Sixty year 10Be record from Greenland and Antarctica

A. Aldahan, G. Possnert, S. J. Johnsen, H. B. Clausen, E. Isaksson, W. Karlen, M. Hansson

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

We report in this study the distribution of 10Be in the top 40 m of the Renland ice core (East Greenland) and in a 30 m long core from DML (Dronning Maud Land, Antarctica) for the period 1931-1988. The two sites show differences in 10Be content, the Antarctica site showing smaller variance and a lower average 10Be annual flux. Similarly, the average accumulation rate (cm water equivalent year-1) is higher in the Renland relative to DML. The variability in accumulation (precipitation) rates seems to explain part of the difference in 10Be flux between the two polar sites. Cyclic fluctuations of 10Be flux correlate with the 11-year sunspot number and cosmic ray intensity than with the aa index (perturbation of the geomagnetic activity by the solar wind). Our data corroborate 10Be cyclic fluctuation pattern from the Dye 3 ice core and confirm a promising potential for correlation of global and local events.

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalProceedings of the Indian Academy of Sciences, Earth and Planetary Sciences
Volume107
Issue number2
Publication statusPublished - 1998
Externally publishedYes

Keywords

  • Antarctica
  • Be-10
  • Climate
  • Greenland
  • Ice
  • Solar activity

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

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