Jena 2013 – scientific programme

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UP: Fachverband Umweltphysik

UP 15: Symposium Einfluss der Sonne auf das Klima der Erde

UP 15.1: Invited Talk

Thursday, February 28, 2013, 14:00–14:30, HS 2

Solar irradiance variability — •Sami Solanki — Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany

The Sun ist now known to be a variable Star.

Since 1978 satellite based radiometers have been measuring changes in solar irradiance, so that the available record now covers 3 solar cycles. These data have uncoverd a rich structure of the variable solar irradiance. In addition, the physical understanding of irradiance variations and the detailed reconstruction of this quantity (both for the time in which observations are available and for earlier times) have made great strides over the last years. However, there are some significant differences between observations and models regarding the spectral irradiance, which is of great promise for affecting the Earth's atmosphere and also climate.

In this talk an overview of the measurements and the modelling of total and spectral irradiance variations is given, highlighting in particular the progress of the last few years, but also pointing out the problems.