalinity is the strength of a buffer solution composed of weak acids and their conjugate bases. It is measured by titrating the solution with a monoprotic acid such as HCl until its pH changes abruptly, or it reaches a known endpoint where that happens. Alkalinity is expressed in units of meq/L (milliequivalents per liter), which corresponds to the amount of monoprotic acid added as a titrant in millimoles per liter.
alkalinityBicarbonate Alkalinity, bicarbonate Bicarbonate Alkalinity
alkalinityCarbonate Alkalinity, carbonate Carbonate Alkalinity
alkalinityCarbonatePlusBicarbonate Alkalinity, carbonate plus bicarbonate Alkalinity, carbonate plus bicarbonate
alkalinityHydroxide Alkalinity, hydroxide Hydroxide Alkalinity
alkalinityTotal Alkalinity, total Total Alkalinity
alloxanthin Alloxanthin The phytoplankton pigment Alloxanthin
alluviumDepth Alluvium depth Alluvium is loose, unconsolidated (not cemented together into a solid rock) soil or sediment that has been eroded, reshaped by water in some form, and redeposited in a non-marine setting. Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. When this loose alluvial material is deposited or cemented into a lithological unit, or lithified, it is called an alluvial deposit.
alphaNAcetylglucosaminidase Alpha-N-Acetylglucosaminidase An enzyme with system name alpha-N-acetyl-D-glucosaminide N-acetylglucosaminohydrolase.[1][2][3][4] This enzyme catalyses the following chemical reaction: Hydrolysis of terminal non-reducing N-acetyl-D-glucosamine residues in N-acetyl-alpha-D-glucosaminides.
altitude Altitude Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage.
aluminum Aluminum Aluminium (in Commonwealth English) or Aluminum (in American English) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal.
aluminumDissolved Aluminum, dissolved Dissolved Aluminum (Al)
aluminumParticulate Aluminum, particulate Particulate aluminum in suspension
aluminumTotal Aluminum, total Aluminum (Al). Total indicates was measured on a whole water sample.
ammoniumFlux Ammonium flux Ammonium (NH4) flux
amphibole Amphibole Amphibole is an important group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures.
aniline Aniline Aniline (C6H7N)
anthracene Anthracene Anthracene (C14H10), a polycyclic aromatic hydrocarbon (PAH)
antimony Antimony Antimony is a chemical element with symbol Sb and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3).
antimonyDissolved Antimony, dissolved Dissolved antimony (Sb)."Dissolved" indicates measurement was on a filtered sample.
antimonyDistributionCoefficient Antimony, distribution coefficient Ratio of concentrations of antimony in two phases in equilibrium with each other. Phases must be specified.
antimonyParticulate Antimony, particulate Particulate antimony (Sb) in suspension
antimonyTotal Antimony, total Total antimony (Sb). "Total" indicates was measured on a whole water (unfiltered) sample.
apophyllite Apophyllite The name apophyllite refers to a specific group of phyllosilicates, a class of minerals. Originally, the group name referred to a specific mineral, but was redefined in 1978 to stand for a class of minerals of similar chemical makeup that comprise a solid solution series, and includes the members fluorapophyllite-(K), fluorapophyllite-(Na), hydroxyapophyllite-(K).
area Area Area of a measurement location
areaBasal Area, basal Basal area is the area of a given section of land that is occupied by the cross-section of tree trunks and stems at the base. The term is used in forest management and forest ecology.
argon Argon Argon
argonDissolved Argon, dissolved Dissolved Argon
aroclor_1016 Aroclor-1016 Aroclor-1016 (C24H13Cl7), a PCB mixture
aroclor_1242 Aroclor-1242 Aroclor-1242 (C12H6Cl4), a PCB mixture
aroclor_1254 Aroclor-1254 Aroclor-1254 (C12H5Cl5), a PCB mixture
aroclor_1260 Aroclor-1260 Aroclor-1260 (C12H3Cl7), a PCB mixture
arsenic Arsenic Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, but only the gray form, which has a metallic appearance, is important to industry.
arsenicDissolved Arsenic, dissolved Dissolved Arsenic. For chemical terms, dissolved represents a filtered sample.
arsenicDistributionCoefficient Arsenic, distribution coefficient Ratio of concentrations of arsenic in two phases in equilibrium with each other. Phases must be specified.
arsenicParticulate Arsenic, particulate Particulate arsenic (As) in suspension
arsenicTotal Arsenic, total Total arsenic (As). Total indicates was measured on a whole water sample.
aspect Aspect Aspect identifies the downslope direction of the maximum rate of change in value from each raster DEM cell to its neighbors.
asteridaeCoverage Asteridae coverage Areal coverage of the plant Asteridae
augelite Augelite Augelite is an aluminium phosphate mineral with formula: Al2(PO4)(OH)3. The shade varies from colorless to white, yellow or rose. Its crystal system is monoclinic
barium Barium Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. Its hydroxide, known in pre-modern times as baryta, does not occur as a mineral, but can be prepared by heating barium carbonate.
bariumDissolved Barium, dissolved Dissolved Barium (Ba)
bariumDistributionCoefficient Barium, distribution coefficient Ratio of concentrations of barium in two phases in equilibrium with each other. Phases must be specified
bariumParticulate Barium, particulate Particulate barium (Ba) in suspension
bariumTotal Barium, total Total Barium (Ba). For chemical terms, "total" indicates an unfiltered sample.
barometricPressure Barometric pressure Barometric pressure
baseSaturation Base saturation Percent base saturation (BS) is the percentage of the Cation Exchange Capacity (CEC) occupied by the basic cations Ca2+, Mg2+ and K+.
baseflow Baseflow The portion of streamflow (discharge) that is supplied by groundwater sources.
batisMaritimaCoverage Batis maritima Coverage Areal coverage of the plant Batis maritima
batteryTemperature Battery temperature The battery temperature of a datalogger or sensing system
batteryVoltage Battery voltage The battery voltage of a datalogger or sensing system, often recorded as an indicator of data reliability
bedrockType Bedrock type In geology, bedrock is the lithified rock that lies under a loose softer material called regolith at the surface of the Earth or other terrestrial planets.
benthos Benthos Benthic species
benz_a_anthracene Benz(a)anthracene Benz(a)anthracene (C18H12), a polycyclic aromatic hydrocarbon (PAH)
benzene Benzene Benzene (C6H6)
benzo_a_pyrene Benzo(a)pyrene Benzo(a)pyrene (C20H12), a polycyclic aromatic hydrocarbon (PAH)
benzo_b_fluoranthene Benzo(b)fluoranthene Benzo(b)fluoranthene (C20H12), a polycyclic aromatic hydrocarbon (PAH)
benzo_b_fluorene Benzo(b)fluorene Benzo(b)fluorene (C17H12), a polycyclic aromatic hydrocarbon (PAH)
benzo_e_pyrene Benzo(e)pyrene Benzo(e)pyrene (C20H12), a polycyclic aromatic hydrocarbon (PAH)
benzo_g_h_i_perylene Benzo(g,h,i)perylene Benzo(g,h,i)perylene (C22H12), a polycyclic aromatic hydrocarbon (PAH)
benzo_k_fluoranthene Benzo(k)fluoranthene Benzo(k)fluoranthene (C20H12), a polycyclic aromatic hydrocarbon (PAH)
benzoicAcid Benzoic acid Benzoic acid (C7H6O2)
benzylAlcohol Benzyl alcohol Benzyl alcohol (C7H8O)
beryllium Beryllium Beryllium is a chemical element with symbol Be and atomic number 4. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars beryllium is depleted as it is fused and creates larger elements. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl (aquamarine, emerald) and chrysoberyl. As a free element it is a steel-gray, strong, lightweight and brittle alkaline earth metal.
berylliumDissolved Beryllium, dissolved Dissolved Beryllium (Be) . For chemical terms, "dissolved"indicates a filtered sample.
berylliumTotal Beryllium, total Total Beryllium (Be). For chemical terms, "total" indicates an unfiltered sample.
berylium_10 Beryllium-10 Beryllium-10 (10Be) is a radioactive isotope of beryllium.
betaGlucosidase Beta-glucosidase Beta-glucosidase catalyzes the hydrolysis of the glycosidic bonds to terminal non-reducing residues in beta-D-glucosides and oligosaccharides, with release of glucose.
bicarbonate Bicarbonate Bicarbonate (HCO3-)
bifenthrin Bifenthrin Bifenthrin (C23H22ClF3O2)
biogenicSilica Biogenic silica Hydrated silica (SiO2 nH20)
biomass Biomass Mass of living biological organisms in a given area or ecosystem at a given time. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field.
biomassAboveGround Biomass, above-ground The biomass is the mass of living biological organisms in a given area or ecosystem at a given time on or above the surface of the ground
biomassMicrobial Biomass, microbial Microbial biomass (bacteria and fungi) is a measure of the mass of the living component of soil organic matter.
biomassPhytoplankton Biomass, phytoplankton Total mass of phytoplankton, per unit area or volume
biomassSoilBacterialDeoxyribonucleicAcid Biomass, soil bacterial deoxyribonucleic acid (DNA) Total dry mass of soil bacterial deoxyribonucleic acid (DNA) per unit mass of soil
biomassTotal Biomass, total Total biomass
biomassVegetation Biomass, vegetation Total dry mass of plant material per unit area or volume
biphenyl Biphenyl Biphenyl ((C6H5)2), a polycyclic aromatic hydrocarbon (PAH), also known as diphenyl or phenylbenzene or 1,1'-biphenyl or lemonene
bis_2_Chloroethoxy_Methane Bis(2-chloroethoxy)methane Bis(2-chloroethoxy)methane (C5H10Cl2O2)
bis_2_Chloroethyl_Ether bis(2-Chloroethyl)ether bis(2-Chloroethyl)ether (C4H8Cl2O)
bis_2_Ethylhexyl_Phthalate Bis-(2-ethylhexyl) phthalate Bis-(2-ethylhexyl) phthalate (C6H4(C8H17COO)2)
bis_2_ChloroisopropylEther bis-2-chloroisopropyl ether bis-2-chloroisopropyl ether (C6H12Cl2O)
bismuth Bismuth Bismuth is a chemical element with symbol Bi and atomic number 83. It is a pentavalent post-transition metal and one of the pnictogens with chemical properties resembling its lighter homologs arsenic and antimony. Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. The free element is 86% as dense as lead. It is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Bismuth is marginally radioactive, and the most naturally diamagnetic element, and has one of the lowest values of thermal conductivity among metals.
blue_GreenAlgae_Cyanobacteria_Phycocyanin Blue-green algae (cyanobacteria), phycocyanin Blue-green algae (cyanobacteria) with phycocyanin pigments
BOD1 BOD1 1-day Biochemical Oxygen Demand
BOD2Carbonaceous BOD2, carbonaceous 2-day Carbonaceous Biochemical Oxygen Demand
BOD20 BOD20 20-day Biochemical Oxygen Demand
BOD20Carbonaceous BOD20, carbonaceous 20-day Carbonaceous Biochemical Oxygen Demand
BOD20Nitrogenous BOD20, nitrogenous 20-day Nitrogenous Biochemical Oxygen Demand
BOD3Carbonaceous BOD3, carbonaceous 3-day Carbonaceous Biochemical Oxygen Demand
BOD4Carbonaceous BOD4, carbonaceous 4-day Carbonaceous Biological Oxygen Demand
BOD5 BOD5 5-day Biochemical Oxygen Demand
BOD5Carbonaceous BOD5, carbonaceous 5-day Carbonaceous Biochemical Oxygen Demand
BOD5Nitrogenous BOD5, nitrogenous 5-day Nitrogenous Biochemical Oxygen Demand
BOD6Carbonaceous BOD6, carbonaceous 6-day Carbonaceous Biological Oxygen Demand
BOD7Carbonaceous BOD7, carbonaceous 7-day Carbonaceous Biochemical Oxygen Demand
BODu BODu Ultimate Biochemical Oxygen Demand
BODuCarbonaceous BODu, carbonaceous Carbonaceous Ultimate Biochemical Oxygen Demand
BODuNitrogenous BODu, nitrogenous Nitrogenous Ultimate Biochemical Oxygen Demand
bodyLength Body length Length of the body of an organism
boreholeLogMaterialClassification Borehole log material classification Classification of material encountered by a driller at various depths during the drilling of a well and recorded in the borehole log.
