FAO56 (version 1.0)

NLRad: Net Longwave Radiation (R_nl)

Description

NLRad returns the value of net longwave radiation.

Usage

NLRad(T_max, T_min, e_a, R_s, R_so)

Value

The function returns the value of net solar or net shortwave radiation as a numeric scalar.

Arguments

T_max

Optional. A numeric scalar that denotes the daily maximum temperature [C].

T_min

Optional. A numeric scalar that denotes the daily minimum temperature [C].

e_a

Optional. A numeric scalar that denotes the actual vapour pressure [kPa].

R_s

A numeric scalar that denotes the incoming solar radiation [\(MJ/(m^2\times day)\)].

R_so

A numeric scalar that denotes clear-sky radiation [\(MJ/(m^2\times day)\)].

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), D05109.

Details

This is a function to calculate the net longwave radiation [\(MJ/(m^2\times day)\)].

See Also

CSSRad, NLRad, NRad.

Examples

NLRad(T_max = 25.1, T_min = 19.1, e_a = 2.1, R_s = 14.5, R_so = 18.8)