@prefix qudt: . @prefix ssd: . @prefix owl: . @prefix xsd: . @prefix skos: . @prefix rdfs: . @prefix qudt-unit: . @prefix qb: . @prefix dgu: . @prefix ui: . @prefix dct: . @prefix reg: . @prefix qudt-quantity: . @prefix grib2-parameter: . @prefix api: . @prefix vann: . @prefix prov: . @prefix foaf: . @prefix common-unit: . @prefix cc: . @prefix grib2-core: . @prefix void: . @prefix version: . @prefix bufr4-core: . @prefix rdf: . @prefix ldp: . @prefix time: . @prefix qudt-dimension: . @prefix vs: . @prefix common-core: . @prefix dc: . a skos:Concept ; rdfs:label "Mean dynamic topography (MDT)" ; dct:description "Time-mean (over a prescribed time period) of the sea surface height above the geoid"@en ; skos:notation "740" . a skos:Concept ; rdfs:label "Significant wave height" ; dct:description "Average amplitude of the highest 33 out of 100 waves"@en ; skos:notation "100" . a skos:Concept ; rdfs:label "Sea-ice temperature" ; dct:description "Sea-ice temperature measured at defined vertical levels in the ice and any snow on the ice, including the temperature at the ice and snow surfaces. By convention, levels are referenced to the surface of the sea ice, with positive values indicating levels above, and negative values indicating levels below the surface of the sea ice."@en ; skos:notation "405" . a skos:Concept ; rdfs:label "Surface currents" ; dct:description "Ocean Vector motion measured at or near the surface (at stated depth)"@en ; skos:notation "65" . a skos:Concept ; rdfs:label "Si(OH)4 (orthosilicic acid)" ; dct:description "IUPAC: silicic acid, PubChem CID: 14942, CAS Number: 10193-36-9, concentration in sea water"@en ; skos:notation "12320" . a skos:Concept ; rdfs:label "Total alkalinity (TA)" ; dct:description "The amount of acid necessary to titrate all weak bases in seawater"@en ; skos:notation "78" . a skos:Concept ; rdfs:label "Sea-ice lead thickness" ; dct:description "Thickness of new ice within a sea-ice lead."@en ; skos:notation "12333" . a skos:Concept ; rdfs:label "Density" ; dct:description "Density measured by CTD"@en ; skos:notation "732" . a skos:Concept ; rdfs:label "Directional waves" ; dct:description "Waves measured in X,Y,Z directions"@en ; skos:notation "745" . a skos:Concept ; rdfs:label "Ocean suspended sediments concentration" ; dct:description "Variable extracted from ocean colour observation. Indicative of river outflow, re-suspension or pollution of other-than-biological origin. Uncertainty expressed in g/m3 at a specific concentration (e.g., 2 g/m3)."@en ; skos:notation "72" . a skos:Concept ; rdfs:label "Ocean subsurface tracers" ; dct:description "Concentration of trace molecules such as tritium and CFCs"@en ; skos:notation "12246" . a skos:Concept ; rdfs:label "O2-Ar ratio" ; dct:description "Ratio of O2/Ar concentrations"@en ; skos:notation "85" . a skos:Concept ; rdfs:label "NO3- (nitrate)" ; dct:description "Nitrate concentration in sea water."@en ; skos:notation "312" . a skos:Concept ; rdfs:label "Dominant wave direction" ; dct:description "One feature of the ocean wave spectrum. It is the direction of the most energetic wave in the spectrum."@en ; skos:notation "98" . a skos:Concept ; rdfs:label "Surface stokes drift" ; dct:description "The net drift of a fluid parcel at the surface due to surface waves."@en ; skos:notation "12325" . a skos:Concept ; rdfs:label "Sea-ice surface characteristics" ; dct:description "Sea-ice surface characteristics (albedo, meltpond, dust, snow properties, temperature)"@en ; skos:notation "404" . a skos:Concept ; rdfs:label "Sea surface salinity" ; dct:description "Salinity of sea water in the surface layer (upper ~1 m if observed in MW)"@en ; skos:notation "92" . a skos:Collection , reg:Register , ldp:Container ; rdfs:label "Observed variable - measurand (ocean)" ; dct:description "Observed variable - measurand (ocean)" ; dct:modified "2026-01-06T16:52:31.789Z"^^xsd:dateTime ; owl:versionInfo 23 ; skos:member , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ; ldp:hasMemberRelation skos:member . a skos:Concept ; rdfs:label "Ocean dynamic topography (ODT)" ; dct:description "Deviation of sea level from the geoid caused by ocean currents (after corrections for tides and atmospheric pressure effects)"@en ; skos:notation "64" . a skos:Concept ; rdfs:label "Sea surface height anomaly (SSHA)" ; dct:description "Sea surface height anomaly"@en ; skos:notation "77" . a skos:Concept ; rdfs:label "Sea-ice lead width" ; dct:description "Width of a sea-ice lead approximately perpendicular to its long axis."