boronDissolved Boron, dissolved dissolved boron
boronTotal Boron, total Total Boron (B)
borrichiaFrutescensCoverage Borrichia frutescens Coverage Areal coverage of the plant Borrichia frutescens
bromide Bromide A bromide is a chemical compound containing a bromide ion or ligand. This is a bromine atom with an ionic charge of −1 (Br−); for example, in caesium bromide, caesium cations (Cs+) are electrically attracted to bromide anions (Br−) to form the electrically neutral ionic compound CsBr. The term "bromide" can also refer to a bromine atom with an oxidation number of −1 in covalent compounds such as sulfur dibromide (SBr2).
bromideDissolved Bromide, dissolved Dissolved Bromide (Br-)
bromideTotal Bromide, total Total Bromide (Br-)
bromine Bromine Bromine (Br2)
bromineDissolved Bromine, dissolved Dissolved Bromine (Br2)
bromodichloromethane Bromodichloromethane Bromodichloromethane (CHBrCl2)
bromoform Bromoform Bromoform (CHBr3), a haloform
bromomethane_MethylBromide Bromomethane (Methyl bromide) Bromomethane (Methyl bromide) (CH3Br)
bulkDensity Bulk density The mass of many particles of the material divided by the total volume they occupy. The total volume includes particle volume, inter-particle void volume and internal pore volume.
bulkElectricalConductivity Bulk electrical conductivity Bulk electrical conductivity of a medium measured using a sensor such as time domain reflectometry (TDR), as a raw sensor response in the measurement of a quantity like soil moisture.
butane Butane Butane
butylbenzylphthalate Butylbenzylphthalate Butylbenzylphthalate (C19H20O4)
butyricAcid Butyric Acid Butyric Acid (C4H8O2)
cadmium Cadmium Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm).
cadmiumDissolved Cadmium, dissolved Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm).
cadmiumDissolved Cadmium, dissolved Dissolved Cadmium. For chemical terms, "dissolved" indicates a filtered sample.
cadmiumDistributionCoefficient Cadmium, distribution coefficient Ratio of concentrations of cadmium in two phases in equilibrium with each other. Phases must be specified.
cadmiumParticulate Cadmium, particulate Particulate cadmium (Cd) in suspension
cadmiumTotal Cadmium, total Total Cadmium (Cd). For chemical terms, "total" indciates an unfiltered sample.
calciumOxide Calcium oxide Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.
calciumDissolved Calcium, dissolved Calcium is a chemical element with symbol Ca and atomic number 20. An alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The name derives from Latin calx "lime", which was obtained from heating limestone.
calciumDissolved Calcium, dissolved Dissolved Calcium (Ca)
calciumTotal Calcium, total Total Calcium (Ca)
canopyClosure Canopy closure Crown closure is a term used in forestry. Crown closure and crown cover are two slightly different measures of the forest canopy and that determine the amount of light able to penetrate to the forest floor.
canopyHeight Canopy height Forest canopy density and height are used as variables in a number of environmental applications, such as biomass estimation, vegetation coverage, and biodiversity determination. Canopy density, or canopy cover, is the ratio of vegetation to ground as seen from the air. Canopy height measures how far above the ground the top of the canopy is. Lidar can be used to determine both of these variables.
canthaxanthin Canthaxanthin The phytoplankton pigment Canthaxanthin
carbaryl Carbaryl Carbaryl (C12H11NO2)
carbazole Carbazole Carbazole (C12H9N)
carbon Carbon Carbon is a chemical element with symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Three isotopes occur naturally, 12C and 13C being stable, while 14C is a radionuclide, decaying with a half-life of about 5,730 years. Carbon is one of the few elements known since antiquity.
carbonDioxide Carbon dioxide Carbon dioxide
carbonDioxideFlux Carbon dioxide flux Carbon dioxide (CO2) flux
carbonDioxideStorageFlux Carbon dioxide storage flux Carbon dioxide (CO2) storage flux
carbonDioxideDissolved Carbon Dioxide, dissolved Dissolved Carbon dioxide (CO2)
carbonDioxideTransducerSignal Carbon dioxide, transducer signal Carbon dioxide (CO2), raw data from sensor
carbonDisulfide Carbon disulfide Carbon disulfide (CS2)
carbonMonoxideDissolved Carbon monoxide, dissolved Dissolved carbon monoxide (CO)
carbonTetrachloride Carbon tetrachloride Carbon tetrachloride (CCl4)
carbonToNitrogenMassRatio Carbon to nitrogen mass ratio Carbon to nitrogen (C:N) mass ratio
carbonToNitrogenMolarRatio Carbon to nitrogen molar ratio Carbon to nitrogen (C:N) molar ratio
carbonDissolvedInorganic Carbon, dissolved inorganic Dissolved Inorganic Carbon
carbonDissolvedOrganic Carbon, dissolved organic Dissolved Organic Carbon
carbonDissolvedTotal Carbon, dissolved total Dissolved Total (Organic+Inorganic) Carbon
carbonOrganicExtractable Carbon, organic extractable Mass of carbon extractable by water from soil or forest floor samples, also known as water-extractable organic carbon (WEOC)
carbonParticulateOrganic Carbon, particulate organic Particulate organic carbon in suspension
carbonSuspendedInorganic Carbon, suspended inorganic Suspended Inorganic Carbon
carbonSuspendedOrganic Carbon, suspended organic DEPRECATED -- The use of this term is discouraged in favor of the use of the synonymous term "Carbon, particulate organic".
carbonSuspendedTotal Carbon, suspended total Suspended Total (Organic+Inorganic) Carbon
carbonTotal Carbon, total Total (Dissolved+Particulate) Carbon
carbonTotalInorganic Carbon, total inorganic Total (Dissolved+Particulate) Inorganic Carbon
carbonTotalOrganic Carbon, total organic Total (Dissolved+Particulate) Organic Carbon
carbonTotalSolidPhase Carbon, total solid phase Total solid phase carbon
carbon_13StableIsotopeRatioDelta Carbon-13, stable isotope ratio delta Difference in the 13C:12C ratio between the sample and standard (del C 13)
carbon_14 Carbon-14 A radioactive isotope of carbon which undergoes beta decay
carbonate Carbonate Carbonate ion (CO3-2) concentration
cationExchangeCapacity Cation exchange capacity (CEC) Cation exchange capacity (CEC) is a measure of the total negative charges within the soil that adsorb plant nutrient cations such as calcium (Ca2+), magnesium (Mg2+) and potassium (K+). As such, the CEC is a property of a soil that describes its capacity to supply nutrient cations to the soil solution for plant uptake.
cellobiohydrolase Cellobiohydrolase Exocellulases or cellobiohydrolases cleave two to four units from the ends of the exposed chains produced by endocellulase, resulting in tetrasaccharides or disaccharides, such as cellobiose. Exocellulases are further classified into type I, that work processively from the reducing end of the cellulose chain, and type II, that work processively from the nonreducing end.
cerium Cerium Cerium is a chemical element with symbol Ce and atomic number 58. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife.
ceriumDissolved Cerium, dissolved Dissolved Cerium (Ce). "Dissolved " indicates a the measurement was made on a filtered sample.
cesium Cesium Caesium (IUPAC spelling) or cesium (American spelling) is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature.
cesiumDissolved Cesium, dissolved Dissolved Cesium (Cs)
cesiumTotal Cesium, total Total Cesium (Cs)
cesium_137 Cesium-137 A radioactive isotope of cesium which is formed as a fission product by nuclear fission of uranium or plutonium.
chloride Chloride Chloride (Cl-)
chlorideDissolved Chloride, dissolved Dissolved Chloride (Cl-)
chlorideTotal Chloride, total Total Chloride (Cl-)
chlorine Chlorine Chlorine (Cl2)
chlorineDissolved Chlorine, dissolved Dissolved Chlorine (Cl2)
chlorobenzene Chlorobenzene Chlorobenzene (C6H5Cl)
chlorobenzilate Chlorobenzilate Chlorobenzilate (C16H14Cl2O3)
chloroethane Chloroethane Chloroethane (C2H5Cl)
chloroethene Chloroethene Chloroethene (C2H3Cl)
chloroform Chloroform Chloroform (CHCl3), a haloform
chloromethane Chloromethane Chloromethane (CH3Cl)
chlorophyll_a_b_c Chlorophyll (a+b+c) Chlorophyll (a+b+c)
chlorophyll_a Chlorophyll a Chlorophyll a
chlorophyll_a_Allomer Chlorophyll a allomer The phytoplankton pigment Chlorophyll a allomer
chlorophyll_a_CorrectedForPheophytin Chlorophyll a, corrected for pheophytin Chlorphyll a corrected for pheophytin
chlorophyll_a_UncorrectedForPheophytin Chlorophyll a, uncorrected for pheophytin Chlorophyll a uncorrected for pheophytin
chlorophyll_b Chlorophyll b Chlorophyll b
chlorophyll_c Chlorophyll c Chlorophyll c
chlorophyll_c1_And_c2 Chlorophyll c1 and c2 Chlorophyll c1 and c2
chlorophyllFluorescence Chlorophyll fluorescence Chlorophyll Fluorescence
chromium Chromium Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard and brittle transition metal. Chromium boasts a high usage rate as a metal that is able to be highly polished while resisting tarnishing. Chromium is also the main component of stainless steel, a popular steel alloy due to its uncommonly high specular reflection. Simple polished chromium reflects almost 70% of the visible spectrum, with almost 90% of infrared light waves being reflected. The name of the element is derived from the Greek word χρῶμα, chrōma, meaning color, because many chromium compounds are intensely colored.
chromium_III Chromium (III) Trivalent Chromium
chromium_VI Chromium (VI) Hexavalent Chromium
chromium_VI_Dissolved Chromium (VI), dissolved Dissolved Hexavalent Chromium
chromiumDissolved Chromium, dissolved Dissolved Chromium
chromiumDistributionCoefficient Chromium, distribution coefficient Ratio of concentrations of chromium in two phases in equilibrium with each other. Phases must be specified.
chromiumParticulate Chromium, particulate Particulate chromium (Cr) in suspension
chromiumTotal Chromium, total Total chromium (Cr). Total indicates was measured on a whole water (unfiltered) sample.
chrysene Chrysene Chrysene (C18H12), a polycyclic aromatic hydrocarbon (PAH)
circumference Circumference In geometry, the circumference (from Latin circumferens, meaning "carrying around") of a circle is the (linear) distance around it. That is, the circumference would be the length of the circle if it were opened up and straightened out to a line segment. Since a circle is the edge (boundary) of a disk, circumference is a special case of perimeter. The perimeter is the length around any closed figure and is the term used for most figures excepting the circle and some circular-like figures such as ellipses. Informally, "circumference" may also refer to the edge itself rather than to the length of the edge.
cis_1_2_Dichloroethene cis-1,2-Dichloroethene cis-1,2-Dichloroethene (C2H2Cl2)
cis_1_3_Dichloropropene cis-1,3-Dichloropropene cis-1,3-Dichloropropene (C3H4Cl2)
Clay Clay USDA particle size distribution category. Less then 0.002 mm diameter fine earth particles.
clinoptilolite Clinoptilolite Clinoptilolite is a natural zeolite comprising a microporous arrangement of silica and alumina tetrahedra. It has the complex formula: (Na,K,Ca)2-3Al3(Al,Si)2Si13O36·12H2O.
cloudCover Cloud cover Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds when observed from a particular location.
cobalt Cobalt Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
cobaltDissolved Cobalt, dissolved Dissolved Cobalt (Co)
cobaltTotal Cobalt, total Total Cobalt (Co)
cobalt_60 Cobalt-60 A synthetic radioactive isotope of cobalt with a half-life of 5.27 years.
