10Be evidence for the Matuyama–Brunhes geomagnetic reversal in the EPICA Dome C ice core

G. M. Raisbeck (), F. Yiou, O. Cattani and J. Jouzel
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G. M. Raisbeck: IN2P3-CNRS-Université de Paris-Sud
F. Yiou: IN2P3-CNRS-Université de Paris-Sud
O. Cattani: CEA-CNRS-UVSQ, CE Saclay
J. Jouzel: CEA-CNRS-UVSQ, CE Saclay

Nature, 2006, vol. 444, issue 7115, 82-84

Abstract: A geomagnetic reversal Every few hundred thousand years, Earth's north and south magnetic poles swap places. For the first time, a record of one of these geomagnetic reversals has been found in an ice core. Because the strength of the field is very low during a reversal, the intensity of cosmic rays in the Earth's atmosphere is increased. This leads to an increase in the quantity of 10Be (which like 14C is formed by cosmic rays in the atmosphere) deposited in the ice. It is this 10Be enhancement in the ice that has been detected.

Date: 2006
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DOI: 10.1038/nature05266

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