Partial retraction in:

Baldini JU, McDermott F, Fairchild IJ. Science. 2007 Aug 10;317(5839):748.

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

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

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 [PubMed]