COD COD Chemical oxygen demand
coliformFecal Coliform, fecal Fecal Coliform
coliformTotal Coliform, total Total Coliform
color Color Color in quantified in color units
coloredDissolvedOrganicMatter Colored dissolved organic matter The concentration of colored dissolved organic matter (humic substances)
containerNumber Container number The identifying number for a water sampler container.
copper Copper Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement.
copperDissolved Copper, dissolved Dissolved Copper (Cu)
copperDistributionCoefficient Copper, distribution coefficient Ratio of concentrations of copper in two phases in equilibrium with each other. Phases must be specified.
copperParticulate Copper, particulate Particulate copper (Cu) in suspension
copperTotal Copper, total Total copper (Cu). "Total" indicates was measured on a whole water (unfiltered) sample.
countAreal Count, areal Counts per area
counter Counter The total number of events within the measurement period
cristobalite Cristobalite The mineral cristobalite is a high-temperature polymorph of silica, meaning that it has the same chemical formula as quartz, SiO2, but a distinct crystal structure.
cryptophytes Cryptophytes The chlorophyll a concentration contributed by cryptophytes
curvature Curvature Curvature of a DEM measures the shape or curvature of the slope. A part of a surface can be concave or convex; you can tell that by looking at the curvature value. The curvature is calculated by computing the second derivative of the surface.
cuscutaSppCoverage Cuscuta spp. coverage Areal coverage of the plant Cuscuta spp.
cyanide Cyanide Cyanide (CN)
cyclohexane Cyclohexane Cyclohexane (C6H6Cl6)
cytochromeP450Family1SubfamilyAPolypeptide1DeltaCycleThreshold Cytochrome P450, family 1, subfamily A, polypeptide 1, delta cycle threshold Delta cycle threshold for Cytochrome P450, family 1, subfamily A, polypeptide 1 (cyp1a1). Cycle threshold is the PCR cycle number at which the fluorescent signal of the gene being amplified crosses the set threshold. Delta cycle threshold for cyp1a1 is the difference between the cycle threshold (Ct) of cyp1a1 gene expression and the cycle threshold (Ct) for the gene expression of the reference gene (e.g., beta-actin).
cytosolicProtein Cytosolic protein The total protein concentration within the cytosolic fraction of cells. The cytosol refers to the intracellular fluid or cytoplasmic matrix of a eukaryotic cell.
d_Limonene d-Limonene d-Limonene (C10H16)
dataShuttleAttached Data shuttle attached A categorical variable marking the attachment of a coupler or data shuttle to a logger. This is used for quality control.
dataShuttleDetached Data shuttle detached A categorical variable marking the detatchment of a coupler or data shuttle to a logger. This is used for quality control.
delta_13COfC2H6 delta-13C of C2H6 Isotope 13C of ethane
delta_13COfC3H8 delta-13C of C3H8 Isotope 13C of propane
delta_13COfC4H10 delta-13C of C4H10 Isotope 13C of butane
delta_13COfCH4 delta-13C of CH4 Isotope 13C of methane
delta_13COfCO2 delta-13C of CO2 Isotope 13C of carbon dioxide
delta_13COfDIC delta-13C of DIC Isotope 13C of dissolved inorganic carbon (DIC)
delta_18OOfH2O delta-18O of H2O Isotope 18O of water
delta_DOfCH4 delta-D of CH4 hydrogen isotopes of methane
delta_DOfH2O delta-D of H2O hydrogen isotopes of water
density Density Density
depth Depth The perpendicular measurement downward from a surface
depthSnow Depth, snow Depth of snow
soilDepth Depth, soil Depth of soil
depthUnsaturatedZone Depth, unsaturated zone Depth of the Unsaturated zone. The vadose zone, also termed the unsaturated zone, is the part of Earth between the land surface and the top of the phreatic zone, the position at which the groundwater (the water in the soil's pores) is at atmospheric pressure ("vadose" is from the Latin for "shallow"). Hence, the vadose zone extends from the top of the ground surface to the water table.
deuterium Deuterium Deuterium (2H), Delta D
di_n_Butylphthalate Di-n-butylphthalate Di-n-butylphthalate (C16H22O4)
di_n_OctylPhthalate Di-n-octyl phthalate Di-n-octyl phthalate (C24H38O4)
diadinoxanthin Diadinoxanthin The phytoplankton pigment Diadinoxanthin
diallate_CisOrTrans Diallate (cis or trans) Diallate (cis or trans) (C10H17Cl2NOS)
diameter Diameter A diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter (which refers to the line itself), because all diameters of a circle or sphere have the same length, this being twice the radius r.
diameterAtBreastHeight Diameter at breast height (DBH) Diameter at breast height, or DBH, is the standard for measuring trees. DBH refers to the tree diameter measured at 4.5 feet above the ground.
diatoxanthin Diatoxanthin The phytoplankton pigment Diatoxanthin
dibenz_a_h_anthracene Dibenz(a,h)anthracene Dibenz(a,h)anthracene (C22H14), a polycyclic aromatic hydrocarbon (PAH)
dibenzofuran Dibenzofuran Dibenzofuran (C12H8O)
dibenzothiophene Dibenzothiophene Dibenzothiophene (C12H8S), a polycyclic aromatic hydrocarbon (PAH)
dibromochloromethane Dibromochloromethane Dibromochloromethane (CHBr2Cl)
dieldrin Dieldrin Dieldrin (C12H8Cl6O)
dielectricConstant Dielectric constant The relative permittivity of a material is its (absolute) permittivity expressed as a ratio relative to the permittivity of vacuum. Permittivity is a material property that affects the Coulomb force between two point charges in the material. Relative permittivity is the factor by which the electric field between the charges is decreased relative to vacuum. Likewise, relative permittivity is the ratio of the capacitance of a capacitor using that material as a dielectric, compared with a similar capacitor that has vacuum as its dielectric. Relative permittivity is also commonly known as dielectric constant, a term deprecated in engineering as well as in chemistry.
diethylPhthalate Diethyl phthalate Diethyl phthalate (C12H14O4)
diethyleneGlycol Diethylene glycol Diethylene glycol (C4H10O3)
diffractionXRay Diffraction, X-ray (XRD) X-ray crystallography (XRC) is a technique used for determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions.
diisopropylEther Diisopropyl Ether Diisopropyl Ether (C6H14O)
dimethylPhthalate Dimethyl Phthalate Dimethyl Phthalate (C10H10O4)
dimethylphenanthrene Dimethylphenanthrene Dimethylphenanthrene (C16H14)
dinoflagellates Dinoflagellates The chlorophyll a concentration contributed by Dinoflagellates
dinoseb Dinoseb Dinoseb (C10H12N2O5)
discharge Discharge Discharge
distance Distance Distance measured from a sensor to a target object such as the surface of a water body or snow surface.
distichlisSpicataCoverage Distichlis spicata Coverage Areal coverage of the plant Distichlis spicata
disulfoton Disulfoton Disulfoton (C8H19O2PS3)
DNADamageOliveDailMoment DNA damage, olive tail moment In a single cell gel electrophoresis assay (comet assay), olive tail moment is the product of the percentage of DNA in the tail and the distance between the intesity centroids of the head and tail along the x-axis (Olive, et al., 1990)
DNADamagePercentTailDNA DNA damage, percent tail DNA In a single cell gel electrophoresis assay (comet assay), percent tail DNA is the ratio of fluorescent intensity of the tail over the total fluorescent intensity of the head (nuclear core) and tail multiplied by 100.
DNADamageTailLength DNA damage, tail length In a single cell gel electrophoresis assay (comet assay), tail length is the distance of DNA migration from the body of the nuclear core
dysprosium Dysprosium Dysprosium is a chemical element with symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime. Naturally occurring dysprosium is composed of seven isotopes, the most abundant of which is 164Dy.
dysprosiumDissolved Dysprosium, dissolved Dissolved dysprosium (Dy). "Dissolved " indicates a the measurement was made on a filtered sample.
e_coli E-coli Escherichia coli
effectiveEnergyAndMassTransfer Effective energy and mass transfer (EEMT) Effective energy and mass transfer (EEMT) couples energy and mass flux to the subsurface in the form of effective precipitation and net primary production in a common energy unit.
electricCurrent Electric Current A flow of electric charge
electricEnergy Electric Energy Electric Energy
electricPower Electric Power Electric Power
electricalConductivity Electrical conductivity Electrical conductivity
endOfFile End of file A categorical variable marking the end of a data file. This is used for quality control.
endosulfan_I_Alpha Endosulfan I (alpha) Endosulfan I (alpha) (C9H6Cl6O3S)
endosulfan_II_Beta Endosulfan II (beta) Endosulfan II (beta) (C9H6Cl6O3S)
endosulfanSulfate Endosulfan Sulfate Endosulfan Sulfate (C9H6Cl6O4S)
endrin Endrin Endrin (C12H8Cl6O)
endrinAldehyde Endrin aldehyde Endrin aldehyde (C12H8Cl6O)
endrinKetone Endrin Ketone Endrin Ketone (C12H9Cl5O)
enterococci Enterococci Enterococcal bacteria
erbium Erbium Erbium is a chemical element with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden, from which it got its name.
erbiumDissolved Erbium, dissolved Dissolved Erbium (Er). "Dissolved " indicates a the measurement was made on a filtered sample.
erosionRate Erosion rate In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location (not to be confused with weathering which involves no movement).
ethane Ethane Ethane
ethaneDissolved Ethane, dissolved Dissolved Ethane (C2H6)
ethanol Ethanol Ethanol (C2H6O)
ethoxyresorufin_O_DeethylaseActivity Ethoxyresorufin O-deethylase, activity Ethoxyresorufin O-deethylase (EROD) activity
ethylTert_ButylEther Ethyl tert-Butyl Ether Ethyl tert-Butyl Ether (C6H14O)
ethylbenzene Ethylbenzene Ethylbenzene (C8H10)
ethylene Ethylene Ethylene (C2H4)
ethyleneGlycol Ethylene glycol Ethlene Glycol (C2H4(OH)2)
ethyleneDissolved Ethylene, dissolved Dissolved ethylene
ethyne Ethyne Ethyne (C2H2)
europium Europium Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.
europiumDissolved Europium, dissolved Dissolved Europium (Eu). "Dissolved " indicates a the measurement was made on a filtered sample.
evaporation Evaporation Evaporation
evapotranspiration Evapotranspiration Evapotranspiration
evapotranspiration Evapotranspiration (ET) Evapotranspiration (ET) is the sum of evaporation and plant transpiration from the Earth's land and ocean surface to the atmosphere.
evapotranspirationPotential Evapotranspiration, potential The amount of water that could be evaporated and transpired if there was sufficient water available.
extracellularEnzymeActivity Extracellular enzyme activity Extracellular enzymes or exoenzymes are synthesized inside the cell and then secreted outside the cell, where their function is to break down complex macromolecules into smaller units to be taken up by the cell for growth and assimilation.
fishDetections Fish detections The number of fish identified by the detection equipment
flashMemoryErrorCount Flash memory error count A counter which counts the number of datalogger flash memory errors
fluoranthene Fluoranthene Fluoranthene (C16H10), a polycyclic aromatic hydrocarbon (PAH)
fluorene Fluorene Fluorene (C13H10), a polycyclic aromatic hydrocarbon (PAH)
fluorescenceIndex Fluorescence index Fluorescence index for measuring fluorescent dissolved organic matter (FDOM). Ratio of emission intensity at 470nm to intensity at 520nm at excitation 370nm.
fluorescenceDissolvedOrganicCarbon Fluorescence, dissolved organic carbon (DOC) Fluorescence of dissolved organic carbon (DOC). DOC is an element specific fraction of dissolved organic matter (DOM).
fluorescenceDissolvedOrganicMatter Fluorescence, dissolved organic matter (DOM) Fluorescence of dissolved organic matter (DOM).
fluorescenceXRay Fluorescence, X-ray (XRF) X-ray fluorescence (XRF) is the emission of characteristic "secondary" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays.
fluoride Fluoride Fluoride (F-)
fluorideDissolved Fluoride, dissolved Dissolved Fluoride (F-)
fluorine Fluorine Fluorine (F2)
fluorineDissolved Fluorine, dissolved Dissolved Fluorine (F2)
formate Formate Formate
formicAcid Formic acid Formic acid (CH2O2)
frequencyOfRotation Frequency of Rotation Number of rotations within a time period
frictionVelocity Friction velocity Friction velocity
gadolinium Gadolinium Gadolinium is a chemical element with symbol Gd and atomic number 64. Gadolinium is a silvery-white, malleable, and ductile rare earth metal. It is found in nature only in oxidized form, and even when separated, it usually has impurities of the other rare earths.
