Description Usage Arguments Value References
View source: R/vapour_functions.R
Calculates the vapour pressure deficit for a given time period (daily timestep or larger) using the mean daily minimum temperature, mean daily maximum temperature, mean daily minimum relative humidity, and mean daily maxiumum humidity during that time period. See p.39 and p.74 in Allen et al. (1998).
1 | vp_deficit(atmp, RH)
|
atmp |
air temperature (degrees C). When dt is "daily" or larger, argument should be a list with elements "min" and "max" for daily min and max temperatures. When dt is "hourly", argument should be a vector with hourly recorded temperatures. |
RH |
relative humidity (percent). When dt is "daily" or larger, argument should be a list with elements "min" and "max" for daily min and max relative humidities. When dt is "hourly", argument should be a vector with hourly recorded relative humidities. |
vpd |
vapour pressure deficit (kPa) for the given time period |
Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration: Guidelines for computing crop water requirements. Rome: FAO. Retrieved from http://www.fao.org/docrep/X0490E/x0490e00.htm.
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