Vocabulary
BODC parameter semantic model parameter entity names
| URI | http://vocab.nerc.ac.uk/collection/S06/current/ |
|---|---|
| Description | Controlled vocabulary defining the terms that may be used to specify the property element of a parameter (part of the 'what' theme) in the BODC parameter semantic model. |
| Creator | British Oceanographic Data Centre |
| Modified | 2024-11-06 |
| Version Info | 153 |
| Identifier | S06 |
| Register Manager | British Oceanographic Data Centre |
| Register Owner | British Oceanographic Data Centre |
| See Also | https://github.com/nvs-vocabs/S06 |
| License | https://creativecommons.org/licenses/by/4.0/ |
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Members
| ID ↑ | Preferred Label ↑ | Definition ↑ | Date ↑ |
|---|---|---|---|
| S0600001 | 14C age | The age of an object determined by radiocarbon dating expressed relative to a datum of AD 1950. | 2006-02-17 |
| S0600125 | 4-pi scalar irradiance as photons | The flux of photons reaching a spherical surface from every direction. | 2017-12-18 |
| S0600084 | Absolute salinity | Salinity in terms of mass per unit mass computed from practical salinity using TEOS-10 equation of state. | 2017-09-19 |
| S0600080 | Absorbance | A measure of the quantity of incident electromagnetic radiation that is absorbed by an object, substance or solution. | 2017-07-11 |
| S0600002 | Abundance | The number of occurrences of an entity per unit area or per unit volume. | 2006-02-17 |
| S0600178 | Abundance category | Nominal scale used to qualify the abundance of an organism in a survey or sample. | 2018-06-07 |
| S0600179 | Abundance category (SACFOR) | Standardised nominal scale that classifies the abundance of marine benthic flora and fauna into 6 categories (Superabundant, Abundant, Common, Frequent, Occasional, Rare) based on the percent cover or density of organisms on the bed. | 2018-06-08 |
| S0600212 | Abundance category (SACFORN) | Standardised nominal scale that classifies the abundance of marine benthic flora and fauna into 7 categories (Superabundant, Abundant, Common, Frequent, Occasional, Rare, Not found) based on the percent cover or density of organisms on a surface. A variant of the SACFOR scale with the purpose of adding a zero category. | 2018-09-21 |
| S0600220 | Abundance increase | The positive change in the number of occurrences of an entity between two points (typically two points in time); negative values indicate a decrease. | 2019-01-21 |
| S0600209 | Acceptable proportion | Also referred to as Percent Good, this is the proportion of good data collected per beam and depth cell from an acoustic doppler current profiler (ADCP). Represented as a percentage between 0 and 100. | 2018-09-14 |
| S0600003 | Accumulation rate | The rate at which the quantity of an entity increases. | 2006-02-17 |
| S0600043 | Activity | The number of disintegrations of a radioactive substance in a given unit of time (physics) or in the ability of a substance to take part in a chemical reaction (chemistry). | 2015-09-02 |
| S0600241 | Activity ratio | Quotient of the radioactive decay rates of two co-located radionuclides. | 2019-05-30 |
| S0600254 | Amplitude | The maximum displacement of a periodic variable over a single spatial or temporal period. | 2020-06-17 |
| S0600054 | Apparent utilisation | The difference between the measured chemical susbtance concentration and its equilibrium saturation concentration in a matrix with the same physical and chemical properties. | 2016-05-20 |
| S0600146 | Area | The size of a 2-dimensional plane; for the exposed surface of a solid object use 'Surface area'. | 2018-03-27 |
| S0600316 | Area (expressed as pixels) | The size of a 2-dimensional plane represented by number of pixels captured in a digital image. | 2023-09-12 |
| S0600308 | Areal extent | The two-dimensional surface over which an object or a phenomenon is observed. | 2023-02-22 |
| S0600086 | Ash-free dry weight biomass | An estimate of the weight of organic biomass in a given area , volume or mass of environmental matrix based on the weight of a biological sample after drying minus the weight of the material left behind after total incineration of the sample (mineral fraction). | 2018-01-10 |
| S0600232 | Ash-free dry weight biomass production rate | The rate (measured or modelled) at which biomass, exclusive of water and mineral matter, is produced over a given time. | 2019-03-16 |
| S0600240 | Atomic ratio | Quotient of the number of atoms of two co-located chemical elements or isotopes. | 2019-05-30 |
| S0600217 | Attenuation | The proportion of any kind of flux or signal that is lost when absorbed or scattered by a medium. | 2018-12-05 |
| S0600218 | Attenuation due to backscatter | The fraction of scattered light that is deflected through scattering angles greater than 90 deg. | 2018-12-05 |
| S0600219 | Attenuation due to volume scatter | The fraction of scattered light that is deflected through scattering angles from 0-180 degrees that is dependent on the volume of the medium. | 2018-12-05 |
| S0600334 | Bathymetric depth | The measurement of the depth of a body of water, such as an ocean, lake, or river. | 2024-09-12 |
| S0600311 | Beta radiation activity | The decay rate of a radioactive substance. Beta refers to the emission of a beta particle (a fast energetic electron or positron) from an atomic nucleus. | 2023-06-26 |
| S0600102 | Bill depth at gonys | A standard measurement in bird biometrics. | 2017-12-01 |
| S0600287 | Biochemical oxygen demand | The amount of oxygen needed by aerobic biological organisms to break down organic material present in a water sample at certain temperature over a specific time period. | 2022-05-23 |
| S0600004 | Biomass DEPRECATED | The amount of organism per unit area or per unit volume expressed as mass or amount of a chemical constituent. This code was created too broad and was deprecated on 25/10/2018. | 2018-10-25 |
| S0600272 | Biomass as carbon | Mass of living biological organisms measured or expressed as the mass of organically bound carbon. | 2021-04-27 |
| S0600271 | Biomass as nitrogen | Mass of living biological organisms measured or expressed as the mass of organically bound nitrogen. | 2021-04-27 |
| S0600005 | Biosurface area | The surface area of organisms per unit area of per unit volume. | 2006-02-17 |
| S0600006 | Biovolume | The volume of organisms per unit area or per unit volume. | 2023-05-25 |
| S0600233 | Blubber thickness | The thickness of the layer of adipose subcutaneous tissue (blubber) found in cetaceans, pinnipeds, sirenians, and polar bears. | 2019-03-16 |
| S0600227 | Cause of death | Single cause of death of biological specimen. This is either free text or a term or code from a controlled vocabulary. | 2019-03-16 |
| S0600081 | Cell volume | The volume of a single cell or the average volume of single cells. | 2017-07-31 |
| S0600106 | Characteristic wave height | A computationally convenient approximation (root mean square wave height in sampling period multiplied by 4) to significant wave height. Significant wave height is a statistic computed from wave measurements that correspond to the average height of the highest one third of the waves, where wave height is defined as the vertical distance from a wave trough to the following wave crest. | 2017-12-07 |
| S0600288 | Chemical oxygen demand | The amount of oxygen required to oxidise all dissolved oxidisable chemical material contained in water sample. | 2022-05-23 |
| S0600007 | Clearance rate | In marine biology the clearance rate is the volume of water cleared of suspended particles over a given period of time. | 2018-09-11 |
