Variation of the Radiocarbon Content of Tree Rings during the Spoerer Minimum

Details Variation of the Radiocarbon Content of Tree Rings during the Spoerer Minimum Variation of the Radiocarbon Content of Tree Rings during the Spoerer Minimum

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.4139m&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

Scientific paper

The radio carbon content of tree rings offers important information on the level of the solar activity in the past. We have fo cused on the variation of solar activity during the grand minima, when solar activity was extremely low. In order to clarify the characteristics of solar activity during the grand minima, we measured the radio carbon content of tree rings from the spo erer Minimum (14151534 AD) annually. The time series was analyzed and periodicities of 7, 11 and 22 years were derived. The 11-year periodicity was dominant, however it was weakened during 1460-1500 AD.

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