Reassessment of Crete (Greenland) ice core acidity/volcanism link to climate change

Details Reassessment of Crete (Greenland) ice core acidity/volcanism link to climate change Reassessment of Crete (Greenland) ice core acidity/volcanism link to climate change

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..209c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 3, p. 209-212.

Physics

21

Acidity, Climate Change, Ice, Volcanology, Greenland, Sulfides

Scientific paper

Herein we produce a record of Crete volcanism based solely on an objective definition of individual volcanic events in the ice core record. There are 92 acidity peaks in the 1420-year record. Since at least 26 percent of the post-1600 eruptions are of local (Icelandic) origin, we estimate a mean recurrence interval of 20.8 years for hemispheric-scale eruptions rich in sulphate. On decadal time scales, volcanism has varied by a factor of three-four over the last 1400 years. However, the climate-volcanism correlation is considerably less impressive (r = -0.23) than previously concluded (r = -0.52). The good correspondence between volcanism and climate previously reported are due to background acidity levels that show a significant Little Ice Age increase. The background increase may reflect changes in ocean productivity.

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