@en ; skos:notation "12332" . a skos:Concept ; rdfs:label "Conductivity" ; dct:description "Conductivity measured by CTD or MicroCAT"@en ; skos:notation "731" . a skos:Concept ; rdfs:label "PO4= (phosphate)" ; dct:description "Phosphate concentration in sea water."@en ; skos:notation "399" . a skos:Concept ; rdfs:label "Chlorophyll a concentration" ; dct:description "Concentration of chlorophyll-a pigment in the surface water [µg l-1]. Indicator of living phytoplankton biomass, extracted from ocean colour observation. Uncertainty is expressed in mg/m3 for a given concentration of 1 mg/m3."@en ; skos:notation "71" . a skos:Concept ; rdfs:label "Wave period" ; dct:description "The time required for two successive wave crests to pass a fixed point, or the time for a single wave crest to travel a distance equal to the length of the wave. This is averaged over a specified period of time."@en ; skos:notation "744" . a skos:Concept ; rdfs:label "Zooplankton biomass and diversity" ; dct:description "Biomass expressed as weight by volume; and diversity of biomass expressed as number of species per unit sample."@en ; skos:notation "12245" . a skos:Concept ; rdfs:label "N2, Ar, O2" ; dct:description ""@en ; skos:notation "84" . a skos:Concept ; rdfs:label "NO2- (nitrite)" ; dct:description "Nitrite concentration in sea water."@en ; skos:notation "311" . a skos:Concept ; rdfs:label "Dissolved organic nitrogen" ; dct:description "Concentration of dissolved organic nitrogen"@en ; skos:notation "69" . a skos:Concept ; rdfs:label "Sea-ice melt pond fraction" ; dct:description "The fraction of an area covered by meltwater on the ice. The term 'puddle' is also used."@en ; skos:notation "12324" . a skos:Concept ; rdfs:label "Sea-ice velocity" ; dct:description "Horizontal displacement of sea ice over a defined time interval, specified as a two-element vector quantity: u and v. Related terms found in the literature are 'Sea-ice motion' and 'Sea-ice drift'."@en ; skos:notation "403" . a skos:Concept ; rdfs:label "Subsurface salinity" ; dct:description "Salinity of seawater"@en ; skos:notation "91" . a skos:Concept ; rdfs:label "pCO2 air-sea flux" ; dct:description "Flux of CO2 from the ocean into the atmosphere"@en ; skos:notation "736" . a skos:Concept ; rdfs:label "Ocean current speed" ; dct:description "Velocity of ocean motion measured at various depth levels"@en ; skos:notation "63" . a skos:Concept ; rdfs:label "Tides" ; dct:description "Periodic change of sea height caused by the gravitational forces exerted by the Moon and the Sun on the Earth"@en ; skos:notation "10080" . a skos:Concept ; rdfs:label "Ocean Surface heat flux" ; dct:description "The exchange of heat, per unit area, crossing the surface between the ocean and the atmosphere. It consists of the turbulent (latent and sensible) and the radiative (short wave and long wave) components."@en ; skos:notation "76" . a skos:Concept ; rdfs:label "Sea-ice stage of development" ; dct:description "Classes of sea ice related to ice age, thickness, strength, and viscosity. The names and definitions of the classes are defined in WMO Sea-Ice Nomenclature (WMO-No. 259)."@en ; skos:notation "12331" . a skos:Concept ; rdfs:label "Water-leaving spectral radiance" ; dct:description "Upward spectral radiance from the ocean surface, i.e. amount of light leaving the ocean per unit area, per wavelength and per solid angle"@en ; skos:notation "89" . a skos:Concept ; rdfs:label "Sea-ice ridge height" ; dct:description "Average height of sea-ice ridges in an area."@en ; skos:notation "12329" . a skos:Concept ; rdfs:label "Diffuse attenuation coefficient (DAC), turbidity" ; dct:description "Indicator of water turbidity and vertical processes in the ocean, extracted from ocean colour observation"@en ; skos:notation "70" . a skos:Concept ; rdfs:label "Wave height" ; dct:description "Average of height (trough to crest) of the waves sampled over a specified time period"@en ; skos:notation "743" . a skos:Concept ; rdfs:label "N2, Ar" ; dct:description "Concentration of dissolved N2 and Ar"@en ; skos:notation "12244" . a skos:Concept ; rdfs:label "pO2" ; dct:description "partial pressure of O2"@en ; skos:notation "549" . a skos:Concept ; rdfs:label "Sea surface wind stress" ; dct:description "The shear force per unit area exerted by wind blowing over the sea surface. The same quantity may be referred in literature as either 'wind stress' or 'ocean wind stress'."