Large amplitude solar modulation cycles of 10Be in Antarctica: Implications for atmospheric mixing processes and interpretation of the ice core record
Article first published online: 7 DEC 2012
Copyright 1996 by the American Geophysical Union.
Geophysical Research Letters
Volume 23, Issue 5, pages 523–526, 1 March 1996
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 19 DEC 1995
- Manuscript Received: 29 SEP 1995
10Be concentrations in an ice core at Taylor Dome, Antarctica show greater variation over the last 75 years than similar 10Be time-series from Greenland. Like the Greenland records, the new Antarctic data exhibit a strong periodicity which follows expected changes in the production rate of 10Be over the 11-year solar cycle. Noting that the amplitude of production-rate variation is both latitude and altitude dependent, we estimate the relative contribution of 10Be from different atmospheric reservoirs. The calculations yield a relatively small (<35%) contribution from the low-to-mid latitude stratosphere, suggesting a weak coupling between Antarctic 10Be and geomagnetic field intensity.