Regensburg 2007 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 6: Erde
EP 6.1: Vortrag
Dienstag, 27. März 2007, 15:00–15:15, H46
Solar or Cosmic Ray Forcing of the Terrestrial Climate? — •Horst Fichtner1, Klaus Scherer1, and Bernd Heber2 — 1Institut für Theoretische Physik IV. Weltraum- und Astrophysik, Ruhr-Universität Bochum — 2Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel
There is increasing evidence that there exist interstellar-terrestrial relations and that the heliosphere’s effectivity to serve as a protecting shield for the Earth, specifically against cosmic rays, is varying in time. Nonetheless, a debate is going on whether the Sun or the cosmic rays are driving the terrestrial climate, particularly on periods of hundred years and shorter. As the modelling of the transport of cosmic rays in the heliosphere has evolved from pure test particle simulations to far more consistent treatments, one can explain various correlations within the framework of physical models and one can make quantitative predictions regarding terrestrial indicators of interstellar-terrestrial relations. This level of understanding and modelling allows to identify a criterion with which one can discriminate between solar and cosmic ray forcing on a period of several decades. We define such a criterion and discuss related existing observations.