@en ; skos:notation "103" . a skos:Concept ; rdfs:label "Coastal sea level (tide)" ; dct:description "Deviation of sea level from local references in coastal zones, caused by local currents and tides (astronomical and wind-induced)"@en ; skos:notation "96" . a skos:Concept ; rdfs:label "Transmissivity" ; dct:description "Measure of the light that passes through the water in relation to the incident light"@en ; skos:notation "408" . a skos:Concept ; rdfs:label "Dissolved organic carbon" ; dct:description "Concentration of dissolved organic carbon"@en ; skos:notation "68" . a skos:Concept ; rdfs:label "Tsunami wave amplitude" ; dct:description "Absolute value of the difference between a particular peak or trough of the tsunami wave and the expected undisturbed sea level at that time."@en ; skos:notation "12323" . a skos:Concept ; rdfs:label "Sea-ice floe size distribution" ; dct:description "The area density distribution of sea-ice floes expressed as the power-law exponent of the distribution of floe areas over a region."@en ; skos:notation "12336" . a skos:Concept ; rdfs:label "C2H6S (dimethylsulfide, DMS)" ; dct:description "Concentration of DMS"@en ; skos:notation "90" . a skos:Concept ; rdfs:label "Sea-ice freeboard" ; dct:description "Elevation of the upper sea-ice surface relative to the sea surface."@en ; skos:notation "402" . a skos:Concept ; rdfs:label "Ocean current direction" ; dct:description "Direction of ocean motion measured at various depth levels"@en ; skos:notation "62" . a skos:Concept ; rdfs:label "pCO2" ; dct:description "Partial pressure of CO2"@en ; skos:notation "735" . a skos:Concept ; rdfs:label "Sea surface mass flux" ; dct:description "Sea surface mass flux"@en ; skos:notation "75" . a skos:Concept ; rdfs:label "Sea-ice stage of melt" ; dct:description "Categories of sea-ice melt that represent the occurrence of puddles (melt ponds), thawholes, flooded ice, and ice condition resulting from current or previous melting. Category names and definitions are defined in WMO Sea-Ice Nomenclature (WMO-No. 259)."@en ; skos:notation "12330" . a skos:Concept ; rdfs:label "Sea-ice ridge concentration" ; dct:description "Fraction of an area of sea-ice occupied by ridges."@en ; skos:notation "12328" . a skos:Concept ; rdfs:label "Sea surface height (SSH, OST)" ; dct:description "Height of the sea surface with respect to the reference ellipsoid"@en ; skos:notation "742" . a skos:Concept ; rdfs:label "Bathymetry" ; dct:description "Bathymetry"@en ; skos:notation "13" . a skos:Concept ; rdfs:label "SiO3= (metasilicate)" ; dct:description "Concentration of dissolved metasilicate"@en ; skos:notation "82" . a skos:Concept ; rdfs:label "Wave directional energy frequency spectrum" ; dct:description "2D variable colloquially referred to as wave spectrum. Describes the wave energy travelling in each direction and frequency band (e.g. 24 distinct azimuth sectors each 15°deg; wide, and 25 frequency bands)."@en ; skos:notation "102" . a skos:Concept ; rdfs:label "Sea surface temperature" ; dct:description "Temperature of the sea water at surface. The 'bulk' temperature refers to the depth of typically 2 m, the 'skin' temperature refers to within the upper 1 mm"@en ; skos:notation "95" . a skos:Concept ; rdfs:label "Sea-ice type" ; dct:description "Variable convolving several factors (age, roughness, density, etc.). Accuracy expressed as number of classes. Actually [ classes^-1 ] is used, so that smaller figure corresponds to better performance as usual."@en ; skos:notation "407" . a skos:Concept ; rdfs:label "Dissolved inorganic carbon (DIC)" ; dct:description "The cumulated concentration of inorganic carbon species (dissolved carbon dioxide, carbonic acid, bicarbonate and carbonate) in solution"@en ; skos:notation "67" . a skos:Concept ; rdfs:label "N2O (nitrous oxide)" ; dct:description "IUPAC: nitrous oxide, PubChem CID: 948, CAS Number: 10024-97-2, concentration in sea water"@en ; skos:notation "12322" . a skos:Concept ; rdfs:label "Sea-ice age" ; dct:description "Age of sea ice since its formation."