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Vocabulary

SeaVoX Vertical Co-ordinate Coverages

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URI http://vocab.nerc.ac.uk/collection/L13/current/
DescriptionTerms used to describe data coverage over the vertical (z) co-ordinate.
CreatorSeaDataNet and MarineXML Vocabulary Content Governance Group
Modified2020-05-21
Version Info5
Identifier L13
Register Manager British Oceanographic Data Centre
Register Owner SeaDataNet and MarineXML Vocabulary Content Governance Group
Members
Identifier PrefLabel Definition Date
AY abyssobenthic The zone of the seabed comprising the ocean floor with a bathymetric depth greater than approximately 2700 metres where the bathyal fauna are replaced by more primitive abyssal fauna. 2013-02-05
AP abyssopelagic water column The water column zone of total darkness extending down to the abyssal sea floor. Typically between depths of approximately 4000 metres and 6000 metres. 2006-11-15
AT atmosphere The envelope of gases surrounding the Earth. 2006-11-15
AB atmospheric boundary layer The region of the atmosphere close enough to the Earth's surface for frictional effects of that surface to be significant. Typically not more than 1 km thick. 2006-11-15
BB bathybenthic The zone of the seabed between the permanent thermocline in the overlying water body and the limit of colonisation by bathyal fauna. It incorporates the lower part of the slope and the ocean floor to around 2700 metres bathymetric depth. It includes several faunal discontinuities. 2020-05-20
BP bathypelagic water column The water column zone illuminated only by bioluminescent organisms. Typically between depths of approximately 1000 metres and 4000 metres. 2006-11-15
NB benthic boundary layer The water column that is significantly influenced by the seabed, which is broader in deep ocean than in shelf seas. Guideline approximation is bottom 10m of oceans and bottom 5% of shelf (<200m) seas. 2006-11-15
CL circalittoral The zone of the seabed dominated by animals. On open coastline this is from bottom of the infralittoral zone to the depth to which storms and waves still influence the seabed (wave-base). 2013-02-05
CO core The central zone of the earth largely composed of solid or molten metal alloys, typically from the centre of the Earth to approximately 2900 km below the surface.. 2006-11-15
CR crust The layer of lithified rock between the unconsolidated sediment and the Moho seismic discontinuity. Typically 5-10 km thick beneath oceans and 60-70 km thick beneath continents. 2006-11-15
DC deep circalittoral The zone of the seabed between the depth to which storms and waves still influence the seabed (wave-base) and the marked break of slope that characterises the offshore limit of the shelf (shelf-break). 2013-02-05
U2 epipelagic water column The water column zone in which for clear water there is adequate light for photosynthesis. Typically from the surface down to a depth of approximately 200 metres. 2006-11-15
ES exosphere The outermost layer of the atmosphere from which atoms can escape into outer space. Lies above the thermosphere from about 400 km in altitude. 2006-11-15
HW hadopelagic water column The zone of the water column occupying ocean trenches, deeper than approximately 6000 metres. 2006-11-15
HX heterosphere The region of the atmosphere where the mixing ratio of gases is differentiated by gravity. Lies above the homosphere, from about 100 km in altitude. 2006-11-15
HP homopause The boundary region between the homosphere and the heterosphere. Typically at about 100 km. 2006-11-15
HS homosphere The region of the atmosphere where gases are fully mixed by diffusion and turbulence. Lies between the surface (0 km) and the base of the heterosphere (at about 100 km). 2006-11-15
IA inapplicable There is no appropriate value 2010-02-26
IL infralittoral The zone of the seabed dominated by macroalgae below the low water mark. It extends to a depth where 1% of the surface illumination reaches the seabed, which varies according to turbidity. 2013-02-05
LI littoral That part of the shore (the fringe of a body of water that has been geologically modified by the action of that body of water past and present) above the low water mark and therefore exposed to the atmosphere at low tide. 2013-02-05
MA mantle The layer of basic (i.e ferromagnesian) solid rock between the core and the crust. Typically from between 5-70 km below the surface to approximately 2900 km below the surface. 2006-11-15
MP mesopause The boundary between the mesosphere and the thermosphere characterised by a temperature minimum. Typically lies somewhere between 80 and 90 km. 2006-11-15
MW mesopelagic water column The water column zone penetrated by light, but in insufficient quantities for photosynthesis. Typically between depths of approximately 200 metres and 1000 metres. 2006-11-15
MS mesosphere The layer of atmosphere overlying the stratospause characterised by decreasing temperature with height, typically from about 50 to about 80 km 2006-11-15
SD soil and sediment The unlithified sediments (of any grain size from silt to boulders) that form a layer between the solid crust and either the atmosphere or the water column. 2010-05-17
SB soil and sediment boundary layer The upper surface (interface plus surficial substrate) of the layer of unlithified sediments (of any grain size from silt to boulders) that form a layer between the solid crust and either the atmosphere or the water column. 2010-05-17
SP stratopause The boundary between the stratosphere and the mesosphere characterised by a temperature maximum. Typically at about 50 km. 2006-11-15
SS stratosphere The layer of the atmosphere from the tropopause to a height of approximately 50 km, characterised by increasing temperature with height. 2006-11-15
TZ thermopause The boundary between the thermosphere and the exosphere. Typically at about 400 km. 2006-11-15
TS thermosphere The atmospheric layer extending between heights of approximately 80 km to approximately 400 km characterised by rising temperature with height and phenomena associated with ionisation. Part of the thermosphere is sometimes termed the ionosphere. 2006-11-15
TP tropopause The boundary between the troposphere and stratosphere, characterized by change in temperature gradient with height from decreasing below to increasing above. May extend over a few km in height. Typically lies somewhere between 10 and 15 km. 2006-11-15
TH troposphere The lowest broad layer of the atmosphere characterised by decreasing avearage temperature with height. Typically from the surface to between 10 and 15 km. 2006-11-15
UK unknown The correct value is not known to, and not computable by, the sender of this data. However, a correct value probably exists. 2006-11-15
U1 upper epipelagic water column The strongly illuminated upper half of the epipelagic zone. Typically from the surface down to a depth of approximately 100 metres. 2006-11-15
US upper slope The zone of steeply-sloping seabed between the shelf-break and the permanent thermocline in the overlying water body. 2013-02-05
WC water column The entire body of water between the bed and the atmosphere. 2006-11-15
NS water column boundary layer The zone of the water column that is significantly influenced by the atmosphere. Typically the top 10m of the water column. 2006-11-15
WS water column skin The zone a few microns thick at the extreme surface of the water column that is sampled by radiometers. 2006-11-15