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1. The combined processes of evaporation, sublimation, and transpiration of the water from the earth's surface into the atmosphere.
2. The total amount of water transferred from the earth to the atmosphere.

[evapo(ration) and transpiration.]


(Environmental Science) the return of water vapour to the atmosphere by evaporation from land and water surfaces and by the transpiration of vegetation


(ɪˌvæp oʊˌtræn spəˈreɪ ʃən)

the transfer of moisture from the earth to the atmosphere by evaporation of water and transpiration from plants.
[1945–50; evapo(ration) + transpiration]
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References in periodicals archive ?
Daily values of potential evapotranspiration (PET) calculated using the Penman-Monteith equation (black line) and relative soil water content (coloured lines) during the growing seasons in the three study years.
Mean annual rainfall and potential evapotranspiration are 1974.77 and 1327.29 mm, respectively, and mean monthly temperatures oscillate between 23.2 and 25.8 [degrees]C (Souza et al., 2013).
Where, Ya is the estimated yield (kg [ha.sup.-1]); Yp, the potential yield (kg [ha.sup.-1]); ETr, the actual evapotranspiration (mm); ETp, the potential evapotranspiration (mm); and kyi is the coefficient of penalization productivity due to water deficiency for each developmental stage.
The fruit number per cluster of the "Bengal" cultivar decreased with increases in the rates of degree days of 200[degrees]C day, potential evapotranspiration of 50 mm, and actual evapotranspiration of 50 mm.
Hobbins, "Estimation of potential evapotranspiration from extraterrestrial radiation, air temperature and humidity to assess future climate change effects on the vegetation of the Northern Great Plains, USA," Ecological Modelling, vol.
where D is water balance; P (mm) is precipitation; PET (mm) is potential evapotranspiration.
Fields were located along a transect of a decreasing ratio of precipitation to potential evapotranspiration (ET[sub.o]), with six fields in Yolo County (ET[sub.o] = 1.01), four in San Joaquin County (ET[sub.o] = 0.54) and six in Fresno County (ET[sub.o] = 0.31), three of the growing regions with the largest production of processing tomatoes in the state.
Comparison of MSM model for prediction of potential evapotranspiration of maize with FAO methods.
In addition, based on studies performed by Kazemi et al in Qazvin and in a 20-year statistical period (1991-2011), potential evapotranspiration amount during first 8 months of the year, has been 4.9 times more than total annual rainfall in this area.
Normally, a conceptual hydrological model requires at least two input variables (potential evapotranspiration and rainfall) to quantify the inputs and water losses in the water balance.
The potential evapotranspiration, either from the interception (PET0) or from the soilwater in the root zone (PET), is computedbased on the Shuttleworth-Wallace (S-W) model developed by Zhou et al.

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