GEOB 300 - Modelled extraterrestrial irradiance (K_Ex).

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Values in the graphs below represent the short-wave irradiance that would hit a flat and level surface at given latitude in absence of any atmosphere. Further we assume a circular orbit of the planet without a change in the solar 'constant' during a year. Values are approximated using the simplified set of formulae in lecture 3 (T.R. Oke 'Boundary Layer Climates', Appendix A1, p. 339-342, formulae A1.1 to A 1.4). See also the applet on slope effects.