@en ; skos:notation "12335" . a skos:Concept ; rdfs:label "Sea-ice concentration" ; dct:description "Fraction of an ocean area covered by sea-ice."@en ; skos:notation "401" . a skos:Concept ; rdfs:label "Primary production" ; dct:description "Production of organic matter by 'phytoplankton', microscopic plant-like photosynthetic organisms that live in the water"@en ; skos:notation "74" . a skos:Concept ; rdfs:label "Pressure" ; dct:description "Pressure (depth) measured by CTD."@en ; skos:notation "18" . a skos:Concept ; rdfs:label "Dissolved oxygen" ; dct:description "Concentration of dissolved oxygen (O2) in the water column"@en ; skos:notation "87" . a reg:RegisterItem ; rdfs:label "Observed variable - measurand (ocean)" ; dct:dateAccepted "2020-04-29T14:36:12.698Z"^^xsd:dateTime ; dct:dateSubmitted "2019-10-14T16:36:30.355Z"^^xsd:dateTime ; dct:description "Observed variable - measurand (ocean)" ; dct:modified "2019-11-21T09:08:06.565Z"^^xsd:dateTime ; reg:definition [ reg:entity ; reg:entityVersion ] ; reg:itemClass reg:Register , ldp:Container , skos:Collection ; reg:notation "ObservedVariableOcean" ; reg:register ; reg:status reg:statusStable ; reg:submitter [ foaf:accountName "https://api.github.com/users/kurt-hectic" ; foaf:name "kurt-hectic" ] ; owl:versionInfo 3 . a skos:Concept ; rdfs:label "Iceberg length" ; dct:description "The length of an iceberg above water. If its shape is irregular, then the length is of the largest dimension."@en ; skos:notation "12327" . a skos:Concept ; rdfs:label "Mean sea surface (MSS)" ; dct:description "Time-averaged height (over a prescribed time period) of the ocean surface with respect to the reference ellipsoid"@en ; skos:notation "741" . a skos:Concept ; rdfs:label "Wave 1D energy frequency spectrum" ; dct:description "1D variable colloquially referred to as wave spectrum. Describes the wave energy in each frequency band (e.g. 25 frequency bands) regardless of the direction of propagation."@en ; skos:notation "101" . a skos:Concept ; rdfs:label "Subsurface temperature" ; dct:description "Seawater temperature measured with depth (degrees celsius/kelvin)"@en ; skos:notation "94" . a skos:Concept ; rdfs:label "Sea-ice thickness" ; dct:description "Vertical distance between the bottom and the top of sea ice, excluding snow on ice."@en ; skos:notation "406" . a skos:Concept ; rdfs:label "Fluorescence (DOM)" ; dct:description "Flurometric coloured dissolved Organic matter concentration"@en ; skos:notation "739" . a skos:Concept ; rdfs:label "Snow depth on sea ice" ; dct:description "Vertical distance from the snow surface to the underlying sea-ice surface."@en ; skos:notation "12321" . a skos:Concept ; rdfs:label "pH" ; dct:description "Negative decimal logarithm of the hydrogen ion concentration in seawater, which is a measure of acidity and alkalinity"@en ; skos:notation "79" . a skos:Concept ; rdfs:label "Sea-ice surface albedo" ; dct:description "Hemispherically integrated reflectance of sea ice in the wavelength range of 0.4-0.7 µm (400-700 nm). The sea-ice surface may be bare ice or snow-covered."@en ; skos:notation "12334" . a skos:Concept ; rdfs:label "Total organic phosphorus" ; dct:description "Concentration of dissolved organic phosphorous"@en ; skos:notation "400" . a skos:Concept ; rdfs:label "N2, Ar" ; dct:description "Concentration of dissolved N2 and Ar"@en ; skos:notation "12319" . a skos:Concept ; rdfs:label "Zooplankton (size and/or development stage)" ; dct:description "Aggregate of animal or animal-like organisms in plankton, as protozoans"@en ; skos:notation "733" . a skos:Concept ; rdfs:label "Oil spill cover" ; dct:description "Fraction of an ocean area polluted by hydrocarbons released from ships or off-shore platforms, accidentally or deliberately"@en ; skos:notation "73" . a skos:Concept ; rdfs:label "Ocean subsurface dissolved oxygen concentration" ; dct:description "Concentration of dissolved oxygen"@en ; skos:notation "86" . a skos:Concept ; rdfs:label "Dominant wave period" ; dct:description "The period of the most energetic wave in the ocean wave spectrum"@en ; skos:notation "99" . a skos:Concept ; rdfs:label "Iceberg height" ; dct:description "The height of an iceberg above water."@en ; skos:notation "12326" .