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Science. 2002 Jun 21;296(5576):2203-6.

Structure of the 8200-year cold event revealed by a speleothem trace element record.

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1
Department of Geology, University College Dublin, Belfield, Dublin 4, Ireland. james.baldini@ucd.ie

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Abstract

Abrupt first-order shifts in strontium and phosphorus concentrations in stalagmite calcite deposited in western Ireland during the 8200-year event (the major cooling episode 8200 years before the present) are interpreted as responses to a drier climate lasting about 37 years. Both shifts are centered on 8330 +/- 80 years before the present, coinciding with a large oxygen isotope anomaly and a change in the calcite petrography. In this very high resolution (monthly) record, antipathetic second-order oscillations in phosphorus and strontium reveal decreased growth rates and increased rainfall seasonality. Growth rate variations within the event reveal a two-pronged structure consistent with recent model simulations.

PMID:
12077412
DOI:
10.1126/science.1071776
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