| S0600301 | Colour (Pt/Co scale) | Also called APHA-Hazen scale or APHA-Hazen color or colour, the Platinum-Cobalt scale is a method of measuring the colour of water samples that is specific to the colour yellow. One unit of colour on the scale is defined as the colour produced by 1 milligram of platinum cobalt dissolved in 1 litre of water. | 2022-11-27 |
| S0600090 | Colour class | A character string defining a colour category in a classification. | 2017-11-25 |
| S0600045 | Concentration | The amount of a specified substance in a unit amount of another substance or matrix. | 2015-09-02 |
| S0600050 | Concentration as carbon | Concentration expressed in terms of carbon. | 2016-05-01 |
| S0600076 | Concentration change rate | The difference between the concentration of a substance at a given time minus its concentration at an earlier time divided by the time elapsed between the two time points. | 2017-06-29 |
| S0600321 | Concentration per unit mass | The mass, mole or volume of a substance in a system or mixture relative to the total mass of the system or mixture. This term is needed for mapping using I-ADOPT properties. DO NOT USE FOR P01 CREATION. | 2024-03-14 |
| S0600322 | Concentration per unit volume | The mass, mole or volume of a substance in a system or mixture relative to the total volume of the system or mixture. This term is needed for mapping using I-ADOPT properties. DO NOT USE FOR P01 CREATION. | 2024-03-14 |
| S0600056 | Concentration recalculated to zero salinity | The concentration of a substance in solution calculated as the equivalent in a zero salinity solution. | 2016-11-09 |
| S0600198 | Consumption rate | The amount of a given subtance used over a given period of time. | 2018-09-11 |
| S0600304 | Correlation factor | A measure of the quality of the returned pulse from an altimeter or similar acoustic device. Correlation factor ranges from 0 to 1. A value of 1 represents a perfect return echo with negligible noise and distortion. | 2023-01-23 |
| S0600197 | Correlation magnitude | A measure of the pulse to pulse correlation in acoustic pulses from an acoustic doppler current profiler, at the lag used for estimating the doppler phase shift. Used as a quality control indicator. | 2023-01-23 |
| S0600008 | Count | The number of occurrences of an entity. | 2006-02-17 |
| S0600173 | Count (leaves per shoot) | The number of leaves per shoot of a vascular plant. | 2018-03-27 |
| S0600307 | Coverage (as an area) | The two-dimensional surface equivalent to 100% coverage of an object or a phenomenon. | 2023-02-22 |
| S0600195 | Critical erosion velocity threshold | The velocity at which bed sediments are entrained into suspension by fluid flow. | 2018-09-04 |
| S0600290 | Density | The density of a substance or consituent is defined as its mass per unit volume. In some cases, density is also defined as weight per unit volume, although this quantity is referred to as specific weight. | 2022-06-01 |
| S0600299 | Density (dry bulk) | Mass of dry matter contained in a sample of soil or sediment divided by the volume of the sample before drying. The total volume includes particle volume, inter-particle void volume, and internal pore volume. | 2022-11-22 |
| S0600300 | Density (wet bulk) | Total mass of a fresh sample of soil or sediment (solid plus water) divided by its total volume. The total volume includes particle volume, inter-particle void volume, and internal pore volume. | 2022-11-22 |
| S0600169 | Depth | The vertical dimension through an object or a body of matter measured downward from an upper surface (or top) to its base (or bottom) (e.g. water column depth). Not to be used for depth as a spatial coordinate. | 2018-03-26 |
| S0600167 | Depth (spatial coordinate) | The vertical location of an object or an observation in a water body or in the sediment expressed as the distance below a specified datum. | 2018-03-14 |
| S0600147 | Description | A character string providing textual information either as free-text or using a controlled vocabulary. | 2018-01-10 |
| S0600296 | Dew point temperature | The temperature to which air must cool to become saturated with water vapour. | 2022-10-17 |
| S0600211 | Diameter | The length of a straight line passing through the center of a round object or figure from side to side. | 2018-09-21 |
| S0600236 | Dilution of precision | Uncertainty index associated with the geometry of a ranging system. | 2019-04-04 |
| S0600112 | Direction (from) | The compass direction (degrees clockwise from True North) from which a vector is propagating. | 2018-06-01 |
| S0600142 | Direction (from) at spectral maximum | A spectral analysis wave parameter defined as the direction from which the waves with the highest energy are coming. | 2019-04-08 |
| S0600111 | Direction (towards) | The compass direction (degrees clockwise from True North) towards which a vector is travelling. | 2018-06-01 |
| S0600214 | Direction of motion | The compass direction (degrees clockwise from True North) towards which an object is moving. | 2018-10-02 |
| S0600114 | Directional spectral density | A spectral analysis wave parameter. The variance of sea surface elevation at a given frequency (wave period reciprocal) and given direction in a directional wave power spectrum. | 2018-07-17 |
| S0600113 | Directional spreading | The standard deviation of the wave directions. | 2018-07-17 |
| S0600190 | Directional spreading at spectral maximum | A spectral analysis wave parameter. | 2018-07-17 |
| S0600077 | Dissimilation rate | The speed with which an organic substance is broken down into simpler molecules in living organisms, releasing energy. | 2017-07-11 |
| S0600207 | Downstream velocity | The rate at which matter, an entity or an object moves downstream, in the direction a current stream or a river flows. | 2018-10-01 |
| S0600130 | Downwelling 2-pi scalar irradiance as energy | The downward hemispherical component of light as electromagnetic radiation energy. | 2017-12-18 |
| S0600126 | Downwelling 2-pi scalar irradiance as photons | The downward component of the flux of photons reaching an hemispherical surface. | 2017-12-18 |
| S0600131 | Downwelling vector irradiance as energy | The downward vertical component of light as electromagnetic radiation energy. | 2017-12-18 |
| S0600127 | Downwelling vector irradiance as photons | The downward vertical component of the flux of photons reaching a surface. | 2017-12-18 |
| S0600148 | Dry weight | The weight of an object or sample after all water has been removed. | 2018-01-10 |
| S0600087 | Dry weight biomass | The weight of both organic and inorganic (i.e. mineral) matter of biological organisms in a given area, volume or mass of environmental matrix after all the water has been removed. This is typically done by baking samples at a temperature low enough to avoid combustion (typically around 60 degrees Celsius) followed by a period in a sealed container containing a desiccant. | 2018-01-10 |
| S0600331 | Duration | The amount of time something lasts. | 2024-05-21 |
| S0600223 | Easting | Cartesian x co-ordinate of a point relative to a horizontal datum. | 2019-01-25 |
| S0600199 | Eastward Stokes drift velocity | The average eastward velocity when following a fluid parcel as it travels with the fluid flow. It is also defined as the difference between the average Lagrangian flow velocity of a fluid parcel and the average Eulerian flow velocity of the fluid at a fixed position. | 2018-09-14 |
| S0600153 | Eastward velocity | The rate at which matter moves towards the East. | 2018-01-12 |
| S0600249 | Eastward wind stress | The drag force per unit area caused by wind shear towards the compass direction of true east. | 2020-02-25 |
| S0600208 | Echo intensity | A measure of the intensity or strength of the backscattered acoustic signal return per beam and depth cell from an acoustic doppler current profiler (ADCP). | 2018-09-14 |
| S0600164 | Elapsed time | The amount of time passed between two marked events. | 2018-03-04 |
