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

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 centere...

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Bibliographic Details
Published in:Science
Main Authors: Baldini, J. U. L., McDermott, F., Fairchild, I. J.
Format: Article in Journal/Newspaper
Language:unknown
Published: American Association for the Advancement of Science 2002
Subjects:
Oxygen-isotope records
Climate record
Holocene
Greenland
BP
SR
Precipitation
Instability
Stalagmites
Resolution
Online Access:http://dro.dur.ac.uk/2157/
https://doi.org/10.1126/science.1071776
Description
Summary: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.

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