under discussion
Created: April 24, 2023
Proposer: Beate Geyer
Proposed Date: 2021-06-18
Change Date: April 24, 2023, 2:31 p.m.
Term: water_potential_evapotranspiration_amount
Unit: kg m-2
Unit ref: KMP2
"Water" means water in all phases. "Evapotranspiration" means all water vapor fluxes into the atmosphere from the surface: liquid evaporation, sublimation, and transpiration. Evaporation is the conversion of liquid or solid into vapor. Transpiration is the process by which water is carried from the roots of plants and evaporates from the stomata. (The conversion of solid alone into vapor is called "sublimation".) Potential evapotranspiration is the rate at which evaporation would take place under unaltered ambient conditions (temperature, relative humidity, wind, etc.) if the supply of water were unlimited, on the surface as if from an open water surface and unlimited in the soil. "Amount" means mass per unit area.