| S0600194 | Elapsed time since 00:00:00 UTC | The time that has passed between the beginning of the day at 00:00:00Z and the timestamped event. | 2018-09-10 |
| S0600165 | Electric current | A flow of charged particles. | 2018-03-04 |
| S0600298 | Electrical conductivity | The measure of a body of water's capability to pass electrical current. It is directly related to the concentration of dissolved ions in the water, such as chlorides, sulfides and carbonate compounds. The more ions that are present, the higher the conductivity of the water. It can be used to calculate practical salinity. | 2022-10-19 |
| S0600303 | Energy level | A measure of the intensity of echo return from an altimeter or similar acoustic device. Energy level ranges from 0 to 1 where 1 represents full saturation of the receiver. An energy level of 0.707 (square root of 2) is the theoretical perfect level as it represents the energy of a pure sine wave with an amplitude utilising the maximum dynamic range of the receiver. | 2023-01-23 |
| S0600039 | Enrichment | The change in the relative abundances of the isotope of a given element relative to a known abundance either in the past geological record or used as a tracer in biological and chemical process rate measurements. | 2015-09-02 |
| S0600058 | Enrichment with respect to 112Cd/110Cd in NIST SRM 3108 | Deviation of the 112Cd/110Cd isotopic ratio of a sample relative to the standard solution SRM 3108, a reference material for cadmium (Cd) developed by the US National Institute of Standards and Technology. It is defined as delta(112/110Cd)NIST =([112Cd/110Cd]sample/[112Cd/110Cd]NIST)-1)×1000. One delta unit represents a one part per 1,000 deviation from the NIST standard composition. | 2017-08-10 |
| S0600059 | Enrichment with respect to 114Cd/110Cd in NIST SRM 3108 | Deviation of the 114Cd/110Cd isotopic ratio of a sample relative to the standard solution SRM 3108, a reference material for cadmium (Cd) developed by the US National Institute of Standards and Technology. It is defined as delta(114/110Cd)NIST =([114Cd/110Cd]sample/[114Cd/110Cd]NIST)-1)×1000. One delta unit represents a one part per 1,000 deviation from the NIST standard composition. | 2017-08-10 |
| S0600057 | Enrichment with respect to 138Ba/134Ba in NIST SRM 3104a | Deviation of the 138Ba/134Ba isotopic ratio of a sample relative to the standard solution SRM 3104a, a reference material for Barium (Ba) developed by the US National Institute of Standards and Technology, defined as delta(138/134Ba)NIST =([138Ba/134Ba]sample/[138Ba/134Ba]NIST)-1)×1000. One delta unit represents a one part per 1,000 deviation from the NIST standard composition. | 2017-08-10 |
| S0600048 | Enrichment with respect to 143Nd/144Nd in the CHondritic Uniform Reservoir (CHUR) | Departure of the isotope ratio 143Nd/144Nd from the CHondritic Uniform Reservoir (CHUR) evolution line. | 2016-02-01 |
| S0600175 | Enrichment with respect to 176Hf/177Hf in the CHondritic Uniform Reservoir (CHUR) | Departure of the isotope ratio 176Hf/177Hf from the CHondritic Uniform Reservoir (CHUR) evolution line. | 2018-04-18 |
| S0600176 | Enrichment with respect to 53Cr/52Cr in NIST SRM 979 | Deviation of the isotope ratio 53Cr/52Cr relative to the international reference material, NIST SRM 979, a chromium isotopic standard. | 2023-08-22 |
| S0600064 | Enrichment with respect to 56Fe/54Fe in IRMM-14 | Deviation of the isotope ratio 56Fe/54Fe relative to the Institute for Reference Materials and Measurements, Belgium (IRMM) 14 standard. | 2017-04-04 |
| S0600063 | Enrichment with respect to 60Ni/58Ni in NIST SRM 986 | Deviation of the 60Ni/58Ni isotopic ratio of a sample relative to the National Institute of Standards and Technology (NIST, USA) standard solution SRM 986. | 2017-03-21 |
| S0600062 | Enrichment with respect to 66Zn/64Zn in IRMM-3702 | Deviation of the isotope ratio zinc-66/zinc-64 relative to the Institute for Reference Materials and Measurements, Belgium (IRMM) 3702 standard. It is defined as delta(66Zn/64Zn)IRMM-3702 =([66Zn/64Zn]sample/[66Zn/64Zn]IRMM-3702)-1)×1000. One delta unit represents a one part per 1,000 deviation from the IRMM-3702 standard composition. | 2022-04-27 |
| S0600060 | Enrichment with respect to 66Zn/64Zn in Lyon JMC 3-0749 | Deviation of the isotope ratio zinc-66/zinc-64 relative to the Lyon standard JMC 3-0749, a reference material for zinc developed at the Ecole Normale Supérieure of Lyon using Johnson-Matthey Company (JMC) metal stock 3-0749. It is defined as delta(66Zn/64Zn)Lyon-JMC =([66Zn/64Zn]sample/[66Zn/64Zn]Lyon-JMC)-1)×1000. One delta unit represents a one part per 1,000 deviation from the Lyon-JMC standard composition. | 2022-04-27 |
| S0600055 | Enrichment with respect to Lyon JMC 3-0749 DEPRECATED | Abundance of an isotope of a given element reported relative to a standard solution developed at the Ecole Normale Supérieure of Lyon using Johnson-Matthey Company (JMC) metal stock 3-0749 and known as the 'Lyon' standard for zinc. | 2018-01-23 |
| S0600282 | Enrichment with respect to VCDT | The change in the relative abundance of an isotope of a given element relative to its relative abundance in the Vienna Canyon Diablo Troilite (VCDT) international measurement standard, also known as IAEA-S-1 and formerly known as NZ-1 (NIST 8554), a reference material for relative sulfur isotope ratio measurements. | 2022-02-17 |
| S0600065 | Enrichment with respect to VSMOW | The change in the relative abundance of an isotope of a given element relative to the reference abundance measured in Vienna Standard Mean Ocean Water (VSMOW). | 2017-04-25 |
| S0600053 | Enrichment with respect to Vienna Pee Dee Belemnite (VPDB) | The change in the relative abundance of an isotope of a given element relative to the reference abundance measured in Vienna Pee Dee Belemnite. | 2016-05-01 |
| S0600066 | Enrichment with respect to the VSMOW-SLAP scale | The change in the relative abundance of an isotope of a given element relative to the value given on a scale formed by the reference materials Vienna Standard Mean Ocean Water (VSMOW) and Standard Light Antarctic Precipitation (SLAP). | 2017-04-25 |
| S0600260 | Equivalent spherical diameter | The diameter of a spherical particle of equivalent volume which will give identical geometric, optical, electrical or aerodynamic behaviour to that of the particle (non-spherical) being examined, sometimes referred to as the Stokes diameter for particles in non-turbulent flows (Source: IUPAC (1990), https://doi.org/10.1351/pac199062112167). | 2020-11-04 |
| S0600210 | Error velocity | The difference between two independent estimates of vertical velocity derived for each beam pair of an acoustic doppler current profiler (ADCP). | 2018-09-14 |
| S0600009 | Evacuation rate | The rate at which an organism disposes of a substance as solid waste. | 2006-02-17 |
| S0600049 | Excess activity | Difference between the measured activity of a radioactive isotope and the activity of that isotope predicted from equilibrium in-situ decay of its parent in a decay scheme. This difference is used as the basis for radiometric dating. | 2022-04-27 |
| S0600010 | Expression | Indication of whether or not a specified gene is present in an organism. | 2006-02-17 |
| S0600119 | Forward light scatter pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600268 | Friction velocity | Also know as shear velocity, friction velocity is a way of expressing shear stress in units of velocity. It is defined as the square root of shear stress divided by fluid density. It is used in fluid mechanics to compare true velocities to a velocity that relates to shear between layers of flow. | 2021-03-16 |
| S0600074 | Fugacity | The effective partial pressure of a gas allowing for the non-ideal nature of the gas phase. | 2017-06-29 |
