rns {sirad}

Net shortwave radiation

Description

'rns' computes daily the net shortwave radiation. resulting from the balance between incoming and reflected solar radiation.

Usage

rns(sol_rad,albedo=0.23)

Arguments

sol_rad

Vector of length n of daily solar radiation [MJm-2d-1].

albedo

Albedo or canopy reflection coefficient, which is 0.23 for the hypothetical grass reference crop [dimensionless].

Details

Daily net shortwave radiation results from the balance between incoming and reflected solar radiation.

Value

Vector of length n of daily net shortwave radiation. [MJm-2d-1]

Author(s)

Jedrzej S. Bojanowski

References

Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. 1998. Crop Evapotranspiration: Guidelines for computing crop water requirements. Irrigation and Drainage Paper 56, Food and Agriculture Organization of the United Nations, Rome, pp. 300.

Examples

rns(sol_rad=14.5)