ssd2rad {marelac}R Documentation

Estimate Global Radiation from Measured Sunshine Duration Time

Description

The function converts values of sunshine duration (in hours) to global radiation (in Jm2s1J m^{-2} s^{-1}).

Usage

ssd2rad(S, doy, a = 0.25, b = 0.5, rho = 50.29)

Arguments

S

Sunshine duration (hours)

doy

Julian day (for northern hemisphere only)

a, b, rho

site specific conversion parameters, must be fitted to measured data.

Value

Estimated value of global radiaton in Jm2s1J m^{-2} s^{-1}.

Note

Don't forget to fit the function parameters to site specific values!

References

Dyck S and Peschke G., 1995. Grundlagen der Hydrologie. 3. Auflage. Verlag f?r Bauwesen, Berlin 1995, ISBN 3-345-00586-7.

See Also

coriolis, viscosity, diffcoeff, vertmean, gravity

Examples

ssd2rad(8, 120)

[Package marelac version 2.1.11 Index]