| S0600075 | Fugacity anomaly (water - air) | The difference between the fugacity of a gas in a sample in equilibrium with water minus the fugacity of this gas in an air sample. | 2017-06-29 |
| S0600310 | Gamma radiation dose | A measure of the amount of radioactive (gamma ray) energy absorbed by a target. | 2023-06-26 |
| S0600177 | Gas tension | The partial pressure of gases dissolved in a medium such as blood or seawater. | 2018-05-23 |
| S0600140 | Global standard stratigraphic age | Unavailable | 2017-12-19 |
| S0600192 | Grain-size | A term used in sedimentology and size distribution analysis of granular material in general to refer to the diameter of individual particles. | 2018-07-23 |
| S0600011 | Grazing coefficient | The proportion of a substance or biomass removed per unit time through being eaten. | 2006-02-17 |
| S0600124 | Green fluorescence pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600215 | Gross production rate | The rate at which an entity (chemical, biological) is produced over time in a system inclusive of any amount lost from the system. | 2018-10-03 |
| S0600012 | Growth coefficient | The increase in biomass of an organism per unit time. | 2006-02-17 |
| S0600013 | Growth efficiency | The amount of new biomass produced per unit of organic C substrate assimilated. | 2006-02-17 |
| S0600014 | Gut pigment content | The quantity of plant pigments in the gut of an organism. | 2006-02-17 |
| S0600264 | Height | The vertical dimension of an object. | 2020-11-30 |
| S0600166 | Height (spatial coordinate) | The vertical location of an object or an observation in a water body or in the atmosphere expressed as the distance above a specified datum. | 2018-03-14 |
| S0600204 | Horizontal transport rate | The rate at which matter moves along the horizontal. | 2018-09-14 |
| S0600244 | Horizontal visibility | Maximum distance at which an observer can see and identify an object lying close to the horizontal plane on which he or she is standing. (source: AMS glossary, 20200219) | 2020-02-19 |
| S0600302 | Horizontal visibility (ESAS code) | A one-character string used by European Seabirds At Sea (ESAS) to classify ranges of horizontal visibility. | 2022-11-29 |
| S0600246 | Horizontal visibility (WMO code) | An integer code used to classify the horizontal visibility. | 2020-02-19 |
| S0600156 | Identifier | A language-independent label that uniquely identifies an object within an identification system. | 2018-01-30 |
| S0600137 | Irradiance as photons | Radiative photon flux incident on a surface. | 2017-12-19 |
| S0600266 | Latent heat flux | The quantity of energy per unit area per unit time lost from the ocean surface resulting in ocean cooling that is subsequently released to warm the atmosphere when the vapour condenses to form clouds. | 2021-03-13 |
| S0600221 | Latitude north | Angular distance from the equator along a meridian of the Earth's surface, ranging from -90deg at the South Pole to 90deg at the North Pole. | 2019-01-25 |
| S0600015 | Length | The longest horizontal dimension of an object | 2006-02-17 |
| S0600101 | Length (Standard Length) | A standard measurement used in biometric science, in particular fish biometrics. | 2017-11-30 |
| S0600097 | Length (culmen) DEPRECATED | Code deprecated on 2022/07/18; use the term defined in the S12 vocabulary to identify sub-components or body parts of biological entities. Previous description was: A standard measurement in bird biometrics referring to the distance along the main axis of the upper margin of the beak or bill. | 2022-07-18 |
| S0600149 | Length (expressed as pixels) | The longest horizontal dimension of an object captured in a digital image and measured in number of pixels. | 2021-10-14 |
| S0600261 | Length (fork length) | A standard body length measurement used in fish biometric studies for fishes with forked tails and taken as the distance measured from the tip of the snout in a straight line to the posterior end of the shortest caudal rays in the center of the fork. | 2020-11-26 |
| S0600096 | Length (from the front of the eye to the tip of the telson) | The distance along the main axis between a point just in front of the eye and the end of the rear-most segment of the body of certain invertebrates (e.g. crustaceans). | 2017-11-29 |
| S0600098 | Length (head) DEPRECATED | Code deprecated on 2022/07/18; use the term defined in the S12 vocabulary to identify sub-components or body parts of biological entities. Previous description was: A standard measurement used in biometric science, in particular bird biometrics. | 2022-07-18 |
| S0600095 | Length (metasome) | The distance along the main axis of the posterior region of the body of certain invertebrates. | 2017-11-29 |
| S0600317 | Length (precaudal) | A standard body length measurement used in fish biometric studies taken as the distance measured from the tip of the snout in a straight line to the caudal peduncle. | 2023-10-19 |
| S0600094 | Length (prosome) | The distance along the main axis of the anterior region of the body of certain invertebrates. | 2017-11-29 |
| S0600263 | Length (second dorsal length) | A body length measurement used for ratfish in fish biometric studies and taken as the distance measured from the snout to the posterior edge of the posterior lobe of the second dorsal fin. | 2020-11-26 |
| S0600099 | Length (tarsus) DEPRECATED | Code deprecated on 2022/07/18; use the term defined in the S12 vocabulary to identify sub-components or body parts of biological entities. Previous description was: A standard measurement used in biometric science, in particular bird biometrics. | 2022-07-18 |
| S0600262 | Length (total length) | A standard body length measurement used in biometric studies and taken as the longest distance along the main axis. In fish biometrics, this is the distance from the tip of the snout in a straight line to the posterior end of the caudal fin. | 2020-11-26 |
| S0600100 | Length (wing) DEPRECATED | Code deprecated on 2022/07/18; use the term defined in the S12 vocabulary to identify sub-components or body parts of biological entities. Previous description was: A standard measurement used in biometric science, in particular bird or insect biometrics. | 2022-07-18 |
| S0600229 | Likelihood category of death from fishing by-catch | Term indicating the probability (for example: not/impossible, possible, probable, likely, definitely, unknown) that a biological organism died of accidental by-catch from fishing activities. | 2022-04-27 |
| S0600228 | Likelihood category of death from natural causes | Term indicating the probability (for example: not/impossible, possible, probable, likely, definitely, unknown) that a biological organism died of natural causes. | 2022-04-27 |
| S0600231 | Likelihood category of death from predation | Term indicating the probability (for example: not/impossible, possible, probable, likely, definitely, unknown) that a biological organism died following a predatory attack. | 2022-04-27 |
| S0600230 | Likelihood category of death from ship strike | Term indicating the probability (for example: not/impossible, possible, probable, likely, definitely, unknown) that a biological organism died following a collision with a ship. | 2022-04-27 |
| S0600044 | Lipid-normalised concentration DEPRECATED | Term deprecated on 17May2022; the property "Concentration" should be used instead and combined with new S02 for lipid-normalised concentrations. Original description was: The amount of a specified substance in a unit amount of another substance or matrix corrected for variation in lipid content. | 2022-05-17 |
