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10Be Concentrations in Antarctic Ice

Published online by Cambridge University Press:  20 January 2017

J. Beer ,
H. Oeschger ,
G. Bonani ,
M. Suter  and
W. Wölfli
J. Beer
Affiliation:
Universität Bern, Physikalisches Institut, CH-3012 Bern, Sidlerstraße 5, Switzerland
H. Oeschger
Affiliation:
Universität Bern, Physikalisches Institut, CH-3012 Bern, Sidlerstraße 5, Switzerland
G. Bonani
Affiliation:
Institut für Mittelenergiephysik, ETH, Zürich, Switzerland
M. Suter
Affiliation:
Institut für Mittelenergiephysik, ETH, Zürich, Switzerland
W. Wölfli
Affiliation:
Institut für Mittelenergiephysik, ETH, Zürich, Switzerland
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Abstract

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Measurements of the cosmogenic isotope 10Be (T½ = 1.5 Ma) on Greenland ice cores produced interesting results. Variations in the 10Be concentrations can be interpreted in terms of changes in the production rate and in atmospheric circulation and deposition. During the Holocene, good agreement between short-term variations in 10Be and 14C indicates that the production rate of both isotopes was changing, probably due to solar modulation.

During the last ice age, periods with significantly higher 10Be concentrations are observed. The good anti-correlation between 10Be and δ18O suggests that these intervals correspond to periods of low precipitation rates.

Work on Antarctic ice cores is in progress, but only relatively few 10Be data have been published yet. 10 Be results from Antarctic ice cores are presented and compared with data from Greenland.

Type
Research Article
Information
Annals of Glaciology , Volume 10 , 1988 , pp. 200
Copyright
Copyright © International Glaciological Society 1988