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Temporal 10Be Variations in Ice

Published online by Cambridge University Press:  18 July 2016

Juerg Beer ,
Michael Andree ,
Hans Oeschger ,
Bernhard Stauffer ,
Richard Balzer ,
Georges Bonani ,
Christian Stoller ,
Martin Suter ,
Willy Woelfli  and
Robert C Finkel
Juerg Beer
Affiliation:
Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Michael Andree
Affiliation:
Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Hans Oeschger
Affiliation:
Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Bernhard Stauffer
Affiliation:
Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
Richard Balzer
Affiliation:
Laboratorium für Kernphysik, Swiss Federal Institute of Technology ETHZ, 8093 Zürich, Switzerland
Georges Bonani
Affiliation:
Laboratorium für Kernphysik, Swiss Federal Institute of Technology ETHZ, 8093 Zürich, Switzerland
Christian Stoller
Affiliation:
Laboratorium für Kernphysik, Swiss Federal Institute of Technology ETHZ, 8093 Zürich, Switzerland
Martin Suter
Affiliation:
Laboratorium für Kernphysik, Swiss Federal Institute of Technology ETHZ, 8093 Zürich, Switzerland
Willy Woelfli
Affiliation:
Laboratorium für Kernphysik, Swiss Federal Institute of Technology ETHZ, 8093 Zürich, Switzerland
Robert C Finkel
Affiliation:
Mt Soledad Laboratory, Scripps Institution of Oceanography S - 002, La Jolla, California 92093, U S A
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10Be (T1/2 = 1.5·106y) is mainly produced in the atmosphere by cosmic ray spallation reactions on nitrogen and oxygen. About 70 % of the production takes place in the stratosphere. 10Be becomes attached to aerosols within a very short time. If 10Be is produced in the stratosphere some latitudinal mixing occurs. Most of the 10Be is transferred to the troposphere during spring and early summer when, mainly at median latitudes, large stratospheric air masses enter the troposphere. Tropospheric 10Be is deposited rapidly on the earth's surface by precipitation. The mean residence time of 10Be in the atmosphere is ca 1 to 2 years. 10Be removed from the atmosphere by precipitation is either preserved in snow and ice layers, in the topsoil and the biosphere, or it enters the hydrosphere (oceans and lakes), where it is transported to the sediments.

Type
I. Natural 14C Variations
Information
Radiocarbon , Volume 25 , Issue 2: 11th International Radiocarbon Conference , 1983 , pp. 269 - 278
Copyright
Copyright © The American Journal of Science 

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