psychro | R Documentation |
This function calculates the temperature and pressure dependent psychrometric constant.
psychro(tc, pa, kMa = 0.028963, kMv = 0.01802)
tc |
double, air temperature, degrees C. |
pa |
double, atm pressure, Pa. |
kMa |
double, molecular weight of dry air, kg/mol. Default: 0.028963 (Tsilingiris, 2008) |
kMv |
double, molecular weight of water vapor, kg/mol. Default: 0.01802 (Tsilingiris, 2008) |
double, Pa/K.
Allen, R.G., Pereira, L.S., Raes, D. and Smith, M., 1998. Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. Food and Agriculture Organization of the United Nations, Rome, 300(9), p.D05109. Available: http://www.fao.org/docrep/x0490e/x0490e07.htm
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