gadoliniumDissolved Gadolinium, dissolved Dissolved Gadolinium (Gd). "Dissolved " indicates a the measurement was made on a filtered sample.
gageHeight Gage height Water level with regard to an arbitrary gage datum (also see Water depth for comparison)
gallium Gallium Gallium is a chemical element with symbol Ga and atomic number 31. It is in group 13 of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and thallium.
gammaCounts Gamma counts The radioactivity of rocks has been used for many years to help derive lithologies. Natural occurring radioactive materials (NORM) include the elements uranium, thorium, potassium, radium, and radon, along with the minerals that contain them. There is usually no fundamental connection between different rock types and measured gamma ray intensity, but there exists a strong general correlation between the radioactive isotope content and mineralogy. Logging tools have been developed to read the gamma rays emitted by these elements and interpret lithology from the information collected.
geologicUnit Geologic unit Geologic units consists primarily of identifying physiographic units and determining the rock lithology or coarse stratigraphy of exposed units.
germanium Germanium Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.
germaniumDissolved Germanium, dissolved Dissolved Germanium (Ge). "Dissolved " indicates a the measurement was made on a filtered sample.
gibbsite Gibbsite Gibbsite, Al(OH)3, is one of the mineral forms of aluminium hydroxide. It is often designated as γ-Al(OH)3 (but sometimes as α-Al(OH)3.[1]). It is also sometimes called hydrargillite (or hydrargyllite).
globalRadiation Global Radiation Solar radiation, direct and diffuse, received from a solid angle of 2p steradians on a horizontal surface. Source: World Meteorological Organization, Meteoterm
glucosidase Glucosidase Glucosidases are glycoside hydrolase enzymes categorized under the EC number 3.2.1.
glutaraldehyde Glutaraldehyde Glutaraldehyde (C5H8O2)
glutathione_S_TransferaseActivity Glutathione S-transferase, activity Glutathione S-transferase (GST) activity
glutathione_S_TransferaseDeltaCycleThreshold Glutathione S-transferase, delta cycle threshold Delta cycle threshold for glutathione S-transferase (gst). Cycle threshold is the PCR cycle number at which the fluorescent signal of the gene being amplified crosses the set threshold. Delta cycle threshold for gst is the difference between the cycle threshold (Ct) of gst gene expression and the cycle threshold (Ct) for the gene expression of the reference gene (e.g., beta-actin).
goethite Goethite Goethite, FeO(OH), is an iron-bearing hydroxide mineral of the diaspore group. It is found in soil and other low-temperature environments.
grainSize Grain size Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials.
grossAlphaRadionuclides Gross alpha radionuclides Gross Alpha Radionuclides
grossBetaRadionuclides Gross beta radionuclides Gross Beta Radionuclides
groundHeatFlux Ground heat flux Ground heat flux
groundwaterDepth Groundwater Depth Groundwater depth is the distance between the water surface and the ground surface at a specific location specified by the site location and offset.
hafnium Hafnium Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals.
hail Hail Hail is a form of solid precipitation. It is distinct from ice pellets (American English "sleet"), though the two are often confused. It consists of balls or irregular lumps of ice, each of which is called a hailstone.
halloysite Halloysite Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are aluminium (20.90%), silicon (21.76%) and hydrogen (1.56%).
hardnessCalcium Hardness, Calcium Hardness of calcium
hardnessCarbonate Hardness, carbonate Carbonate hardness also known as temporary hardness
hardnessMagnesium Hardness, Magnesium Hardness of magnesium
hardnessNonCarbonate Hardness, non-carbonate Non-carbonate hardness
hardnessTotal Hardness, total Total hardness
heatIndex Heat index The combination effect of heat and humidity on the temperature felt by people.
height Height Height is measure of vertical distance, either vertical extent or vertical position
heightAboveSeaFloor height, above sea floor Vertical distance from the sea floor to a point.
helium Helium Helium
heliumDissolved Helium, dissolved Dissolved Helium (He)
heptachlor Heptachlor Heptachlor (C10H5Cl7)
heptachlorEpoxide Heptachlor epoxide Heptachlor epoxide (C10H5Cl7O)
hexachlorobenzene Hexachlorobenzene Hexachlorobenzene (C6Cl6)
hexachlorobutadiene Hexachlorobutadiene Hexachlorobutadiene (C4Cl6)
hexachlorocyclopentadiene Hexachlorocyclopentadiene Hexachlorocyclopentadiene (C5Cl6)
hexachloroethane Hexachloroethane Hexachloroethane (C2Cl6)
hexane Hexane Hexane
holmium Holmium Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve.
holmiumDissolved Holmium, dissolved Dissolved Holmium (Ho). "Dissolved " indicates a the measurement was made on a filtered sample.
hostConnected Host connected A categorical variable marking the attachment of a host computer to a logger. This is used for quality control.
humificationIndex Humification index Humification index. Hummification is the processes by which organic matter decomposes to form humus. In humus the initial structures or shapes can no longer be recognized. See also humus.
hydraulicConductivity Hydraulic conductivity Hydraulic conductivity, symbolically represented as K, is a property of vascular plants, soils and rocks, that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. It depends on the intrinsic permeability of the material, the degree of saturation, and on the density and viscosity of the fluid.
hydrogen Hydrogen Hydrogen
hydrogenSulfide Hydrogen sulfide Hydrogen sulfide (H2S)
hydrogenDissolved Hydrogen, dissolved Dissolved Hydrogen
hydrogen_2_StableIsotopeRatioDelta Hydrogen-2, stable isotope ratio delta Difference in the 2H:1H ratio between the sample and standard
imaginaryDielectricConstant Imaginary dielectric constant Soil reponse of a reflected standing electromagnetic wave of a particular frequency which is related to the dissipation (or loss) of energy within the medium. This is the imaginary portion of the complex dielectric constant.
indeno_1_2_3_cd_Pyrene Indeno(1,2,3-cd)pyrene Indeno(1,2,3-cd)pyrene (C22H12)
indicator Indicator Binary status to indicate the status of an instrument or other piece of equipment.
indium Indium Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metal that makes up 0.21 parts per million of the Earth's crust. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin.
instrumentStatusCode Instrument status code Code value recorded by instrument indicating some information regarding the status of the instrument
intercept Intercept The point at which one of the variables in a function equals 0.
iodideDissolved Iodide, dissolved Dissolved Iodide (I-)
Iron Iron Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series.
ironSulfide Iron sulfide Iron sulfide (FeS2)
ironDissolved Iron, dissolved Dissolved Iron (Fe)
ironFerric Iron, ferric Ferric Iron (Fe+3)
ironFerrous Iron, ferrous Ferrous Iron (Fe+2)
ironParticulate Iron, particulate Particulate iron (Fe) in suspension
ironTotal Iron, total Total Iron (Fe)
isobutane Isobutane Isobutane
isobutyricAcid Isobutyric acid Isobutyric acid (C4H8O2)
isopentane Isopentane Isopentane
isophorone Isophorone Isophorone (C9H14O)
isopropylAlcohol Isopropyl alcohol Isopropyl alcohol (C3H8O)
isopropylbenzene Isopropylbenzene Isopropylbenzene (C9H12)
ivaFrutescenscoverage Iva frutescens coverage Areal coverage of the plant Iva frutescens
lacticAcid Lactic Acid Lactic Acid (C3H6O3)
landClassification Land classification Geographical land classification- genetically homogeneous territorial unit within natural boundaries with a certain structure and a certain character of interrelationships of considered components
lanthanum Lanthanum lanthanum is a chemical element with symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife.
lanthanumDissolved Lanthanum, dissolved Dissolved Lanthanum (La). "Dissolved " indicates a the measurement was made on a filtered sample.
latentHeatFlux Latent heat flux Latent Heat Flux
latitude Latitude Latitude as a variable measurement or observation (Spatial reference to be designated in methods). This is distinct from the latitude of a site which is a site attribute.
lead Lead Lead is a chemical element with symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is silvery with a hint of blue; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes each conclude a major decay chain of heavier elements.
leadDissolved Lead, dissolved Dissolved Lead (Pb). For chemical terms, dissolved indicates a filtered sample
leadDistributionCoefficient Lead, distribution coefficient Ratio of concentrations of lead in two phases in equilibrium with each other. Phases must be specified.
leadParticulate Lead, particulate Particulate lead (Pb) in suspension
leadTotal Lead, total Total Lead (Pb). For chemical terms, total indicates an unfiltered sample.
lead_208 Lead-208 Stable isotope of lead. The term stable isotope has a meaning similar to stable nuclide, but is preferably used when speaking of nuclides of a specific element. Hence, the plural form stable isotopes usually refers to isotopes of the same element. The relative abundance of such stable isotopes can be measured experimentally (isotope analysis), yielding an isotope ratio that can be used as a research tool.
leafAreaIndex Leaf area index (LAI) Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m2 / m2) in broadleaf canopies.
leafWetness Leaf wetness The effect of moisture settling on the surface of a leaf as a result of either condensation or rainfall.
length Length Length is a measure of distance.
lightAttenuationCoefficient Light attenuation coefficient Light attenuation coefficient
limoniumNashiiCoverage Limonium nashii Coverage Areal coverage of the plant Limonium nashii
lithiumDissolved Lithium, dissolved Dissolved Lithium (Li). For chemical terms, dissolved indicates a filtered sample.
lithiumTotal Lithium, total Total Lithium (Li). For chemical terms, total indicates an unfiltered sample.
litterPlant Litter, plant Litterfall, plant litter, leaf litter, tree litter, soil litter, or duff, is dead plant material (such as leaves, bark, needles, twigs, and cladodes) that have fallen to the ground.
liverMass Liver, mass Mass of the sample of liver tissue used for analyses
loadSuspended Load, suspended The suspended load of a flow of fluid, such as a river, is the portion of its sediment uplifted by the fluid's flow in the process of sediment transportation. It is kept suspended by the fluid's turbulence. The suspended load generally consists of smaller particles, like clay, silt, and fine sands.
loggerStopped Logger stopped A categorical variable indicating that a logger was told to stop recording data. This is used for quality control.
longitude Longitude Longitude as a variable measurement or observation (Spatial reference to be designated in methods). This is distinct from the longitude of a site which is a site attribute.
lossOnIgnition Loss on ignition Loss on ignition is a test used in inorganic analytical chemistry, particularly in the analysis of minerals. It consists of strongly heating ("igniting") a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change.
lowBatteryCount Low battery count A counter of the number of times the battery voltage dropped below a minimum threshold
LSI LSI Langelier Saturation Index is an indicator of the degree of saturation of water with respect to calcium carbonate
luminousFlux Luminous Flux A measure of the total amount of visible light present
lutetium Lutetium Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry air, but not in moist air. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths.
lutetiumDissolved Lutetium, dissolved Dissolved Lutetium (Lu). "Dissolved " indicates a the measurement was made on a filtered sample.
lyciumCarolinianumCoverage Lycium carolinianum Coverage Areal coverage of the plant Lycium carolinianum
magnesium Magnesium Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (Group 2, or alkaline earth metals) of the periodic table: they each have the same electron configuration in their outer electron shell producing a similar crystal structure.
magnesiumDissolved Magnesium, dissolved Dissolved Magnesium (Mg)
magnesiumTotal Magnesium, total Total Magnesium (Mg)
malathion Malathion Butanedioic acid, [(dimethoxyphosphinothioyl)thio]-, diethyl ester (C10H19O6PS2)
manganese Manganese Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in combination with iron, and in many minerals. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.
manganeseDissolved Manganese, dissolved Dissolved Manganese (Mn)
manganeseParticulate Manganese, particulate Particulate manganese (Mn) in suspension
manganeseTotal Manganese, total Total manganese (Mn). "Total" indicates was measured on a whole water (unfiltered) sample.
mass Mass Mass is a property of a physical body. It is generally a measure of an object's resistance to changing its state of motion when a force is applied.
melanovanadite Melanovanadite melanovanadite a mineral Ca2V10O25 that is a complex oxide of calcium and vanadium
mercuryDissolved Mercury, dissolved Dissolved Mercury (Hg). For chemical terms, dissolved indicates a filtered sample.
mercuryTotal Mercury, total Total Mercury (Hg). For chemical terms, total represents an unfiltered sample.
