The irradiation at the top of earth's atmosphere varies according to different parameters. Some of the variation of those parameters with time are more or less unknown, like the solar constant. Others, like the orbital parameters of the earth, may be computed quite accurate for at least the last one million years.

We have developed a tool to compute and display the daily irradiation and it's variation with time. You can:

This irradiation module is based on the work of André Berger, Marie-France Loutre and Christian Tricot, 1993: Insolation and Earth's Orbital Periods. Journal of Geophysical Research, Vol. 98, No. D6 and was programed by André Paul. For problems with the www-interface please contact Andreas Manschke.

[Gruppe Geosystem-Modellierung] - [Fachbereich Geowissenschaften] - [Uni Bremen]

16. November 1995, Andreas Manschke