Supernovae and nitrate in the Greenland ice sheet

Details Supernovae and nitrate in the Greenland ice sheet Supernovae and nitrate in the Greenland ice sheet

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..637r&link_type=abstract

Nature, vol. 294, Dec. 17, 1981, p. 637-639.

Computer Science

16

Greenland, Land Ice, Nitrates, Supernovae, Annual Variations, Antarctic Regions, Chronology, Concentration (Composition), Solar Activity Effects, Volcanoes

Scientific paper

The possibility of a correlation between supernovae and nitrate concentration is investigated by measuring the nitrate concentration in the absolutely dated Greenland ice core from Crete over six time intervals: five surrounding the appearance of the well-established historical supernovae during the last 1000 years, and one during the Maunder minimum of solar activity. No confirmation is found for the nitrate spikes corresponding to supernovae and nitrate minimum during the Maunder minimum reported by Rood et al (1979). Instead, a regular annual nitrate concentration variation is found, superposed on a constant background. It is shown that both signals seem unaffected by the known solar activity variations over the periods analyzed, and that the nitrate contents are unaffected by peaks in acidity due to volcanic eruptions.

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