methane Methane Methane (CH4)
methaneDissolved Methane, dissolved Dissolved Methane (CH4)
methanol Methanol Methanol (CH3OH)
methoxychlor Methoxychlor Methoxychlor (C16H15Cl3O2)
methylTert_ButylEther_MTBE Methyl tert-butyl ether (MTBE) Methyl tert-butyl ether (MTBE) (C5H12O)
methylchrysene Methylchrysene Methylchrysene (C19H14)
methyleneBlueActiveSubstances Methylene blue active substances Methylene Blue Active Substances (MBAS)
methyleneChloride_Dichloromethane Methylene chloride (Dichloromethane) Methylene chloride (Dichloromethane) (CH2Cl2)
methylfluoranthene Methylfluoranthene Methylfluoranthene (C17H12)
methylfluorene Methylfluorene Methylfluorene (C14H12)
methylmercury Methylmercury Methylmercury (CH3Hg)
methylpyrene Methylpyrene Methylpyrene (C17H12)
mevinphos Mevinphos Mevinphos (C7H13O6P)
mica Mica The mica group of sheet silicate minerals includes several closely related materials having nearly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition.
michaelisConstant Michaelis constant The Michaelis constant is the substrate concentration at which the reaction rate is half of Vmax. Vmax represents the maximum rate achieved by the system, at saturating substrate concentration
microsomalProtein Microsomal protein The total protein concentration within the microsomal fraction of cells. Microsomes refer to vesicle-like artifacts reformed from pieces of endoplasmic reticulum when eukaryotic cells are broken up in a laboratory.
molbydenumDissolved Molbydenum, dissolved Dissolved Molbydenum (Mo). For chemical terms, dissolved indicates a filtered sample.
molybdenumDissolved Molybdenum, dissolved Dissolved Molybdenum (Mo). "Dissolved " indicates a the measurement was made on a filtered sample.
molybdenumTotal Molybdenum, total total Molybdenum (Mo). For chemical terms, total represents an unfiltered sample.
momentumFlux Momentum flux Momentum flux
monanthochloeLittoralisCoverage Monanthochloe littoralis Coverage Areal coverage of the plant Monanthochloe littoralis
NAlbuminoid N, albuminoid Albuminoid Nitrogen
n_Alkane_C15 n-alkane, C15 C15 alkane, normal (i.e. straight-chain) isomer, common name: n-Pentadecane, formula : C15H32
n_Alkane_C16 n-alkane, C16 C16 alkane, normal (i.e. straight-chain) isomer, common name: n-Hexadecane, formula: C16H34. Synonym: cetane
n_Alkane_C17 n-alkane, C17 C17 alkane, normal (i.e. straight-chain) isomer, common name: n-Heptadecane, formula : C17H36
n_Alkane_C18 n-alkane, C18 C18 alkane, normal (i.e. straight-chain) isomer, common name: n-Octadecane, formula : C18H38
n_Alkane_C19 n-alkane, C19 C19 alkane, normal (i.e. straight-chain) isomer, common name: n-Nonadecane, formula : C19H40
n_Alkane_C20 n-alkane, C20 C20 alkane, normal (i.e. straight-chain) isomer, common name: n-Icosane, formula : C20H42. Synonyms: didecyl, eicosane.
n_Alkane_C21 n-alkane, C21 C21 alkane, normal (i.e. straight-chain) isomer, common name: n-Henicosane, formula : C21H44.
n_Alkane_C22 n-alkane, C22 C22 alkane, normal (i.e. straight-chain) isomer, common name: n-Docosane, formula : C22H46
n_Alkane_C23 n-alkane, C23 C23 alkane, normal (i.e. straight-chain) isomer, common name: n-Tricosane, formula : C23H48
n_Alkane_C24 n-alkane, C24 C24 alkane, normal (i.e. straight-chain) isomer, common name: n-Tetracosane, formula : C24H50
n_Alkane_C25 n-alkane, C25 C25 alkane, normal (i.e. straight-chain) isomer, common name: n-Pentacosane, formula : C25H52
n_Alkane_C26 n-alkane, C26 C26 alkane, normal (i.e. straight-chain) isomer, common name: n-Hexacosane, formula : C26H54, synonyms: cerane, hexeikosane
n_Alkane_C27 n-alkane, C27 C27 alkane, normal (i.e. straight-chain) isomer, common name: n-Heptacosane, formula : C27H56
n_Alkane_C28 n-alkane, C28 C28 alkane, normal (i.e. straight-chain) isomer, common name: n-Octacosane, formula : C28H58
n_Alkane_C29 n-alkane, C29 C29 alkane, normal (i.e. straight-chain) isomer, common name: n-Nonacosane, formula : C29H60
n_Alkane_C30 n-alkane, C30 C30 alkane, normal (i.e. straight-chain) isomer, common name: n-Triacontane, formula : C30H62
n_Alkane_C31 n-alkane, C31 C31 alkane,normal (i.e. straight-chain) isomer, common name: n-Hentriacontane, formula : C31H64, Synonym: untriacontane
n_Alkane_C32 n-alkane, C32 C32 alkane, normal (i.e. straight-chain) isomer, common name: n-Dotriacontane, formula : C32H66, Synonym: dicetyl
n_Alkane_C33 n-alkane, C33 C33 alkane, (i.e. straight-chain) isomer, common name: n-Tritriacontane, formula : C33H68
n_AlkaneLongChain n-alkane, long-chain long-chain alkanes, normal (i.e. straight chain) isomer (isomer range of alkanes measured should be specified)
n_AlkaneShortChain n-alkane, short-chain short-chain alkanes, normal (i.e. straight chain) isomer (isomer range of alkanes measured should be specified)
n_AlkaneTotal n-alkane, total Total alkane, normal (i.e. straight chain) isomer (isomer range of alkanes measured should be specified)
N_Nitrosodi_n_Butylamine N-Nitrosodi-n-butylamine N-Nitrosodi-n-butylamine (C8H18N2O)
N_Nitrosodi_n_Propylamine N-Nitrosodi-n-propylamine N-Nitrosodi-n-propylamine (C6H14N2O)
N_Nitrosodiethylamine N-Nitrosodiethylamine N-Nitrosodiethylamine (C4H10N2O)
N_Nitrosodimethylamine N-Nitrosodimethylamine N-Nitrosodimethylamine (C2H6N2O)
N_Nitrosodiphenylamine N-Nitrosodiphenylamine N-Nitrosodiphenylamine (C12H10N2O)
N_Nitrosomethylethylamine N-Nitrosomethylethylamine N-Nitrosomethylethylamine (C3H8N2O)
nacrite Nacrite Nacrite Al2Si2O5(OH)4 is a clay mineral that is polymorphous (or polytypic) with kaolinite. It crystallizes in the monoclinic system. X-ray diffraction analysis is required for positive identification. Nacrite was first described in 1807 for an occurrence in Saxony, Germany. The name is from nacre in reference to the mother of pearl luster of nacrite masses.
naphthalene Naphthalene Naphthalene (C10H8)
NDVI NDVI Normalized difference vegetation index
neodymium Neodymium Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach.
neodymiumDissolved Neodymium, dissolved Dissolved Neodymium (Nd). "Dissolved " indicates a the measurement was made on a filtered sample.
netHeatFlux Net heat flux Outgoing rate of heat energy transfer minus the incoming rate of heat energy transfer through a given area
neutronCount Neutron Count Neutron counts of the naturally occurring cosmic rays.
nickel Nickel Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Pure nickel, powdered to maximize the reactive surface area, shows a significant chemical activity, but larger pieces are slow to react with air under standard conditions because an oxide layer forms on the surface and prevents further corrosion (passivation). Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atmosphere.
nickelDissolved Nickel, dissolved Dissolved Nickel (Ni)
nickelDistributionCoefficient Nickel, distribution coefficient Ratio of concentrations of nickel in two phases in equilibrium with each other. Phases must be specified.
nickelParticulate Nickel, particulate Particulate nickel (Ni) in suspension
nickelTotal Nickel, total Total Nickel (Ni). "Total" indicates was measured on a whole water (unfiltered) sample.
niobiumDissolved Niobium, dissolved Niobium, formerly known as columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, crystalline, ductile transition metal, often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from Greek mythology, specifically Niobe, who was the daughter of Tantalus, the namesake of tantalum
niobiumTotal Niobium, total Niobium, formerly known as columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, crystalline, ductile transition metal, often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from Greek mythology, specifically Niobe, who was the daughter of Tantalus, the namesake of tantalum
nitrobenzene Nitrobenzene Nitrobenzene (C6H5NO2)
nitrogen Nitrogen Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. Although Carl Wilhelm Scheele and Henry Cavendish had independently done so at about the same time, Rutherford is generally accorded the credit because his work was published first. The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates. Antoine Lavoisier suggested instead the name azote, from the Greek άζωτικός "no life", as it is an asphyxiant gas; this name is instead used in many languages, such as French, Russian, and Turkish, and appears in the English names of some nitrogen compounds such as hydrazine, azides and azo compounds.
nitrogenDissolved_Free_Ionized_Ammonia_NH3_NH4 Nitrogen, dissolved (free+ionized) Ammonia (NH3) + (NH4) Dissolved (free+ionized) Ammonia
nitrogenDissolvedInorganic Nitrogen, dissolved inorganic Dissolved inorganic nitrogen
nitrogenDissolvedKjeldahl Nitrogen, dissolved Kjeldahl Dissolved Kjeldahl (organic nitrogen + ammonia (NH3) + ammonium (NH4))nitrogen
nitrogenDissolvedNitrate_NO3 Nitrogen, dissolved nitrate (NO3) Dissolved nitrate (NO3) nitrogen
nitrogenDissolvedNitrite_NO2 Nitrogen, dissolved nitrite (NO2) Dissolved nitrite (NO2) nitrogen
nitrogenDissolvedNitrite_NO2_Nitrate_NO3 Nitrogen, dissolved nitrite (NO2) + nitrate (NO3) Dissolved nitrite (NO2) + nitrate (NO3) nitrogen
nitrogenDissolvedOrganic Nitrogen, dissolved organic Dissolved Organic Nitrogen
nitrogenGas Nitrogen, gas Gaseous Nitrogen (N2)
nitrogenInorganic Nitrogen, inorganic Total Inorganic Nitrogen
nitrogen_NH3 Nitrogen, NH3 Free Ammonia (NH3)
nitrogenNH3_NH4 Nitrogen, NH3 + NH4 Total (free+ionized) Ammonia
nitrogen_NH4 Nitrogen, NH4 Ammonium (NH4)
nitrogenNitrate_NO3 Nitrogen, nitrate (NO3) Nitrate (NO3) Nitrogen
nitrogenNitrite_NO2 Nitrogen, nitrite (NO2) Nitrite (NO2) Nitrogen
nitrogenNitrite_NO2_Nitrate_NO3 Nitrogen, nitrite (NO2) + nitrate (NO3) Nitrite (NO2) + Nitrate (NO3) Nitrogen
nitrogenOrganic Nitrogen, organic Organic Nitrogen
nitrogenOrganicKjeldahl Nitrogen, organic kjeldahl Organic Kjeldahl (organic nitrogen + ammonia (NH3) + ammonium (NH4)) nitrogen
nitrogenParticulateOrganic Nitrogen, particulate organic Particulate Organic Nitrogen
nitrogenTotal Nitrogen, total Total Nitrogen (NO3+NO2+NH4+NH3+Organic)
nitrogenTotalDissolved Nitrogen, total dissolved Total dissolved nitrogen
nitrogenTotalKjeldahl Nitrogen, total kjeldahl Total Kjeldahl Nitrogen (Ammonia+Organic)
nitrogenTotalNitrite Nitrogen, total nitrite Total nitrite (NO2)
nitrogenTotalOrganic Nitrogen, total organic Total (dissolved + particulate) organic nitrogen
nitrogen_15 Nitrogen-15 15 Nitrogen, Delta Nitrogen
nitrogen_15_StableIsotopeRatioDelta Nitrogen-15, stable isotope ratio delta Difference in the 15N:14N ratio between the sample and standard (del N 15)
nitrousOxide Nitrous oxide Nitrous oxide (N2O)
noVegetationCoverage No vegetation coverage Areal coverage of no vegetation
o_Xylene o-Xylene o-Xylene (C8H10)
odor Odor Odor
offset Offset Constant to be added as an offset to a variable of interest.