| S0600255 | Location (geographic coordinates) | A location relative to the surface of the Earth, or other planetary or stellar body, represented by a point, line, arc, or any other type of polygon, and defined by encoding the coordinates of the location in a known Coordinate Reference System. Where possible, the Coordinate Reference System used should be specified elsewhere in the metadata by a term from a well defined and managed register such as the European Petroleum Survey Group (EPSG) Geodetic Parameter Dataset. | 2020-10-20 |
| S0600061 | Log ligand binding strength | The logarithmic value of the stability constant for the formation of a complex formed by the interaction of a metal ion with a ligand in solution. | 2017-02-23 |
| S0600222 | Longitude east | Angular distance from the Prime Meridian along a parallel of the Earth's surface, ranging from 0deg to 180deg to the east, and 0deg to -180deg to the west. | 2019-01-25 |
| S0600336 | Magnetic flux (x component) | The x component of the measure of the total magnetic field which passes through a given surface. | 2024-11-05 |
| S0600337 | Magnetic flux (y component) | The y component of the measure of the total magnetic field which passes through a given surface. | 2024-11-05 |
| S0600042 | Mass | The amount of a specified substance. | 2015-09-02 |
| S0600286 | Mass concentration | The mass of a substance or consituent divided by the volume of the mixture, expressed as mass per unit volume. | 2022-05-20 |
| S0600237 | Mass depth | Cumulative mass per unit surface of a medium or succession of media along a vertical path. | 2019-04-09 |
| S0600040 | Mass ratio | The calculated ratio of the amount of two specified substances. | 2015-09-02 |
| S0600324 | Mesh size | The dimension (as a length) of the holes or open spaces between the regularly spaced strands of material that make up e.g. a plankton or fishing net, or sieves used for benthos or sediment studies. | 2024-03-14 |
| S0600073 | Mole fraction | Ratio of the amount expressed in moles of a component divided by the total number of moles of all constituents in a mixture. | 2017-06-29 |
| S0600071 | Mole fraction at 100% humidity | Ratio of the amount expressed in moles of a component divided by the total number of moles of all constituents in an air sample at 100% humidity (sometimes also labelled 'wet air'). | 2017-06-29 |
| S0600072 | Mole fraction in dry air | Ratio of the amount expressed in moles of a component divided by the total number of moles of all constituents in an air sample after removal of water vapour. | 2017-06-29 |
| S0600157 | Name | A language-dependent label that identifies an object. | 2018-01-31 |
| S0600216 | Net production rate | The rate at which the amount of an entity (chemical, biological) changes over time in a system. It is the resultant of the amount produced minus the amount lost or consumed. | 2018-10-03 |
| S0600291 | Net upward flux | Rate of transfer through a surface or a substance in an upward direction, positive values indicating a net upward flow and negative values indicating a net downward flow. | 2022-06-13 |
| S0600294 | Net upward flux (into atmosphere) | Rate of transfer through a surface in contact with the atmosphere in an upward direction, positive values indicating a net upward flow into the atmosphere and negative values indicating a net downward flow from the atmosphere. | 2022-07-11 |
| S0600144 | Net vector irradiance as energy | The difference between downwelling vector irradiance as energy and upwelling vector irradiance as energy. | 2017-12-21 |
| S0600235 | Nominal concentration | Term used to indicate that the value is an approximation of the real concentration of a substance in a solution. | 2019-03-26 |
| S0600135 | Normalised water-leaving radiance | Approximately the radiance that would exit the ocean in the absence of the atmosphere and with the sun at the zenith. | 2017-12-19 |
| S0600224 | Northing | Cartesian y co-ordinate of a point relative to a horizontal datum. | 2019-01-25 |
| S0600200 | Northward Stokes drift velocity | The average northward velocity when following a fluid parcel as it travels with the fluid flow. It is also defined as the difference between the average Lagrangian flow velocity of a fluid parcel and the average Eulerian flow velocity of the fluid at a fixed position. | 2018-09-14 |
| S0600154 | Northward velocity | The rate at which matter moves towards the North. | 2018-01-12 |
| S0600250 | Northward wind stress | The drag force per unit area caused by wind shear towards the compass direction of true north. | 2020-02-25 |
| S0600016 | Number of clones | A count of genetically identical organisms | 2006-02-17 |
| S0600234 | Nutritional status category | Term (free text or from a controlled vocabulary) indicating the nutritional status or emaciation score of biological organisms. | 2019-03-16 |
| S0600256 | One-way travel time | The time taken for an acoustic signal to travel from its source to a reflecting or refracting surface. | 2020-10-20 |
| S0600122 | Orange fluorescence pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600328 | Orientation (horizontal) | The horizontal angle in which the specified entity is facing, for example the nose or bow of a platform, or the orientation of a sensor or sampling device. In mobile objects this refers to the rotation around the vertical axis which can also be known as yaw or a heading. | 2024-04-18 |
| S0600327 | Orientation (pitch) | Rotation around the transverse or lateral (side-to-side) axis. The pitch axis passes through the platform from wingtip to wingtip, or from port to starboard. Pitch changes the vertical direction in which the nose or bow of the platform is pointing; for example, a positive pitching motion raises the nose or bow and lowers the tail or stern. | 2024-04-18 |
| S0600326 | Orientation (roll) | Rotation around the longitudinal (front-to-back) axis. The roll axis passes through the platform from nose to tail, or from bow to stern. A roll motion is an up and down movement of the wings or sides of the platform. | 2024-04-18 |
| S0600330 | Orientation (tilt) | The angle between true vertical and the vertical axis of the framework to which one or more sensors are attached. | 2024-05-07 |
| S0600079 | Oxidation rate | The speed at which a chemical species increases its oxidation number by losing electrons or, in organic chemistry, gaining oxygen or losing hydrogen. Oxidation is coupled with reduction in redox reactions. | 2017-07-11 |
| S0600295 | POC/Th-234 ratio | The ratio of particulate organic carbon (POC) concentration to thorium-234 activity. Thorium is insoluble in seawater and is scavenged by particles as they form and/or sink through the water column. This causes a radioactive disequilibrium between 238U and 234Th in the upper water column, which is proportional to the numbers of particles exported. The POC/Th-234 ratio is hence used to estimate particle and elemental export fluxes. | 2022-10-10 |
| S0600047 | Partial pressure | The pressure exerted by a gas as part of a gas mixture. | 2015-11-12 |
| S0600150 | Peak height | The maximum value in a flow cytometry pulse record. | 2018-01-11 |
| S0600151 | Period | The interval of time between successive occurrences of an oscillatory or cyclic phenomenon. | 2018-01-12 |
| S0600189 | Period at first negative spectral moment | A mean wave period derived using spectral moments of order zero and -1, and defined as m-1/m0. | 2018-07-17 |
| S0600143 | Period at first spectral moment | A mean wave period derived from spectral moments of order zero and 1, and defined as m0/m1. It corresponds to the inverse of mean frequency. | 2018-07-17 |
| S0600225 | Period at maximum recorded height | A wave parameter defined as the period of the highest wave in a record. | 2019-02-19 |
| S0600145 | Period at second spectral moment | A mean wave period derived from spectral moments of order zero and 2, and defined as sqrt(m0/m2); approximately equivalent to the mean zero-crossing wave period Tz. | 2018-07-17 |
