Evapotranspirasjon
The displayed evapotranspiration value is calculated using the FAO recommended Penman-Monteith equation.
Dokumentasjon
Parameter
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average daily air temperature
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average daily relative humidity
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average daily atmospheric pressure
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average daily solar radiation
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average daily wind speed and height of measurement
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location elevation
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latitude
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day of the year
Parameters calculated to obtain evapotranspiration value
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slope of saturation vapor pressure curve
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mean saturation vapor pressure
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actual vapor pressure derived from humidity data
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vapor pressure deficit
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inverse relative distance Earth-Sun
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solar declination
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sunset hour angle
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extraterrestrial radiation
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daylight hours
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clear-sky solar radiation
-
net solar shortwave radiation
-
net longwave radiation
-
net radiation
