Jena 2013 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 4: Poster Session

EP 4.41: Poster

Dienstag, 26. Februar 2013, 11:15–12:45, Poster OG

Reconstruction of the Solar Modulation Parameter during the Holocene — •Klaudia Herbst¹, Bernd Herber¹, and Jürg Beer² — ¹Christian-Albrechts-Universität zu Kiel, D-24118 Kiel, Kiel — ²Swiss Federal Institute of Aquatic Science and Technology, EAWAG, Dübendorf, Switzerland

On their way through the interplanetary space the intensity of galactic cosmic rays is modulated by the solar activity. In the Earth’s atmosphere, however, the intensities of these primary cosmic rays but also of secondary particles produced in the atmosphere are anti-correlated to the solar activity. Cosmogenic radionuclides produced by spallation reactions of primary and secondary hadrons with atmospheric nuclei are mixed and transported into natural archives like ice sheets, tree rings or sediments. We compute the local and global production rates of ¹⁰Be, ⁷Be, ³H, ³⁶Cl, ²⁶Al and ¹⁴C on shorter time-scales, showing a clear anti-correlation to the solar activity. For ¹⁴C we present, moreover, production rates for the entire Holocene and investigate their correlation to the solar modulation parameter.