Geomagnetic Modulation of the 36 Cl Flux in the GRIP Ice Core, Greenland

Geomagnetic field strength is expected to affect the production rate of cosmogenic isotopes such as beryllium-10, carbon-14, or chlorine-36. Chlorine-36 data from the Greenland Ice Core Project (GRIP) ice core agree well with a production rate calculation based on a paleomagnetic reconstruction for...

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Bibliographic Details
Published in:Science
Main Authors: Baumgartner, S., Beer, J., Masarik, J., Wagner, G., Meynadier, L., Synal, H.-A.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1998
Subjects:
Greenland
Greenland ice core
Greenland Ice core Project
GRIP
ice core
Online Access:https://doi.org/10.1126/science.279.5355.1330
https://www.science.org/doi/pdf/10.1126/science.279.5355.1330
Description
Summary:Geomagnetic field strength is expected to affect the production rate of cosmogenic isotopes such as beryllium-10, carbon-14, or chlorine-36. Chlorine-36 data from the Greenland Ice Core Project (GRIP) ice core agree well with a production rate calculation based on a paleomagnetic reconstruction for the past 100,000 years over both long- and short-term variations. A chlorine-36 peak at 38,000 years ago previously found in the beryllium-10 record from the Vostok ice core can be explained by a period of low geomagnetic field intensity.

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