| S0600141 | Period at spectral maximum | A statistical wave parameter defined as the wave period at the peak of the spectrum (i.e. modal period). | 2017-12-20 |
| S0600289 | Photochemical oxygen demand | The amount of oxygen that is needed to oxidise, under the influence of radiant energy (such as light), all dissolved oxidisable chemical material in a water sample. | 2022-05-23 |
| S0600093 | Polymer type | A character string defining a polymer type in a classification. | 2017-11-25 |
| S0600325 | Pore size | The dimension (as a length) of the open spaces in a porous material. | 2024-03-21 |
| S0600196 | Potential erosion depth | The potential elevation eroded from a sediment bed according to the measured properties of the bed and removed material. | 2018-09-04 |
| S0600242 | Potential temperature | The temperature that a parcel of air or water would have if moved adiabatically (i.e. without exchange of heat) to a standard reference pressure. | 2019-06-04 |
| S0600083 | Practical salinity | The quantity of dissolved ions (predominantly salt in seawater) expressed on a scale (PSS-78) based on the conductivity ratio of a seawater sample to a standard KCl solution. | 2017-09-19 |
| S0600315 | Precipitation rate | Depth or thickness of the layer formed by precipitation per unit time. Precipitation is any product of the condensation of atmospheric water vapor that falls to the Earth's surface due to gravitational pull. | 2023-08-25 |
| S0600213 | Presence or absence | Statement of whether an object or a phenomenon is present (boolean true) or absent (boolean false) from an observation. | 2018-09-26 |
| S0600253 | Preserved wet weight | The weight of a biological sample following preservation in formaldehyde (formalin) or ethanol for example. | 2020-05-12 |
| S0600274 | Pressure | Force per unit area applied in the direction perpendicular to a surface. For pressure measurements used to express the depth (vertical coordinate) in a water body use SDN:S06::S0600168. | 2021-06-16 |
| S0600168 | Pressure (spatial coordinate) | The vertical location of an object or an observation in a water body or in the atmosphere expressed as the pressure exerted by the water column or the atmosphere at that depth or altitude. | 2018-03-14 |
| S0600017 | Production rate | The rate at which a substance or an entity is produced. | 2006-02-17 |
| S0600018 | Proportion | A quantified subset of an entity. | 2006-02-17 |
| S0600067 | Proportion by dry weight | A quantified subset of an entity based on dry weight. | 2017-06-28 |
| S0600070 | Proportion by number | A quantified subset of an entity based on counts. | 2017-06-28 |
| S0600068 | Proportion by volume | A quantified subset of an entity based on volume. | 2017-06-28 |
| S0600069 | Proportion by weight or volume | A quantified subset of an entity based on weight or volume; usage of this code should be restricted to situations when it is not possible to know whether weight or volume was used to derive the proportion. | 2017-06-28 |
| S0600171 | Proportion coverage | The quantified subset of an area of substrate covered by an entity. | 2018-03-26 |
| S0600019 | Proportion hatching | The quantified subset of eggs hatching. | 2006-02-17 |
| S0600170 | Proportion necrosis by area | The quantified subset of a biological entity affected by necrosis (i.e. dead tissue) based on surface area. The proportion is often expressed as a percentage. | 2018-03-26 |
| S0600041 | Proportion of total fatty acids | A part or amount considered in relation to the total fatty acids in a sample or entity. A fatty acid being a carboxylic acid with a long aliphatic tail chain. | 2015-09-02 |
| S0600265 | Radial velocity (away from) | The rate at which matter or an object moves away from a reference point along a line connecting the reference point to the moving object or particle of matter. In radar technology it is the component of the target's motion that is along the radar beam. | 2020-12-21 |
| S0600251 | Radius | The distance between the centre of a sphere or a circle and any points on its perimeter. | 2020-05-11 |
| S0600332 | Rate of change | The speed at which a variable changes over a specific period of time. | 2024-05-23 |
| S0600187 | Raw signal (arbitrary scale) | The raw output of a measuring device expressed in arbitrary units that have no absolute meaning without calibration. | 2018-07-06 |
| S0600184 | Raw signal (counts) | The Analog-to-Digital Converter (ADC) count output of a measuring device before conversion to engineering units. | 2018-07-06 |
| S0600186 | Raw signal (current) | The raw current output of a measuring device before conversion to engineering units. | 2018-07-06 |
| S0600185 | Raw signal (frequency) | The raw frequency output of a measuring device before conversion to engineering units. | 2018-07-06 |
| S0600183 | Raw signal (voltage) | The raw voltage output of a measuring device before conversion to engineering units. | 2018-07-06 |
| S0600121 | Red fluorescence pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600078 | Reduction rate | The speed at which a chemical species decreases its oxidation number by gaining electrons or, in organic chemistry, losing oxygen or gaining hydrogen. Reduction is coupled to oxidation in redox reactions. | 2017-07-11 |
| S0600159 | Registered name | A language-dependent label that identifies an object and is registered in a controlled vocabulary system (e.g. registry, thesaurus, dictionary). | 2018-02-01 |
| S0600158 | Registered name identifier | A language-independent opaque label that uniquely identifies a registered name within a controlled vocabulary system (e.g. registry, thesaurus, dictionary). | 2018-02-01 |
| S0600313 | Relative Penis Length Index | An index used in the monitoring of imposex, a condition resulting in the development of a penis and vas deferens in female gastropods when exposed to certain pollutants. The index is calculated as the mean length of female penis divided by mean length of male penis in a population multiplied by 100 (Bryan et al 1986, Gibbs et al 1987, Gibbs 1999). | 2023-07-31 |
| S0600312 | Relative Penis Size Index | An index used to estimate the intensity of imposex, a condition resulting in the development of a penis and vas deferens in female gastropods when exposed to certain pollutants. The index is calculated as the mean length of female penis cubed divided by mean length of male penis cubed multiplied by 100 (Bryan et al 1986, Gibbs et al 1987, Gibbs 1999). | 2023-08-14 |
| S0600020 | Relative abundance | The number of one entity per unit area or per unit volume relative to another. | 2006-02-17 |
| S0600318 | Relative cover | The proportion of an area covered by an entity (e.g. a given species, a specific habitat) relative to the total area covered by all considered entities (e.g. all species or all habitats) independently of total ground coverage. For example proportion of zostera or eelgrass within a surveyed area compared with contributions from all plants within that area. | 2024-02-07 |
| S0600306 | Relative cover category | The proportional coverage of an object or phenomenon divided into class categories like e.g. >75%, <25%, 25-50%. | 2023-02-22 |
| S0600297 | Relative humidity | The ratio of the amount of water vapour in the air compared to the maximum amount of water vapour that can theoretically be held at the air's temperature. | 2022-10-17 |
| S0600323 | Relative humidity DEPRECATED | Deprecated on 13/06/2024: duplicates existing concept. The ratio of the amount of water vapour in the air compared to the maximum amount of water vapour that can theoretically be held at the air's temperature. | 2024-06-13 |
| S0600021 | Relative hybridisation | The proportion of an organism combining with a genetic probe. | 2006-02-17 |
