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Vocabulary

Climate and Forecast Area Types

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URI http://vocab.nerc.ac.uk/collection/P29/current/
DescriptionTerms used to describe the characteristics of regions of the Earth's Surface or their representation in a numerical simulation in the CF metadata conventions for data stored in NetCDF.
CreatorClimate and Forecast Standard Names Committee
Modified2020-06-23
Version Info10
Identifier P29
Register Manager British Oceanographic Data Centre
Register Owner Climate and Forecast Standard Names Committee
Members
Identifier PrefLabel Definition Date
all_area_types all_area_types 2013-01-08
bare_ground bare_ground 2013-01-08
cfbuvegs burnt_vegetation 2013-07-11
c3plfuty c3_plant_functional_types A plant that utilizes the C3 carbon fixation pathway as the sole mechanism to bind CO2 before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2013-07-11
c4plfuty c4_plant_functional_types A plant that utilizes the C4 carbon fixation pathway in which the CO2 is first bound to a compound containing four carbon atoms before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2013-07-11
clear_sky clear_sky 2013-01-08
cloud cloud 2013-01-08
cfcropss crops The definition of "crops" is model dependent, for example, some models may include fruit trees as crops. 2013-07-11
ATCC3PFT crops_of_c3_plant_functional_types The definition of "crops" is model dependent, for example, some models may include fruit trees as crops. A "c3 plant" is one that utilizes the C3 carbon fixation pathway as the sole mechanism to bind CO2 before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
ATCC4PFT crops_of_c4_plant_functional_types The definition of "crops" is model dependent, for example, some models may include fruit trees as crops. A "c4 plant" is one that utilizes the C4 carbon fixation pathway in which the CO2 is first bound to a compound containing four carbon atoms before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
cfdustaa dust_aerosol An area_type of "dust_aerosol" indicates that dust aerosol is present at some level within the atmospheric column above an area of the surface of the Earth. 2015-07-08
cfbmfire fire An area_type of "fire" indicates that biomass fire, either smouldering, flaming or both, is present. 2015-07-08
floating_ice floating_ice All ice floating on water including lake-ice, sea-ice, ice-shelves and icebergs. 2013-01-08
cfat5fis floating_ice_shelf An area type of "floating ice shelf" indicates where ice shelves are present. Ice shelves are the component of ice sheets that flow over the ocean. 2017-01-24
ATV9FRFW fresh_free_water An area type of "fresh_free_water" means a free interface between freshwater and the atmosphere without vegetation or other obstructions. 2018-08-06
cfat5gis grounded_ice_sheet An area type of "grounded ice sheet" indicates where the ice sheet rest over bedrock and is thus grounded. It excludes ice-caps, glaciers and floating ice shelves. 2017-01-24
cfherbvg herbaceous_vegetation Herbaceous plants are plants with very flexible stems. Their leaves and stems die down to soil level at the end of every growing season. Herbaceous plants can be annual, biennial or perennial. 2018-07-10
ATV9IASL ice_and_snow_on_land The area type "ice_and_snow_on_land" means ice in glaciers, ice caps, ice sheets (grounded and floating shelves), river and lake ice, any other ice on a land surface, such as frozen flood water, and snow lying on such ice or on the land surface. 2018-08-06
cficfrla ice_free_land 2013-07-11
ice_free_sea ice_free_sea 2013-01-08
ATV9IOLA ice_on_land The area type "ice_on_land" means ice in glaciers, ice caps, grounded ice sheets (grounded and floating shelves), river and lake ice, and any other ice on a land surface, such as frozen flood water. This is distinct from the area type 'land ice' which has a narrower definition. 2018-08-06
cfat5ish ice_sheet An area type of "ice sheet" indicates where ice sheets are present. It includes both grounded ice sheets resting over bedrock and ice shelves flowing over the ocean, but excludes ice-caps and glaciers (in contrast to land_ice, which includes all components). 2017-01-24
lake_ice_or_sea_ice lake_ice_or_sea_ice Floating ice excluding ice-shelves and icebergs. 2013-01-08
land land 2013-01-08
land_ice land_ice "Land ice" means glaciers, ice-caps, grounded ice sheets resting on bedrock and floating ice-shelves. 2017-02-21
CFA4MFSI melt_pond_free_sea_ice The area occupied by type "sea_ice" is the sum of the areas of types "sea_ice_melt_pond" and "melt_pond_free_sea_ice". 2016-05-17
cfnatgra natural_grasses "Natural grasses" means grasses growing in areas of low productivity, often situated on rough or uneven ground. This can include rocky areas, briars and heathland. 2018-03-13
ANGC3PFT natural_grasses_of_c3_plant_functional_types "Natural grasses" means grasses growing in areas of low productivity, often situated on rough or uneven ground. This can include rocky areas, briars and heathland. A "c3 plant" is one that utilizes the C3 carbon fixation pathway as the sole mechanism to bind CO2 before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
ANGC4PFT natural_grasses_of_c4_plant_functional_types "Natural grasses" means grasses growing in areas of low productivity, often situated on rough or uneven ground. This can include rocky areas, briars and heathland. A "c4 plant" is one that utilizes the C4 carbon fixation pathway in which the CO2 is first bound to a compound containing four carbon atoms before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
cfpastur pastures Pastures are assumed to be anthropogenic in origin. They include anthropogenically managed pastureland and rangeland. 2017-01-24
ATPC3PFT pastures_of_c3_plant_functional_types Pastures are assumed to be anthropogenic in origin. They include anthropogenically managed pastureland and rangeland. A "c3 plant" is one that utilizes the C3 carbon fixation pathway as the sole mechanism to bind CO2 before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
