Early last glacial intra-interstadial climate variability recorded in a Sardinian speleothem

Chemical and physical proxy data from a precisely dated early last glacial (~113e110 ka, MIS5d) Sardinian stalagmite reveal a sub-millennial-scale, cool-dry climate event centered at 112.0 þ0.52/-0.59 ka, followed by a rapid return to warm-wet conditions at 111.76 þ0.43/-0.45 ka. Comparison with reg...

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Bibliographic Details
Published in:Quaternary Science Reviews
Main Authors: COLUMBU, ANDREA, Drysdale, Russell, Capron, Emilie, Woodhead, Jon, DE WAELE, JO HILAIRE AGNES, Sanna, Laura, Hellstrom, John, Bajo, Petra
Other Authors: Columbu, Andrea, De Waele, Jo
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Speleothems Greenland interstadials/stadials Ice-core chronology U-Th dating
Greenland
ice core
NGRIP
Online Access:http://hdl.handle.net/11585/604622
https://doi.org/10.1016/j.quascirev.2017.05.007
Description
Summary:Chemical and physical proxy data from a precisely dated early last glacial (~113e110 ka, MIS5d) Sardinian stalagmite reveal a sub-millennial-scale, cool-dry climate event centered at 112.0 þ0.52/-0.59 ka, followed by a rapid return to warm-wet conditions at 111.76 þ0.43/-0.45 ka. Comparison with regional speleothem records and the palaeotemperature proxy record from the NGRIP ice core (Greenland) suggests that this event corresponds to Greenland Interstadial (GI) 25b and 25a, an intra-interstadial climate oscillation within GI-25, according to the recent Greenland stratigraphic framework. The speleothem age is in reasonable agreement (within 0.8 kyr) with that of the corresponding event in Greenland based on the GICC05modelext ice chronology but is older by about 3.7 kyr than the Greenland age based on the AICC2012 chronology.

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