| S0600293 | Relative loss rate | The amount of an entity lost from a system divided by the initial amount of that entity in the system relative to time. | 2022-06-13 |
| S0600285 | Remote sensing reflectance | The water-leaving radiance at a given wavelength, Lw(λ), corrected for bidirectional effects of the air-sea interface and sub-surface light field, and normalised by downwelling solar irradiance, Ed(λ), just above the sea surface (Franz, NASA Goddard Space Flight Center). | 2022-04-26 |
| S0600258 | Richter magnitude scale | The logarithm of the amplitude of seismic waves released during a rupture of Earth's crust (earthquake), recorded by seismographs. Also known as the local magnitude scale (ML), it was developed in 1935 by Charles F. Richter. | 2020-10-20 |
| S0600052 | Riverine discharge | Mass or volume of a substance passing from a river into the sea usually stated over a period of time. | 2016-05-01 |
| S0600239 | Root-mean-square sound pressure | The square root of the mean of the variances of the instantaneous pressure of the sound signal over a given duration. | 2019-04-10 |
| S0600085 | Salinity | The mass of sodium chloride dissolved per unit mass of the water column (definition prior to introduction of PSS-78 Practical Salinity Scale). | 2017-09-19 |
| S0600051 | Saturation | A ratio of the measured concentration of a dissolved element or compund in the water to the maximum amount of that element or compound that will dissolve in the water at that temperature and pressure under stable equilibrium. | 2016-05-01 |
| S0600284 | Saturation state | A measure of the thermodynamic potential for a mineral to form or to dissolve. | 2022-03-28 |
| S0600273 | Sauter mean diameter | An average of particle size determined as the average diameter of a collection of spherical particles that have the same volume/surface area ratio as a particle of interest. | 2021-06-16 |
| S0600022 | Sedimentation flux | The quantity of an entity gravitationally settling through a medium per unit area per unit time. | 2006-02-17 |
| S0600267 | Sensible heat flux | The quantity of heat transferred from water to air per unit area per unit time caused by the difference in temperature between the sea and the air. | 2021-03-13 |
| S0600275 | Sequence number | A number belonging to an ordered list of numbers. | 2021-07-06 |
| S0600243 | Serial number | A number that is one of a series that identifies an object or thing from others in the series. For example, an identifier given to a manufactured part of a product line that uniquely identifies it from other parts produced in that line. | 2019-07-12 |
| S0600092 | Shape class | A character string defining a shape category in a classification. | 2017-11-25 |
| S0600120 | Sideward light scatter pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600105 | Significant wave height | A statistic computed from wave measurements that correspond to the average height of the highest one third of the waves, where the height is defined as the vertical distance from a wave trough to the following wave crest. | 2017-12-07 |
| S0600023 | Size DEPRECATED | Term deprecated on 14-03-2024 because of its ambiguity. Use more specific terms to qualify the size of an object. A randomly-oriented measurement of the dimension of an object. | 2024-03-14 |
| S0600270 | Size category | Terms used in the construction of a complex variable description when the objects of interest need to be grouped according to their size. These categories may be expressed as text (e.g. "small", "large") or size intervals (e.g. ">200um", "20-20um"). It is recommended that the result be constrained by a controlled vocabulary such as [S09] (http://vocab.nerc.ac.uk/collection/S09/current/) for biological objects. | 2021-04-26 |
| S0600089 | Size class | A size interval defined as a character string indicating the lower size limit, the upper size limit and the unit of measurement of the upper and lower limits. | 2017-11-25 |
| S0600139 | Sky radiance as energy | The indirect (sky) radiance measured at a zenith angle between 30 and 50 degrees. | 2017-12-19 |
| S0600238 | Sound pressure level | The pressure caused by a sound wave and expressed as the logarithm of the effective sound pressure to a reference value; also called acoustic pressure level. Unless otherwise specified, pressure is expressed in root-mean-square values and the reference sound pressure is 20 micropascal for sound in air and 1 micropascal for sound in other media. | 2019-04-10 |
| S0600226 | Specimen decomposition stage code | A code from a known classification scale specified elsewhere in the metadata indicating the condition of decomposiion of a biological specimen. | 2019-03-16 |
| S0600107 | Spectral significant wave height | A computationally convenient approximation (square root of the zeroth spectral moment multiplied by 4 or 4 times the wave height standard deviation) to significant wave height. Significant wave height is a statistic computed from wave measurements that correspond to the average height of the highest one third of the waves, where wave height is defined as the vertical distance from a wave trough to the following wave crest. | 2017-12-07 |
| S0600152 | Speed | The rate at which matter moves. | 2018-01-12 |
| S0600245 | Speed (3D resultant) | Speed computed from 3 orthogonal vectors (x, y, z). | 2020-02-19 |
| S0600172 | Surface area | The size of the exposed surface of a 3-dimensional object. | 2018-03-27 |
| S0600259 | Surface elevation | The vertical distance of the surface above (positive values) or below (negative values) a fixed reference point. | 2020-10-20 |
| S0600082 | Temperature | The degree of hotness of an object, a measurement matrix, an environment, expressed against a standard scale. | 2017-09-18 |
| S0600160 | Temperature (IPTS-68) | The degree of hotness expressed against the International Practical Temperature Scale of 1968 (IPTS-68) calibration standard. | 2018-02-15 |
| S0600161 | Temperature (ITS-90) | The degree of hotness expressed against the International Temperature Scale of 1990 (ITS-90) calibration standard. | 2018-02-15 |
| S0600162 | Temperature gradient (vertical) | The rate of change in the degree of hotness along the vertical. | 2018-07-24 |
| S0600335 | Topographic height | The measurement of the elevation of the Earth's surface above a datum. | 2024-09-12 |
| S0600283 | Total alkalinity | The acid-neutralising capacity of solutes in an aqueous system or sample. | 2022-03-22 |
| S0600134 | Total water radiance | The total radiance above the water surface measured at a nadir angle between 30 and 50 degrees. | 2017-12-19 |
| S0600269 | Transparency class | A character string defining the transparency, opacity or translucency of an object in a classification. | 2021-04-25 |
| S0600174 | Turbidity | An expression of the optical properties of a liquid that causes light rays to be scattered and absorbed rather than transmitted in straight lines through a sample. (ASTM, 2003a) | 2018-04-16 |
| S0600024 | Turnover rate | The rate at which a substance or an entity is consumed. | 2006-02-17 |
| S0600257 | Two-way travel time | The time taken for an acoustic signal to travel from its source to a reflecting or refracting surface and back to a receiver. | 2020-10-20 |
| S0600091 | Type class | A character string defining a type category in a classification. | 2017-11-25 |
| S0600193 | Unidirectivity index | A directional wave spectrum parameter defined by Barstow et al (1991) indicating the directional homogeneity of the wave field; UI=1 if all mean wave directions are aligned. | 2018-07-23 |
| S0600046 | Uptake rate | The speed with which a substance is taken in by cellular organisms or organs. | 2015-09-29 |
| S0600202 | Upward velocity | The rate at which matter moves along the vertical, in an upwards direction. | 2018-09-14 |
