estP | R Documentation |
Values for atmospheric pressure as a function of altitude.
estP(elev, control = list(Tko = 20))
elev |
elevation [m] |
control |
list for control parameters and empirical factors defined in
|
Tko: reference temperature [degreeC] at elevation z0. Often assumed to be 20 degreeC
z0: elevation at reference level [m]
a1: constant lapse rate moist air (0.0065 [K/m])
g: gravitational acceleration (9.807 [m/s2])
R: specific gas constant (287 [J/(kg K)])
atmospheric pressure [kPa]
eq. 3-2 of Reference
Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. FAO, Rome, 300(9).
estP(elev = 25, control = list(Tko = 20))
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