ATPC4PFT pastures_of_c4_plant_functional_types Pastures are assumed to be anthropogenic in origin. They include anthropogenically managed pastureland and rangeland. A "c4 plant" is one that utilizes the C4 carbon fixation pathway in which the CO2 is first bound to a compound containing four carbon atoms before photosynthesis reactions take place. All trees are C3 type. Grasses and crops can be C3 or C4. 2018-03-13
CFAT10PF permafrost An area type of "permafrost" indicates where soil or rock has remained at a temperature at or below zero degrees Celsius throughout the seasonal cycle for two or more years. 2020-06-22
cfat5psl primary_and_secondary_land "Primary and secondary land" is land that is not in use as crop land or pasture land, including forests, grasslands, bare ground and vegetated wetlands. "Primary land" is land that has not undergone lulcc (land use or land cover change) due to human disturbance. "Secondary land" is land that has previously been used for agriculture, urban development or logging and has subsequently been abandoned. Reference: Hurtt et al. (2011), Climatic Change, 109 - 117, Harmonization of land-use scenarios for the period 1500–2100: 600 years of global gridded annual land-use transitions, wood harvest, and resulting secondary lands, doi: 10.1007/s10584-011-0153-2. "Primary and secondary land" refers to land use or management, rather than to specific categories of vegetation cover, e.g. the primary and secondary succession of plant species. 2017-02-21
primdetr primary_deciduous_trees A primary forest is a naturally regenerated forest of native species, where there are no clearly visible indications of human activities and the ecological processes are not significantly disturbed. Reference: 'Global Forest Resources Assessment: Terms and Definitions', Forestry Department of Food and Agriculture Organization (FAO) of the United Nations, Rome 2010, www.fao.org/forestry/14241-0d7b74f45b0d2cfef31599cc17e4c28cd.pdf. Deciduous trees lose their leaves seasonally, for example, during winter in high latitudes or following seasonal variations in rainfall. 2013-07-11
primevtr primary_evergreen_trees A primary forest is a naturally regenerated forest of native species, where there are no clearly visible indications of human activities and the ecological processes are not significantly disturbed. Reference: 'Global Forest Resources Assessment: Terms and Definitions', Forestry Department of Food and Agriculture Organization (FAO) of the United Nations, Rome 2010, www.fao.org/forestry/14241-0d7b74f45b0d2cfef31599cc17e4c28cd.pdf. Evergreen trees have leaves in all seasons. 2013-07-11
cfrainac rain An area_type of "rain" indicates that falling rain is present at some level within the atmospheric column above an area of the surface of the Earth. 2015-07-08
sea sea The area occupied by type "sea" is equal to the sum of the areas of types "ice_free_sea" and "sea_ice". 2016-05-17
sea_ice sea_ice The area occupied by type "sea_ice" is the sum of the areas of types "sea_ice_melt_pond" and "melt_pond_free_sea_ice". The area occupied by type "sea" is equal to the sum of the areas of types "ice_free_sea" and "sea_ice". 2016-05-17
CFAT04MP sea_ice_melt_pond The area classified as type "sea_ice" within a grid cell is unaltered when an area of type "sea_ice_melt_pond" is also present because melt ponds occur on top of the existing sea ice. 2016-05-17
ATSIRIDG sea_ice_ridges Sea ice "ridging" occurs in rough sea conditions. The motion of the sea surface can cause areas of sea ice to deform and fold resulting in ridged upper and lower surfaces. The ridges can be as much as twenty metres thick if thick ice is deformed. 2018-03-13
secodetr secondary_deciduous_trees A secondary forest is a forest that has been logged and has recovered naturally or artificially. Reference: 'Report of the ad hoc technical expert group on forest biological diversity', United Nations Convention on Biological Diversity, www.cbd.int/forest/definitions.shtml. Deciduous trees lose their leaves seasonally, for example, during winter in high latitudes or following seasonal variations in rainfall. 2013-07-11
secoevtr secondary_evergreen_trees A secondary forest is a forest that has been logged and has recovered naturally or artificially. Reference: 'Report of the ad hoc technical expert group on forest biological diversity', United Nations Convention on Biological Diversity, www.cbd.int/forest/definitions.shtml. Evergreen trees have leaves in all seasons. 2013-07-11
cfshrubs shrubs The distinction between trees and shrubs is model dependent. 2013-07-11
cfsmokes smoke An area_type of "smoke" indicates that smoke aerosol is present at some level within the atmospheric column above an area of the surface of the Earth. 2015-07-08
snow snow 2013-01-08
cfsnfrla snow_free_land 2015-07-08
cftreess trees The distinction between trees and shrubs is model dependent. All trees are C3 plant functional type. 2013-07-11
ATV9UFZS unfrozen_soil An area type of "unfrozen_soil" means that the soil at the surface is unfrozen. Frozen soil may be present at lower levels within a soil model. 2018-08-06
cfat5urb urban Urban land is comprised of areas where much of the land is covered by structures. Included in this category are cities, towns and villages. Reference: Anderson, J.R, E. E. Hardy, J. T. Roach and R. E. Witmer (1976), A Land Use And Land Cover Classification System For Use With Remote Sensor Data, Appendix C Land Use Definitions, Geological Survey Professional Paper 964, A revision of the land use classification system as presented in U.S. Geological Survey Circular 671, https://www.usbr.gov/lc/socal/reports/SMappend_C.pdf. 2017-02-21
vegetation vegetation 2013-01-08
cfvoascl volcanic_ash_cloud An area_type of "volcanic_ash_cloud" indicates that volcanic ash aerosol is present at some level within the atmospheric column above an area of the surface of the Earth. 2015-07-08
ATWETLND wetland Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season. 2018-03-13