Heliospheric Modulation over the Past 10,000 Years as Derived from Cosmogenic Nuclides

Details Heliospheric Modulation over the Past 10,000 Years as Derived from Cosmogenic Nuclides Heliospheric Modulation over the Past 10,000 Years as Derived from Cosmogenic Nuclides

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.4147b&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

3

Scientific paper

Neutron monitors have recorded variations in cosmic rays with high precision and high temporal resolution for the past 50 years. However, sunspots and other solar proxies indicate that larger changes in heliospheric modulation are to be expected over longer time scales. Cosmogenic radionuclides provide a to ol to extend the neutron monitor records to at least 10,000 years, but with a much coarser temporal resolution (>1 y) and a lower signal to noise ratio. Using the 10 Be record from the GISP2 ice core it is shown how the geomagnetic modulation component is removed, and the remaining 10 Be signal interpreted in terms of the heliospheric modulation parameter Φ.

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