oilAndGrease Oil and grease Oil and grease
organicMatter Organic matter The organic matter component of a complex material.
orientation Orientation Azimuth orientation of sensor platform
orthoclase Orthoclase Orthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K-feldspar. The gem known as moonstone (see below) is largely composed of orthoclase.
osmoticPressure Osmotic pressure Osmotic pressure
oxygen Oxygen Oxygen
oxygenFlux Oxygen flux Oxygen (O2) flux
oxygenUptake Oxygen uptake Consumption of oxygen by biological and/or chemical processes
oxygenDissolved Oxygen, dissolved Dissolved oxygen
oxygenDissolvedPercentOfSaturation Oxygen, dissolved percent of saturation Dissolved oxygen, percent saturation
oxygenDissolvedTransducerSignal Oxygen, dissolved, transducer signal Dissolved oxygen, raw data from sensor
oxygen_18 Oxygen-18 18 O, Delta O
oxygen_18_StableIsotopeRatioDelta Oxygen-18, stable isotope ratio delta Difference in the 18O:16O ratio between the sample and standard
ozone Ozone Ozone (O3)
parameter Parameter Parameter related to a hydrologic process. An example usage would be for a starge-discharge relation parameter.
parathion_Ethyl Parathion-ethyl Parathion-ethyl (C10H14NO5PS)
particleCounts Particle counts Count of insoluble particles in a liquid like rainwater
pentachlorobenzene Pentachlorobenzene Pentachlorobenzene (C6HCl5)
pentachlorophenol Pentachlorophenol Pentachlorophenol (C6HCl5O)
pentane Pentane Pentane
percentFullScale Percent full scale The percent of full scale for an instrument
peridinin Peridinin The phytoplankton pigment Peridinin
permethrin Permethrin Permethrin (C21H20Cl2O3)
permittivity Permittivity Permittivity is a physical quantity that describes how an electric field affects, and is affected by a dielectric medium, and is determined by the ability of a material to polarize in response to the field, and thereby reduce the total electric field inside the material. Thus, permittivity relates to a material's ability to transmit (or "permit") an electric field.
permittivityElectrical Permittivity, electrical In electromagnetism, absolute permittivity, often simply called permittivity, usually denoted by the Greek letter ε (epsilon), is the measure of capacitance that is encountered when forming an electric field in a particular medium. More specifically, permittivity describes the amount of charge needed to generate one unit of electric flux in a particular medium. Accordingly, a charge will yield more electric flux in a medium with low permittivity than in a medium with high permittivity. Permittivity is the measure of a material's ability to store an electric field in the polarization of the medium.
perylene Perylene Perylene (C20H12), a polycyclic aromatic hydrocarbon (PAH)
petroleumHydrocarbonTotal Petroleum hydrocarbon, total Total petroleum hydrocarbon
pH pH pH is the measure of the acidity or alkalinity of a solution. pH is formally a measure of the activity of dissolved hydrogen ions (H+). Solutions in which the concentration of H+ exceeds that of OH- have a pH value lower than 7.0 and are known as acids.
phenanthrene Phenanthrene Phenanthrene (C14H10), a polycyclic aromatic hydrocarbon (PAH)
phenol Phenol Phenol (C6H5OH)
phenolicsTotal Phenolics, total Total Phenolics
pheophytin Pheophytin Pheophytin (Chlorophyll which has lost the central Mg ion) is a degradation product of Chlorophyll
pheophytin Pheophytin Pheophytin or phaeophytin (abbreviated Pheo) is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the photosynthetic reaction center (RC P870) found in purple bacteria. In both PS II and RC P870, light drives electrons from the reaction center through pheophytin, which then passes the electrons to a quinone (QA) in RC P870 and RC P680.
phorate Phorate Phorate (C7H17O2PS3)
phosphorodithioicAcid Phosphorodithioic acid Phosphorodithioic acid (C10N12N3O3PS2)
phosphorus Phosphorus Phosphorus is a chemical element with symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. It has a concentration in the Earth's crust of about one gram per kilogram (compare copper at about 0.06 grams). With few exceptions, minerals containing phosphorus are in the maximally oxidized state as inorganic phosphate rocks.
phosphorusPentoxide Phosphorus pentoxide Phosphorus pentoxide is a chemical compound with molecular formula P4O10 (with its common name derived from its empirical formula, P2O5). This white crystalline solid is the anhydride of phosphoric acid.
phosphorusDissolved Phosphorus, dissolved Dissolved Phosphorus (P)
phosphorusDissolvedOrganic Phosphorus, dissolved organic Dissolved organic phosphorus
phosphorusInorganic Phosphorus, inorganic Inorganic Phosphorus
phosphorusOrganic Phosphorus, organic Organic Phosphorus
phosphorusOrthophosphate Phosphorus, orthophosphate Orthophosphate Phosphorus
phosphorusOrthophosphateDissolved Phosphorus, orthophosphate dissolved Dissolved orthophosphate phosphorus
phosphorusOrthophosphateTotal Phosphorus, orthophosphate total Total orthophosphate phosphorus
phosphorusParticulate Phosphorus, particulate Particulate phosphorus
phosphorusParticulateOrganic Phosphorus, particulate organic Particulate organic phosphorus in suspension
phosphorusPhosphate_PO4 Phosphorus, phosphate (PO4) Phosphate phosphorus
hosphorusPhosphateFlux Phosphorus, phosphate flux Phosphate (PO4) flux
phosphorusPolyphosphate Phosphorus, polyphosphate Polyphosphate Phosphorus
phosphorusTotal Phosphorus, total Total Phosphorus
phosphorusTotalDissolved Phosphorus, total dissolved Total dissolved phosphorus
photosyntheticPhotonFluxDensity Photosynthetic photon flux density (PPFD) The number of photons per unit time and per unit area in the wavelength band 400 to 700 nm
phytoplankton Phytoplankton Measurement of phytoplankton with no differentiation between species
piperonylButoxide Piperonyl Butoxide Piperonyl Butoxide (C19H30O5)
plagioclase Plagioclase Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Ancient Greek for "oblique fracture", in reference to its two cleavage angles)
polycyclicAromaticHydrocarbonAlkyl Polycyclic aromatic hydrocarbon, alkyl Polycyclic aromatic hydrocarbon (PAH) having at least one alkyl sidechain (methyl, ethyl or other alkyl group) attached to the aromatic ring structure
polycyclicAromaticHydrocarbonParent Polycyclic aromatic hydrocarbon, parent Unsubstituted (i.e., non-alkylated) polycyclic aromatic hydrocarbon (PAH)
polycyclicAromaticHydrocarbonTotal Polycyclic aromatic hydrocarbon, total total polycyclic aromatic hydrocarbon (PAH), also known as poly-aromatic hydrocarbons or polynuclear aromatic hydrocarbons
porosity Porosity Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0 and 100%.
position Position Position of an element that interacts with water such as reservoir gates
potassium Potassium Potassium is a chemical element with symbol K and atomic number 19. It was first isolated from potash, the ashes of plants, from which its name derives. In the periodic table, potassium is one of the alkali metals. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. Potassium in nature occurs only in ionic salts. Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction, and burning with a lilac-colored flame. It is found dissolved in sea water (which is 0.04% potassium by weight), and is part of many minerals.
potassiumOxide Potassium oxide Potassium oxide (K2O), or Kalium oxide, is an ionic compound of potassium and oxygen.
potassiumDissolved Potassium, dissolved Dissolved Potassium (K)
potassiumTotal Potassium, total Total Potassium (K)
praseodymium Praseodymium Praseodymium is a chemical element with symbol Pr and atomic number 59. It is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties.
praseodymiumDissolved Praseodymium, dissolved Dissolved Praseodymium (Pr). "Dissolved " indicates a the measurement was made on a filtered sample.
precipitation Precipitation Precipitation such as rainfall. Should not be confused with settling.
pressureAbsolute Pressure, absolute Pressure
pressureGauge Pressure, gauge Pressure relative to the local atmospheric or ambient pressure
primaryProductivity Primary productivity Primary Productivity
primaryProductivityGross Primary productivity, gross Rate at which an ecosystem accumulates energy by fixation of sunlight, including that consumed by the ecosystem.
programSignature Program signature A unique data recorder program identifier which is useful for knowing when the source code in the data recorder has been modified.
pronamide Pronamide Pronamide (C12H11Cl2NO)
propane Propane Propane
propaneDissolved Propane, dissolved Dissolved Propane (C3H8)
propanoicAcid Propanoic acid Propanoic acid (C3H6O2)
propyleneGlycol Propylene glycol Propylene glycol (C3H8O2)
pyrene Pyrene Pyrene (C16H10), a polycyclic aromatic hydrocarbon (PAH)
pyridine Pyridine Pyridine (C5H5N)
quartz Quartz Quartz is a type of silicate mineral composed of silicon and oxygen atoms.
radiationIncoming Radiation, incoming Incoming radiation
radiationIncomingLongwave Radiation, incoming longwave Incoming Longwave Radiation
radiationIncomingPAR Radiation, incoming PAR Incoming Photosynthetically-Active Radiation
radiationIncomingShortwave Radiation, incoming shortwave Incoming Shortwave Radiation
radiationIncomingUV_A Radiation, incoming UV-A Incoming Ultraviolet A Radiation
radiationIncomingUV_B Radiation, incoming UV-B Incoming Ultraviolet B Radiation
radiationNet Radiation, net Net Radiation
radiationNetLongwave Radiation, net longwave Net Longwave Radiation
radiationNetPAR Radiation, net PAR Net Photosynthetically-Active Radiation
radiationNetShortwave Radiation, net shortwave Net Shortwave radiation
radiationOutgoingLongwave Radiation, outgoing longwave Outgoing Longwave Radiation
radiationOutgoingPAR Radiation, outgoing PAR Outgoing Photosynthetically-Active Radiation
radiationOutgoingShortwave Radiation, outgoing shortwave Outgoing Shortwave Radiation
radiationTotalIncoming Radiation, total incoming Total amount of incoming radiation from all frequencies
radiationTotalOutgoing Radiation, total outgoing Total amount of outgoing radiation from all frequencies
radiationTotalShortwave Radiation, total shortwave Total Shortwave Radiation
radium_226 Radium-226 An isotope of radium in the uranium-238 decay series
radium_228 Radium-228 An isotope of radium in the thorium-232 decay series
radon_222 Radon-222 An isotope of radon
rainfallRate Rainfall rate A measure of the intensity of rainfall, calculated as the depth of water to fall over a given time period if the intensity were to remain constant over that time interval (in/hr, mm/hr, etc)
realDielectricConstant Real dielectric constant Soil reponse of a reflected standing electromagnetic wave of a particular frequency which is related to the stored energy within the medium. This is the real portion of the complex dielectric constant.
receivedSignalStrenghtIndication Received signal strength indication In telecommunications, received signal strength indicator (RSSI) is a measurement of the power present in a received radio signal.
rechargeGroundwater Recharge, groundwater Groundwater recharge or deep drainage or deep percolation is a hydrologic process where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface. Recharge occurs both naturally (through the water cycle) and through anthropogenic processes (i.e., "artificial groundwater recharge"), where rainwater and or reclaimed water is routed to the subsurface.
recorderCode Recorder code A code used to identifier a data recorder.
reductionPotential Reduction potential Oxidation-reduction potential
reflectivity Reflectivity dBZ stands for decibel relative to Z. It is a logarithmic dimensionless technical unit used in radar, mostly in weather radar, to compare the equivalent reflectivity factor (Z) of a radar signal reflected off a remote object (in mm6 per m3) to the return of a droplet of rain with a diameter of 1 mm (1 mm6 per m3). It is proportional to the number of drops per unit volume and the sixth power of drops' diameter and is thus used to estimate the rain or snow intensity.
relativeHumidity Relative humidity Relative humidity
remark Remark Manually added comment field to provide additional information about a particular record.
reservoirStorage Reservoir storage Reservoir water volume
resistivityElectrical Resistivity, electrical The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes.
respirationEcosystem Respiration, ecosystem Gross carbon dioxide production by all organisms in an ecosystem. Ecosystem respiration is the sum of all respiration occurring by the living organisms in a specific ecosystem.
respirationNet Respiration, net Net respiration
retene Retene Retene (C18H18), a polycyclic aromatic hydrocarbon (PAH), also known as methyl isopropyl phenanthrene or 1-methyl-7-isopropyl phenanthrene
rheniumTotal Rhenium, total Total Rhenium (Re)
roundness Roundness Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle. Roundness applies in two dimensions, such as the cross sectional circles along a cylindrical object such as a shaft or a cylindrical roller for a bearing. In geometric dimensioning and tolerancing, control of a cylinder can also include its fidelity to the longitudinal axis, yielding cylindricity. The analogue of roundness in three dimensions (that is, for spheres) is sphericity.
rubidium Rubidium A chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with a standard atomic weight of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. On Earth, natural rubidium comprises two isotopes: 72% is the stable isotope, 85Rb; 28% is the slightly radioactive 87Rb, with a half-life of 49 billion years—more than three times longer than the estimated age of the universe.
ruthenium_106 Ruthenium-106 The most stable isotope of ruthenium with a half life of 373.59 days.
salicorniaBigeloviiCoverage Salicornia bigelovii coverage Areal coverage of the plant Salicornia bigelovii
salicorniaVirginicaCoverage Salicornia virginica coverage Areal coverage of the plant Salicornia virginica
salinity Salinity Salinity
samarium Samarium A chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3.
samariumDissolved Samarium, dissolved Dissolved Samarium (Sm). "Dissolved " indicates a the measurement was made on a filtered sample.
