EvapHeat {EcoHydRology} | R Documentation |
Evaporative heat exchange between a surface and the surrounding air [kJ m-2 d-1]. This function is only intended for wet surfaces, i.e., it assumes the vapor density at the surface is the saturation vapor density
EvapHeat(surftemp, airtemp, relativehumidity=NULL, Tn=NULL, wind=2)
surftemp |
surface temperature [C] |
airtemp |
average daily air temperature [C] |
relativehumidity |
relative humidity, 0-1 [-] |
Tn |
minimum dailiy air temperature, assumed to be dew point temperature if relativehumidity unknown [C] |
wind |
average daily windspeed [m/s] |
This function will use the relative humidity to esimate air vapor density if the value passed is between 0-1. Otherwise, it will assume the minimum daily air temperature is approximately the dew point temp.
M. Todd Walter
Campbell, Gaylon S. An Introduction to Environmental Biophysics. New York: Springer-Verlag, 1977.
EvapHeat(surftemp=15, airtemp=5, relativehumidity=0.7)