| S0600133 | Upwelling 2-pi scalar irradiance as energy | The upward hemispherical component of light as electromagnetic radiation energy. | 2017-12-18 |
| S0600128 | Upwelling 2-pi scalar irradiance as photons | The flux of photons reaching a downward-looking hemispherical surface. | 2017-12-18 |
| S0600138 | Upwelling radiance as energy | The radiative energy emitted upward from a source per unit of solid angle of a beam per unit area perpendicular to the beam. | 2017-12-19 |
| S0600132 | Upwelling vector irradiance as energy | The upward vertical component of light as electromagnetic radiation energy. | 2017-12-18 |
| S0600129 | Upwelling vector irradiance as photons | The upward vertical component of the flux of photons reaching a surface. | 2017-12-18 |
| S0600314 | Vas Deferens Sequence Index | An index used in the monitoring of imposex, a condition resulting in the development of a penis and vas deferens in female gastropods when exposed to certain pollutants. The index is based on a sequence of six identified stages (number 1 to 6) in the development of imposex in female gastropods plus an initial stage (number 0). The index is the mean of the stages observed in a population (Gibbs 1999). | 2023-07-31 |
| S0600309 | Vector velocity error | The error associated to the velocity vector. | 2023-04-21 |
| S0600247 | Velocity along x-axis | The velocity of a phenomenon resolved along the x-axis of a co-ordinate system. | 2020-02-19 |
| S0600248 | Velocity along y-axis | The velocity of a phenomenon resolved along the y-axis of a co-ordinate system. | 2020-02-19 |
| S0600329 | Velocity along z-axis | The velocity of a phenomenon resolved along the z-axis of a co-ordinate system. | 2024-04-24 |
| S0600292 | Vertical attenuation | The proportion of any kind of flux or signal that is lost when absorbed or scattered by a medium along the vertical Z axis. | 2022-06-13 |
| S0600333 | Vertical displacement | The change in position of an object or entity along the y-axis, relative to a particular frame of reference. | 2024-05-23 |
| S0600203 | Vertical speed | The rate at which matter moves along the vertical, either upwards or downwards. | 2018-09-14 |
| S0600163 | Voltage | The difference in electric potential between two points. For the raw signal output as voltage of a measuring device use S0600183 for 'Raw signal (voltage)' | 2018-09-03 |
| S0600025 | Volume | The amount of 3-dimensional space occupied by an object | 2006-02-17 |
| S0600320 | Volume scattering attributable to particles | The radiant intensity of scattered light from a volume element as a function of angle, with the contribution of pure seawater removed, referred to as Beta(p). Determined by calculating the volume scattering of pure seawater and removing it from the total volume scattering coefficient (Beta) to yield the volume scattering attributable to particles only. Units are m-1 sr-1. | 2024-02-28 |
| S0600319 | Volume scattering coefficient | The radiant intensity of scattered light from a volume element as a function of angle, referred to as Beta. When output from an optical backscattering instrument, Beta is calculated by subtracting dark counts from the raw counts, then multiplying by the manufacturer's supplied calibration scale factor. Units are m-1 sr-1. | 2024-02-28 |
| S0600136 | Water-leaving radiance | The radiance leaving the water as determined once the total water radiance, the sky radiance and the downwelling irradiance are known. | 2017-12-19 |
| S0600104 | Wave crest height | The vertical distance between a wave crest (transition between increasing water level to decreasing water level) and the calm sea surface. | 2017-12-07 |
| S0600109 | Wave crest period | Wave period is the time between two successive designated events in the waveform. A wave crest event is the transition between increasing water level to decreasing water level. | 2017-12-07 |
| S0600103 | Wave height | The vertical distance from a wave trough (transition between decreasing water level to increasing water level) to the following wave crest (transition between increasing water level to decreasing water level). | 2017-12-07 |
| S0600116 | Wave level | The instantaneous distance between the water surface at the point of measurement and a fixed datum such as the instrument or calm sea surface. | 2017-12-07 |
| S0600115 | Wave spectral density | The variance of sea surface elevation at a given frequency (wave period reciprocal) in a wave power spectrum. | 2017-12-07 |
| S0600118 | Wave spectrum check factor | The ratio of horizontal displacements to vertical displacements (heave) returned as a quality control check parameter by some wave recorders for each frequency band in the spectrum. | 2017-12-07 |
| S0600117 | Wave steepness | The ratio of the wave height divided by the wavelength. | 2017-12-07 |
| S0600110 | Wavelength | The physical distance between successive wave crests. | 2017-12-07 |
| S0600305 | Wet weight | Also known as fresh weight or undried weight, this is the weight of an object or sample that has not been dried to remove water. | 2023-02-17 |
| S0600088 | Wet weight biomass | The fresh weight of a biological sample including its water content and its organic and inorganic components. | 2017-10-14 |
| S0600188 | Wet weight to dry weight ratio | The calculated ratio between the fresh weight and the weight after drying of a sample. | 2018-07-13 |
| S0600155 | Width | The side-to-side dimension of an object. | 2018-01-18 |
| S0600276 | Width (expressed as pixels) | The side-to-side dimension of the digital representation of an object in a digital image measured in number of pixels. | 2021-10-14 |
| S0600252 | Wind-chill equivalent temperature | Apparent temperature ("feels-like temperature") which would result in the same cooling effect as would be calculated from combined effect of air temperature (as per dry bulb air temperature) and wind speed. | 2020-05-11 |
| S0600123 | Yellow fluorescence pulse shape area DEPRECATED | Code deprecated on 19/03/2018. Use 'Area' | 2018-03-24 |
| S0600108 | Zero-crossing period | A wave statistic parameter. Wave period is the time between two successive designated events in the waveform. Zero-crossing is an event where the waveform crosses the zero axis formed by the record average level in a given direction. Normally this crossing is from negative to positive known as an up-crossing. | 2018-07-17 |
| S0600191 | Zero-crossing wave height | Wave height derived from zero-crossing wave analysis and defined as the vertical distance between the lowest and the highest value within the wave period defined by two consecutive zero-up or zero-down-crossing points in the wave record. | 2018-07-18 |
| S0600280 | pH (NBS scale) | A measure of acidity based on the National Bureau of Standards' operational pH scale which denotes the negative of the common logarithm of the free proton (hydrogen ion) activity, -log ag. | 2021-11-01 |
| S0600278 | pH (free scale) | A measure of acidity based on the free proton (hydrogen ion) concentration. | 2021-11-01 |
| S0600279 | pH (seawater scale) | A measure of acidity based on the free proton (hydrogen ion) concentration plus hydrogen sulfate ion concentration plus fluoride ion concentration. | 2021-11-01 |
| S0600277 | pH (total scale) | A measure of acidity based on the free proton (hydrogen ion) concentration plus hydrogen sulfate ion concentration. | 2021-11-01 |
| S0600281 | pH (unspecified scale) | A measure of acidity where the scale is either unknown or not specified. | 2021-11-08 |
| S0600180 | sediment DEPRECATED | Physical entity consisting of disaggregated minerals or mineraloids. | 2018-07-05 |
| S0600182 | sediment bedding and lamination DEPRECATED | The physical structure of sediments. | 2018-07-05 |
| S0600181 | sediment bioturbation DEPRECATED | The reworking of sediments by animals or plants. | 2018-07-05 |