Sand Sand USDA particle size distribution category. 0.5 to 2 mm diameter fine earth particles.
sapFlow Sap flow Movement of xylem sap in trees.
scandium Scandium A chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been classified as a rare-earth element, together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.
scatterAntiStokes Scatter, anti-stokes The material loses energy and the emitted photon has a higher energy than the absorbed photon. This outcome is labeled anti-Stokes Raman scattering.
scatterStokes Scatter, Stokes The material absorbs energy and the emitted photon has a lower energy than the incident photon. This outcome is labeled Stokes Raman scattering in honor of George Stokes who showed in 1852 that fluorescence is due to light emission at longer wavelength (now known to correspond to lower energy) than the absorbed incident light.
secchiDepth Secchi depth Secchi depth
sedimentPassingSieve Sediment, passing sieve The amount of sediment passing a sieve in a gradation test
sedimentRetainedOnSieve Sediment, retained on sieve The amount of sediment retained on a sieve in a gradation test
sedimentSuspended Sediment, suspended Suspended Sediment
seismicRefraction Seismic refraction Seismic refraction is a geophysical principle (see refraction) governed by Snell's Law. Used in the fields of engineering geology, geotechnical engineering and exploration geophysics, seismic refraction traverses (seismic lines) are performed using a seismograph(s) and/or geophone(s), in an array and an energy source.
seleniumDissolved Selenium, dissolved Dissolved selenium (Se). For chemical terms, dissolved indicates a filtered sample.
seleniumDistributionCoefficient Selenium, distribution coefficient Ratio of concentrations of selenium in two phases in equilibrium with each other. Phases must be specified.
seleniumParticulate Selenium, particulate Particulate selenium (Se) in suspension
seleniumTotal Selenium, total Total Selenium (Se). For chemical terms, total indicates an unfiltered sample
sensibleHeatFlux Sensible heat flux Sensible Heat Flux
sequenceNumber Sequence number A counter of events in a sequence
shannonDiversityIndex Shannon diversity index A diversity index that is based on the number of taxa, and the proportion of individuals in each taxa relative to the entire community, evaluated as entropy. Also known as Shannon-Weaver diversity index, the Shannon-Wiener index, the Shannon index and the Shannon entropy.
shannonEvennessIndex Shannon evenness index A dimensionless diversity index, calculated as a ratio of the Shannon diversity index over its maximum. Also known as the Shannon Weaver evenness index
sigma_t Sigma-t Density of seawater calculated with in situ salinity and temperature, but pressure equal to zero, rather than the in situ pressure, and 1000 kg/m^3 is subtracted. Defined as (S,T)-1000 kg m-3, where (S,T) is the density of a sample of seawater at temperature T and salinity S, measured in kg m-3, at standard atmospheric pressure.
signalQuality Signal quality Internal signature measurent quality
signalToNoiseRatio Signal-to-noise ratio Signal-to-noise ratio (often abbreviated SNR or S/N) is defined as the ratio of a signal power to the noise power corrupting the signal. The higher the ratio, the less obtrusive the background noise is.
silica Silica Silica (SiO2)
silicaDissolved Silica, dissolved Dissolved silica (SiO2)
silicate Silicate Silicate. Chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, calcium, iron, magnesium, manganese, potassium, sodium, or zirconium.
silicicAcid Silicic acid Hydrated silica disolved in water
silicicAcidFlux Silicic acid flux Silicate acid (H4SiO4) flux
silicon Silicon Silicon (Si)
siliconDissolved Silicon, dissolved Dissolved Silicon (Si)
siliconTotal Silicon, total Total silicon (Si)
Silt Silt USDA particle size distribution category. 0.002 to 0.5 mm diameter fine earth particles.
silver Silver A chemical element with symbol Ag (from the Latin argentum, derived from the Proto-Indo-European h₂erǵ: "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.
silverDissolved Silver, dissolved Dissolved silver (Ag). For chemical terms, dissolved indicates a filtered sample.
silverTotal Silver, total Total Silver (Ag). For chemical terms, total represents an unfiltered sample.
slope Slope Ratio between two variables in a linear relationship.
snowDepth Snow depth Snow depth
snowLayerHardness Snow layer hardness Snow layers within the snowpack are a record of the winter’s weather. Like tree rings or strata of rock, layers can be traced to dates and conditions that formed them. One of the most important characteristics of a layer is its hardness. Harder snow is stronger and cohesive, while softer snow is weaker.
snowWaterEquivalent Snow water equivalent The depth of water if a snow cover is completely melted, expressed in units of depth, on a corresponding horizontal surface area.
sodium Sodium A chemical element with symbol Na (from Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na. The free metal does not occur in nature, but must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and rock salt (NaCl). Many salts of sodium are highly water-soluble: sodium ions have been leached by the action of water from the Earth's minerals over eons, and thus sodium and chlorine are the most common dissolved elements by weight in the oceans.
sodiumAdsorptionRatio Sodium adsorption ratio Sodium adsorption ratio
sodiumPlusPotassium Sodium plus potassium Sodium plus potassium
sodiumDissolved Sodium, dissolved Dissolved Sodium (Na)
sodiumFractionOfCations Sodium, fraction of cations Sodium, fraction of cations
sodiumTotal Sodium, total Total Sodium (Na)
soilAggregateStability Soil aggregate stability Soil aggregate stability is a measure of the ability of soil aggregates to resist degradation when exposed to external forces such as water erosion and wind erosion, shrinking and swelling processes, and tillage. Soil aggregate stability is a measure of soil structure and can be impacted by soil management.
soilClassification Soil classification For soil resources, experience has shown that a natural system approach to classification, i.e. grouping soils by their intrinsic property (soil morphology), behaviour, or genesis, results in classes that can be interpreted for many diverse uses. Differing concepts of pedogenesis, and differences in the significance of morphological features to various land uses can affect the classification approach.
soilCoarseFraction Soil coarse fraction Fraction of particles within a soil sample that are greater that 2mm in diameter
soilHorizon Soil horizon A soil horizon is a layer parallel to the soil surface, whose physical characteristics differ from the layers above and beneath. Each soil type usually has three or four horizons.
soilOrganicMatter Soil organic matter (SOM) Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal residues at various stages of decomposition, cells and tissues of soil organisms, and substances synthesized by soil organisms.
soilOrganicMatterDensityFractionation Soil organic matter (SOM) density fractionation Density fraction of Soil organic matter (SOM) in soil. Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal residues at various stages of decomposition, cells and tissues of soil organisms, and substances synthesized by soil organisms.
soilRespiration Soil respiration Soil respiration refers to the production of carbon dioxide when soil organisms respire. This includes respiration of plant roots, the rhizosphere, microbes and fauna.
soilTexture Soil texture Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method.
solidsRixedDissolved Solids, fixed dissolved Fixed Dissolved Solids
solidsFixedSuspended Solids, fixed suspended Fixed Suspended Solids
solidsTotal Solids, total Total Solids
solidsTotalDissolved Solids, total dissolved Total Dissolved Solids
solidsTotalFixed Solids, total fixed Total Fixed Solids
solidsTotalSuspended Solids, total suspended Total Suspended Solids
solidsTotalVolatile Solids, total volatile Total Volatile Solids
solidsVolatileDissolved Solids, volatile dissolved Volatile Dissolved Solids
solidsVolatileSuspended Solids, volatile suspended Volatile Suspended Solids
spartinaAlternifloraCoverage Spartina alterniflora coverage Areal coverage of the plant Spartina alterniflora
spartinaSpartineaCoverage Spartina spartinea coverage Areal coverage of the plant Spartina spartinea
specificConductance Specific conductance Specific conductance
speedOfSound Speed of sound Speed of sound in the medium sampled
squalene Squalene Squalene (C30H50)
streamflow Streamflow The volume of water flowing past a fixed point. Equivalent to discharge
streptococciFecal Streptococci, fecal Fecal Streptococci
strontium Strontium Strontium is the chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly chemically reactive. The metal forms a dark oxide layer when it is exposed to air. Strontium has physical and chemical properties similar to those of its two vertical neighbors in the periodic table, calcium and barium. It occurs naturally mainly in the minerals celestine and strontianite, and is mostly mined from these. While natural strontium is stable, the synthetic 90Sr isotope is radioactive and is one of the most dangerous components of nuclear fallout, as strontium is absorbed by the body in a similar manner to calcium. Natural stable strontium, on the other hand, is not hazardous to health.
strontiumDissolved Strontium, dissolved Dissolved Strontium (Sr)
strontiumTotal Strontium, total Total Strontium (Sr)
styrene Styrene Styrene (C8H8)
suaedaLinearisCoverage Suaeda linearis coverage Areal coverage of the plant Suaeda linearis
suaedaMaritimaCoverage Suaeda maritima coverage Areal coverage of the plant Suaeda maritima
sulfate Sulfate The sulfate or sulphate (see spelling differences) ion is a polyatomic anion with the empirical formula SO2- 4. Sulfate is the spelling recommended by IUPAC, but sulphate is used in British English. Salts, acid derivatives, and peroxides of sulfate are widely used in industry. Sulfates occur widely in everyday life. Sulfates are salts of sulfuric acid and many are prepared from that acid.
sulfateDissolved Sulfate, dissolved Dissolved Sulfate (SO4)
sulfateTotal Sulfate, total Total Sulfate (SO4)
sulfideDissolved Sulfide, dissolved Dissolved Sulfide
sulfideTotal Sulfide, total Total sulfide
sulfur Sulfur Sulfur (S)
sulfurDioxide Sulfur dioxide Sulfur dioxide (SO2)
sulfurDissolved Sulfur, dissolved Dissolved Sulfur (S)
sulfurOrganic Sulfur, organic Organic Sulfur
sulfurPyritic Sulfur, pyritic Pyritic Sulfur
sunshineDuration Sunshine duration Sunshine duration
superoxideDismutaseActivity Superoxide dismutase, activity Superoxide dismutase (SOD) activity
superoxideDismutaseDeltaCycleThreshold Superoxide dismutase, delta cycle threshold Delta cycle threshold for superoxide dismutase (sod). Cycle threshold is the PCR cycle number at which the fluorescent signal of the gene being amplified crosses the set threshold. Delta cycle threshold for sod is the difference between the cycle threshold (Ct) of sod gene expression and the cycle threshold (Ct) for the gene expression of the reference gene (e.g., beta-actin).
SUVA254 SUVA254 Specific ultraviolet absorbance at 254 nm. Determined by absorbance normalized to DOC concentration.
SUVA280 SUVA280 Specific ultraviolet absorbance at 280 nm. Determined by absorbance normalized to dissolved organic carbon (DOC) concentration.
tableOverrunErrorCount Table overrun error count A counter which counts the number of datalogger table overrun errors
tantalum Tantalum Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys.
taxaCount Taxa count Count of unique taxa. A taxon (plural: taxa) is a group of one (or more) populations of organism(s), which is judged to be a unit.
