CFSN2203	permafrost_area_fraction		"Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area. It may be expressed as a fraction, a percentage, or any other dimensionless representation of a fraction. Permafrost is soil or rock that has remained at a temperature at or below zero degrees Celsius throughout the seasonal cycle for two or more years.	I
CFSN0354	soil_temperature		Soil temperature is the bulk temperature of the soil, not the surface (skin) temperature. "Soil" means the near-surface layer where plants sink their roots. For subsurface temperatures that extend beneath the soil layer or in areas where there is no surface soil layer, the standard name solid_earth_subsurface_temperature should be used.	M
CFSN0178	tendency_of_bedrock_altitude		The phrase "tendency_of_X" means derivative of X with respect to time. Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level. "Bedrock" is the solid Earth surface beneath land ice, ocean water or soil.	M
CFSN2204	mole_concentration_of_dissolved_organic_nitrogen_in_sea_water		"Mole concentration" means number of moles per unit volume, also called "molarity", and is used in the construction "mole_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". "Dissolved organic nitrogen" describes the nitrogen held in carbon compounds in solution. These are mostly generated by plankton excretion and decay.	I
CFSN2202	permafrost_active_layer_thickness		The quantity with standard name permafrost_active_layer_thickness is the thickness of the layer of the ground that is subject to annual thawing and freezing in areas underlain by permafrost. "Thickness" means the vertical extent of a layer. Permafrost is soil or rock that has remained at a temperature at or below zero degrees Celsius throughout the seasonal cycle for two or more years.	I
CFSN0733	bedrock_altitude_change_due_to_isostatic_adjustment		The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level. "Bedrock" is the solid Earth surface beneath land ice, ocean water or soil. The zero of bedrock altitude change is arbitrary. Isostatic adjustment is the vertical movement of the lithosphere due to changing surface ice and water loads.	M
CFSN0412	region		A variable with the standard name of region contains either strings which indicate a geographical region or flags which can be translated to strings using flag_values and flag_meanings attributes. These strings are standardised. Values must be taken from the CF standard region list.	M
	land_cover_lccs		A variable with the standard name of land_cover_lccs contains strings which indicate the nature of the surface, e.g. cropland_..., tree_... . Each string should represent a land cover class constructed using the Land Cover Classification System (LCCS; Di Gregorio A., 2005, UN Land Cover Classification System (LCCS) - Classification concepts and user manual for Software version 2; available at www.fao.org/DOCREP/003/X0596E/X0596e00.htm). String values should represent the classifiers used to define each class.	M
CFSN0620	ertel_potential_vorticity		The Ertel potential vorticity is the scalar product of the atmospheric absolute vorticity vector and the gradient of potential temperature. It is a conserved quantity in the absence of friction and heat sources [AMS Glossary, http://glossary.ametsoc.org/wiki/Ertel_potential_vorticity]. A frequently used simplification of the general Ertel potential vorticity considers the Earth rotation vector to have only a vertical component. Then, only the vertical contribution of the scalar product is calculated.	M
CFV11S1	area_type		A variable with the standard_name of area_type contains either strings which indicate the nature of the surface e.g. land, sea, sea_ice, or flags which can be translated to strings using flag_values and flag_meanings attributes. These strings are standardised. Values must be taken from the area_type table.	M
CFSN2201	solid_earth_subsurface_temperature		The quantity with standard name solid_earth_subsurface_temperature is the temperature at any depth (or in a layer) of the "solid" earth, excluding surficial snow and ice (but not permafrost or soil). For temperatures in surface lying snow and ice, the more specific standard names temperature_in_surface_snow and land_ice_temperature should be used. For temperatures measured or modelled specifically in the soil layer (the near-surface layer where plants sink their roots) the standard name soil_temperature should be used.	I
CFSN0732	bedrock_altitude		Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level. "Bedrock" is the solid Earth surface beneath land ice, ocean water or soil.	M