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

authors

Contributors

Université de Bologne,

University of Melbourne,

Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) ; Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS),

Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ),

School of Earth Sciences [Melbourne] ; Faculty of Science [Melbourne] ; University of Melbourne-University of Melbourne,

Istituto Italiano di Speleologia,

Department of Resource Management and Geography ; University of Melbourne

+ 5

Publisher

HAL CCSD,

Elsevier

Abstract

International audience Chemical and physical proxy data from a precisely dated early last glacial (similar to 113-110 ka, MIS5d) Sardinian stalagmite reveal a sub-millennial-scale, cool-dry climate event centered at 112.0 (+0.52)/(-0.59) ka, followed by a rapid return to warm-wet conditions at 111.76 (+0-43)/(-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. (C) 2017 Elsevier Ltd. All rights reserved.