TDRWaveformRelativeLength TDR waveform relative length Time domain reflextometry, apparent length divided by probe length. Square root of dielectric
technetium Technetium Technetium is a chemical element with symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive; none are stable, excluding the fully ionized state of 97Tc.
temperature Temperature Temperature
temperatureChange Temperature change temperature change
temperatureDatalogger Temperature, datalogger Temperature, raw data from datalogger
temperatureDewPoint Temperature, dew point Dew point temperature
temperatureInitial Temperature, initial initial temperature before heating
temperatureSensor Temperature, sensor Temperature, raw data from sensor
temperatureTransducerSignal Temperature, transducer signal Temperature, raw data from sensor
terbium Terbium Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife.
terbiumDissolved Terbium, dissolved Dissolved Terbium (Tb). "Dissolved " indicates a the measurement was made on a filtered sample.
terbufos Terbufos Terbufos (C9H21O2PS3)
terpineol Terpineol Terpineol (C10H18O)
tertAmylMethylEther Tert-Amyl Methyl Ether Tert-Amyl Methyl Ether (C6H14O)
tertiaryButylAlcohol Tertiary Butyl Alcohol Tertiary Butyl Alcohol (C4H10O)
tetracene Tetracene Tetracene (C18H12), a polycyclic aromatic hydrocarbon (PAH), also known as naphthacene or benz[b]anthracene
tetrachloroethene Tetrachloroethene Tetrachloroethene (C2Cl4)
tetraethyleneGlycol Tetraethylene glycol Tetraethylene glycol (C8H18O5)
tetrahydrofuran Tetrahydrofuran Tetrahydrofuran (C4H8O)
tetramethylnaphthalene Tetramethylnaphthalene Tetramethylnaphthalene (C10H4(CH3)4), a polycyclic aromatic hydrocarbon (PAH)
thallium Thallium Thallium is a chemical element with symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air. Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. Both used the newly developed method of flame spectroscopy, in which thallium produces a notable green spectral line.
thalliumDissolved Thallium, dissolved Dissolved thallium (Tl). "dissolved" indicates measurement was made on a filtered sample.
thalliumDistributionCoefficient Thallium, distribution coefficient Ratio of concentrations of thallium in two phases in equilibrium with each other. Phases must be specified.
thalliumParticulate Thallium, particulate Particulate thallium (Tl) in suspension
thalliumTotal Thallium, total Total thallium (Tl). "Total" indicates was measured on a whole water (unfiltered) sample.
thorium Thorium Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately hard, malleable, and has a high melting point.
thorium Thorium Thorium (Th)
thoriumDissolved Thorium, dissolved Dissolved thorium. For chemical terms, dissolved indicates a filtered sample.
thorium_228 Thorium-228 An isotope of thorium in the thorium-232 decay series
thorium_230 Thorium-230 An isotope of thorium in the thorium-232 decay series
thorium_232 Thorium-232 A radioactive isotope of thorium which undergoes alpha decay
threshold Threshold A level above or below which an action is performed.
throughfall Throughfall In Hydrology, throughfall is the process which describes how wet leaves shed excess water onto the ground surface. These drops have greater erosive power because they are heavier than rain drops. Furthermore, where there is a high canopy, falling drops may reach terminal velocity, about 8 metres (26 ft), thus maximizing the drop's erosive potential.
THSWIndex THSW Index The THSW Index uses temperature, humidity, solar radiation, and wind speed to calculate an apparent temperature.
thulium Thulium Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. Like the other lanthanides, the most common oxidation state is +3, seen in its oxide, halides and other compounds; because it occurs so late in the series, however, the +2 oxidation state is also stabilized by the nearly full 4f shell that results.
thuliumDissolved Thulium, dissolved Dissolved Thulium (Tm). "Dissolved " indicates a the measurement was made on a filtered sample.
THWIndex THW Index The THW Index uses temperature, humidity, and wind speed to calculate an apparent temperature.
tideStage Tide stage Tidal stage
timeStamp Time Stamp The time at which a sensor produces output
timeElapsed Time, elapsed Time elapsed since an event occurred
tinDissolved Tin, dissolved Dissolved tin (Sn). "Dissolved " indicates a the measurement was made on a filtered sample.
tinTotal Tin, total Total tin (Sn)."Total" indicates was measured on a whole water (unfiltered) sample.
titanium Titanium Titanium (Ti)
titaniumDioxide Titanium dioxide Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula TiO 2. When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891.
titaniumDissolved Titanium, dissolved Dissolved Titanium
titaniumTotal Titanium, total Total titanium (Ti)
toluene Toluene Toluene (C6H5CH3)
topographicWetnessIndex Topographic Wetness Index (TWI) Topographic wetness index (TWI), also known as the compound topographic index (CTI), is a steady state wetness index. It is commonly used to quantify topographic control on hydrological processes.
trans_1_2_Dichloroethene trans-1,2-Dichloroethene trans-1,2-Dichloroethene (C2H2Cl2)
trans_1_3_Dichloropropene trans-1,3-Dichloropropene trans-1,3-Dichloropropene (C3H4Cl2)
transientSpeciesCoverage Transient species coverage Areal coverage of transient species
transpiration Transpiration Transpiration
tributoxyethylPhosphate Tributoxyethyl phosphate Tributoxyethyl phosphate (C42H87O13P)
trichloroethene Trichloroethene Trichloroethene (C2HCl3)
triethyleneGlycol Triethylene glycol Triethylene glycol (C6H14O4)
trifluralin Trifluralin Trifluralin (C13H16F3N3O4)
triphenylene Triphenylene Triphenylene (C18H12)
tritium_3H_DeltaTOfH2O Tritium (3H), Delta T of H2O Isotope 3H of water
TSI TSI Carlson Trophic State Index is a measurement of eutrophication based on Secchi depth
turbidity Turbidity Turbidity
ultravioletRadiationIndex Ultraviolet Radation Index The global solar UV index (UVI) was developed as an easy-to-understand measure of biologically effective UV radiation with a view to promote public awareness of the risks of UV radiation exposure and sun protection. In the initial work done on UVI in Canada, a typical midday summer erythemal irradiance of 250 mW.m-2 was found leading to the (arbitrary) definition of one UV index equal to an erythemally weighted irradiance of 25 mW.m-2. This gives a typical range of UVI 0 to 11+.
ultravioletRadiationDose Ultraviolet Radiation Dose A measure of the ability of ultraviolet radiation, as a function of wavelength, to produce just perceptible erythema in human skin.
uranium Uranium Uranium (U)
uraniumDissolved Uranium, dissolved Dissolved Uranium. For chemical terms, dissolved indicates a filtered sample.
uranium_234 Uranium-234 An isotope of uranium in the uranium-238 decay series
uranium_235 Uranium-235 An isotope of uranium that can sustain fission chain reaction
uranium_238 Uranium-238 Uranium's most common isotope
urea Urea Urea ((NH2)2CO)
ureaFlux Urea flux Urea ((NH2)2CO) flux
vanadiumDissolved Vanadium, dissolved Dissolved vanadium (V). "Dissolved" indicates the measurement was made on a filtered sample.
vanadiumParticulate Vanadium, particulate Particulate vanadium (V) in suspension
vanadiumTotal Vanadium, total Total vanadium (V). "Total" indicates was measured on a whole water (unfiltered) sample.
vaporPressure Vapor pressure The pressure of a vapor in equilibrium with its non-vapor phases
vaporPressureDeficit Vapor pressure deficit The difference between the actual water vapor pressure and the saturation of water vapor pressure at a particular temperature.
vegetationType Vegetation type Vegetation is an assemblage of plant species and the ground cover they provide.
velocity Velocity The velocity of a substance, fluid or object
vermiculite Vermiculite Vermiculite is a hydrous phyllosilicate mineral. It undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and the effect is routinely produced in commercial furnaces.
visibility Visibility Visibility
voltage Voltage Voltage or Electrical Potential
volume Volume Volume. To quantify discharge or hydrograph volume or some other volume measurement.
volumetricWaterContent Volumetric water content Volume of liquid water relative to bulk volume. Used for example to quantify soil moisture
watchdogErrorCount Watchdog error count A counter which counts the number of total datalogger watchdog errors
waterColumnEquivalentHeightAbsolute Water column equivalent height, absolute The absolute pressure (combined water + barometric) on a sensor expressed as the height of an equivalent column of water.
waterColumnEquivalentHeightBarometric Water column equivalent height, barometric Barometric pressure expressed as an equivalent height of water over the sensor.
waterContent Water Content Quantity of water contained in a material or organism
waterDepth Water depth Water depth is the distance between the water surface and the bottom of the water body at a specific location specified by the site location and offset.
waterDepthAveraged Water depth, averaged Water depth averaged over a channel cross-section or water body. Averaging method to be specified in methods.
waterFlux Water flux Water Flux
waterLevel Water level Water level relative to datum. The datum may be local or global such as NGVD 1929 and should be specified in the method description for associated data values.
waterPotential Water potential Water potential is the potential energy of water relative to pure free water (e.g. deionized water) in reference conditions. It quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects including surface tension.
waterUseAgriculture Water Use, Agriculture Water pumped for Agriculture
waterUseCommercialIndustrialPower Water Use, Commercial + Industrial + Power Water pumped by commercial, industrial users.
waterUseDomesticWells Water Use, Domestic wells Water pumped by domestic wells; residents and landowners not using public supply. Nonagriculture wells.
waterUsePublicSupply Water Use, Public Supply Water supplied by a public utility
waterUseRecreation Water Use, Recreation Recreational water use, for example golf courses.
waterVaporConcentration Water vapor concentration Water vapor concentration
waterVaporDensity Water vapor density Water vapor density
waveHeight Wave height The height of a surface wave, measured as the difference in elevation between the wave crest and an adjacent trough.
weatherConditions Weather conditions Weather conditions
wellFlowRate Well flow rate Flow rate from well while pumping
wellheadPressure Wellhead pressure The pressure exerted by the fluid at the wellhead or casinghead after the well has been shut off for a period of time, typically 24 hours
windChill Wind chill The effect of wind on the temperature felt on human skin.
windDirection Wind direction Wind direction
windGustDirection Wind gust direction Direction of gusts of wind
windGustSpeed Wind gust speed Speed of gusts of wind
windRun Wind Run The length of flow of air past a point over a time interval. Windspeed times the interval of time.
windSpeed Wind speed Wind speed
windStress Wind stress Drag or trangential force per unit area exerted on a surface by the adjacent layer of moving air
wrackCoverage Wrack coverage Areal coverage of dead vegetation
xylenesTotal Xylenes, total Total xylenes: C6H4(CH3)2
xylosidase Xylosidase An enzyme with system name 4-beta-D-xylan xylohydrolase.[1][2] This enzyme catalyses the following chemical reaction: Hydrolysis of (1->4)-beta-D-xylans, to remove successive D-xylose residues from the non-reducing termini.
ytterbium Ytterbium Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state.
ytterbiumDissolved Ytterbium, dissolved Dissolved Ytterbium (Yb). "Dissolved " indicates a the measurement was made on a filtered sample.
yttrium Yttrium Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element".
yttriumDissolved Yttrium, dissolved Dissolved Yttrium (Y). "Dissolved " indicates a the measurement was made on a filtered sample.
zeaxanthin Zeaxanthin The phytoplankton pigment Zeaxanthin
zinc Zinc Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity (electrowinning).
zincDissolved Zinc, dissolved Dissolved Zinc (Zn)
zincDistributionCoefficient Zinc, distribution coefficient Ratio of concentrations of zinc in two phases in equilibrium with each other. Phases must be specified.
zincParticulate Zinc, particulate Particulate zinc (Zn) in suspension
zincTotal Zinc, total Total zinc (Zn)."Total" indicates was measured on a whole water (unfiltered) sample.
zirconDissolved Zircon, dissolved Dissolved Zircon (Zr)
zirconium Zirconium Zirconium is a chemical element with symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral zircon, the most important source of zirconium.
zirconiumDissolved Zirconium, dissolved Dissolved Zirconium
zirconium_95 Zirconium-95 A radioactive isotope of zirconium with a half-life of 63 days
zooplankton Zooplankton Zooplanktonic organisms, non-specific