32Si in precipitation: evaluation of temporal and spatial variation and as dating tool for glacial ice

Details 32Si in precipitation: evaluation of temporal and spatial variation and as dating tool for glacial ice 32Si in precipitation: evaluation of temporal and spatial variation and as dating tool for glacial ice

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996e%26psl.144..289m&link_type=abstract

Earth and Planetary Science Letters, Volume 144, Issue 1-2, p. 289-296.

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Scientific paper

The use of 32Si (half-life about 140 yr) as a dating tool requires knowledge of its temporal and spatial distribution. Previously reported and new data are similar to the patterns of other cosmogenic radionuclides: latitude and seasonal variation, anti-correlation to solar activity, contribution from nuclear weapons testing, highest natural concentrations in Antarctica. Compiled and estimated 32Si/Si ratios show that rain, snow and ice samples of low Si concentration could be measured by accelerator mass spectrometry. A significant single-event 32Si deposition (concentration higher by a factor of 4) was detected (β counting) in fresh snow on the Jungfraujoch, Switzerland, due to scavenging from the atmosphere by an abnormally high atmospheric dust content.

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