Notation	Name	Description	Status
165	Groundwater (amount per unit area)	Amount of water present beneath the ground surface per unit a...	stable
166	Groundwater level	Elevation of the water table or piezometric surface of an aqu...	stable
167	Lake area	Area extent of the surface of a lake.	stable
168	Lake level	Elevation of water in an inland body of surface water of sign...	stable
171	Stream discharge	Volume of water flowing through a stream (or channel) cross-s...	stable
172	Stream level	Elevation of the free water surface of a water body flowing i...	stable
174	Well discharge		stable
231	Breaking action-friction coefficient		stable
232	Coastlines	Location of coastlines (Lat/Long)	stable
236	Land cover	Processed from land surface imagery by assigning identified c...	stable
237	Land surface topography	Map of land surface heights.	stable
239	Runway conditions		stable
243	Wetland extent	Fraction of an area flood by water.	stable
245	Soil heat Flux		stable
246	Soil type	Result of the classification of different types of soil withi...	stable
386	Fire fractional cover	Fraction of a land area where fire is occurring.	stable
387	Fire radiative power	Power radiated by the fire occurring within an area.	stable
388	Fire temperature	Temperature of the fire occurring within an area.	stable
389	Land surface temperature	Temperature of the apparent surface of land (bare soil or veg...	stable
410	Lake Surface Temperature	Temperature of the lake surface.	stable
422	CO2 flux	Flux of carbon dioxide from the surface to the atmosphere	stable
423	Biomass	Total amount of vegetation in a reference area	stable
424	Fraction of vegetated land	Fraction of a land area where vegetation is present.	stable
425	Leaf Area Index (LAI)	LAI (Leaf Area Index, LAI) is the total one-sided area of pho...	stable
426	Normalised Difference Vegetation Index (NDVI)	Difference between maximum (in NIR) and minimum (around the R...	stable
427	Vegetation type	Result of the classification of different types of vegetation...	stable
510	Evaporation	Quantity of water evaporated from the soil and plants when th...	stable
527	Soil moisture (in the roots region)	Fractional content of water in a volume of wet soil. Typicall...	stable
528	Soil moisture at surface	Fractional content of water in a volume of wet soil. Surface ...	stable
563	Fraction of Absorbed PAR (FAPAR)	Fraction of PAR absorbed by vegetation (land or marine) for p...	stable
564	Photosynthetically Active Radiation (PAR)	Flux of downwelling photons of wavelength 400-700 nm.	stable
596	Soil temperature	The standard depths for soil temperature measurements are 5, ...	stable
611	Glacier motion	Velocity of the ice measured at the surface of a glacier.	stable
612	Glacier topography	Map of the height of the glacier surface.	stable
613	Ice sheet topography	Map of ice sheet height over land.	stable
627	Depth of snowfall	The vertical depth of freshly fallen snow that has accumulate...	stable
628	Snow cover extent	The area of snow-covered ground, ice, or firn based on the fr...	stable
629	Snow depth	Vertical distance from the snow surface to a stated reference...	stable
630	Snow surface state	Binary product (dry or wet) expressing the presence of liquid...	stable
631	Water equivalent of snow cover	The Vertical depth of the water that would be obtained if the...	stable
725	Lake ice thickness	Vertical distance between the bottom of the ice and the top l...	stable
726	River ice thickness	Vertical distance between the bottom of the ice and the top r...	stable
12007	Presence of snow	A binary observation of the presence of snow cover at the mea...	stable
12008	Water equivalent of snowfall	Vertical depth of the water that would be obtained if the fre...	stable
12009	Glacier mass balance at a point	The result of all processes adding and removing mass from the...	stable
12010	Glacier-wide mass balance	The result of all processes adding and removing mass from the...	stable
12011	Surface accumulation at a point	The mass added to the glacier at a point on its surface expre...	stable
12012	Surface ablation at a point	The mass removed from the glacier at a point on its surface e...	stable
12013	Glacier area	Area enclosed by the projection of the glacier outline onto t...	stable
12014	Permafrost temperature	Ground temperature measured in the permafrost.	stable
12015	Active layer thickness	Thickness of the surface layer of the ground that is subject ...	stable
12252	Water level	Elevation of the free water surface of a water body relative ...	stable
12253	Percolation rate	Flow of a liquid through an unsaturated porous medium, such a...	stable
12254	Recharge rate	Natural or artificial introduction of water into the saturate...	stable
12255	Aquifer volume	Volume of geological formation capable of storing, transmitti...	stable
12256	Hydraulic conductivity	Property of a porous medium or fractured rock which, accordin...	stable
12257	Hydraulic transmissivity	Rate at which water is transferred through a unit width of an...	stable
12258	Porosity	Ratio of the volume of the interstices in a given sample of a...	stable
12259	Effective porosity	Volume of the void spaces through which water or other fluids...	stable
12260	Specific retention	Amount of water held in the soil after gravitational water ha...	stable
12261	Infiltration rate	Flow of water through the soil surface into a porous medium f...	stable
12262	Infiltration capacity	Maximum rate at which water can penetrate the soil matrix per...	stable
12263	Specific capacity (well)	Ratio of discharge of a well to drawdown at equilibrium. [Int...	stable
12264	Specific yield	Ratio of the volume of water which can be drained by gravity ...	stable
12265	Groundwater flow	Volume of groundwater flowing through an aquifer per unit tim...	stable
12266	Storage	(1) Impounding of water in surface or underground reservoirs ...	stable
12267	Total dissolved solids	The concentration of all dissolved substances in water, usual...	stable
12268	Suspended sediment	The component of an unacidified water sample that is retained...	stable
12270	Sediment discharge	Rate of movement of sediments in a stream at a given cross-se...	stable
12271	Bed load discharge	Amount (weight, mass or volume) of sediment that moves on or ...	stable
12272	Suspended sediment load	That part of the total transported sediment which is suspende...	stable
12273	Total sediment load	Total quantity of sediment passing through a reach, both in s...	stable
12274	Runoff	That part of the precipitation which flows on the ground surf...	stable
12275	Runoff coefficient	Ratio of runoff depth to precipitation depth. [International ...	stable
12276	Depth of runoff	Runoff volume from a drainage basin, divided by its area, in ...	stable
12277	Soil moisture	Percentage of water in soil expressed relative to dry-soil we...	stable
12278	Live storage	Volume of water in a reservoir between the minimum and maximu...	stable
12279	Reservoir storage	Volume of a reservoir including dead storage. Synonym: total ...	stable
12280	Lake volume	Volume of water contained in a lake at a given water level. [...	stable
12281	Suspended sediment discharge	Amount of suspended sediment (suspended by turbulence for con...	stable
12282	Stream index velocity	A velocity that is representative of the average stream veloc...	stable
12283	Rock glacier velocity	Surface velocity of a single rock glacier unit.	stable
12322	Stream velocity	Ratio of the distance covered by a body of water, moving in a...	stable
12323	Stream mean velocity	Velocity at a given cross-section of a stream, obtained by di...	stable
12324	Stream surface velocity	Velocity of a stream at its surface at a given point. [Based ...	stable
12325	Water surface slope	Difference in the stage of water surface over a short stream ...	stable
12326	Schumann Resonances	Extremely Low Frequency (ELF) magnetic and electric field of ...	experimental