HR: 16:00h
AN: PP44B-01 INVITED    [Abstracts]
TI: Greenland and Antarctic ice core records of millennial scale variability
AU: * Masson-Delmotte, V
EM: valerie.masson@cea.fr
AF: LSCE (CEA-CNRS-UVSQ-IPSL), Bat 701 L'Orme des Merisiers CEA Saclay, Gif sur Yvette, 91191, France
AU: Blunier, T
EM: blunier@gfy.ku.dk
AF: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen Juliane Maries Vej 30, København, DK-2100, Denmark
AU: Chappellaz, J
EM: jerome@glaciog.ujf-grenoble.fr
AF: LGGE (UMR 5183 CNRS-UJF), 54 rue Molière - Domaine Universitaire - BP 96, St Martin d'Hères, 38402, France
AU: Dahl-Jensen, D
EM: ddj@gfy.ku.dk
AF: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen Juliane Maries Vej 30, København, DK-2100, Denmark
AU: Fischer, H
EM: hubertus.fischer@awi.de
AF: Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Bremerhaven, D-27568, Germany
AU: Jouzel, J
EM: jean.jouzel@cea.fr
AF: LSCE (CEA-CNRS-UVSQ-IPSL), Bat 701 L'Orme des Merisiers CEA Saclay, Gif sur Yvette, 91191, France
AU: Landais, A
EM: amaelle.landais@cea.fr
AF: LSCE (CEA-CNRS-UVSQ-IPSL), Bat 701 L'Orme des Merisiers CEA Saclay, Gif sur Yvette, 91191, France
AU: Loulergue, L
EM: loulergue@glaciog.ujf-grenoble.fr
AF: LGGE (UMR 5183 CNRS-UJF), 54 rue Molière - Domaine Universitaire - BP 96, St Martin d'Hères, 38402, France
AU: Loulergue, L
EM: loulergue@glaciog.ujf-grenoble.fr
AF: Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Bremerhaven, D-27568, Germany
AU: Stenni, B
EM: stenni@univ.trieste.it
AF: Università di Trieste Dipartimento di Scienze Geologiche, Ambientali e Marine, Via E. Weiss 2, Trieste, 34127, Italy
AB: Greenland ice cores drilled at Summit and NorthGRIP provide high resolution records of north Atlantic millennial scale variability spanning the last glacial-interglacial cycle. We will review the Greenland temperature records of millennial scale variability and discuss the magnitude and pacing of the Dansgaard-Oeschger (D/O) events, using records of water stable isotopes and firn gas fractionation method estimates. Owing to the rapid methane fluctuations associated with D/O events, ice core records from Antarctica can be synchronised with Greenland records. High resolution analyses conducted on the EPICA Dronning Maud Land ice core have indeed revealed that each D/O event has an Antarctic counterpart (EPICA comm.. members, Nature, 2006). We will use the longest available Antarctic record obtained from the EPICA Dome C ice core to discuss the Antarctic stable isotope and methane evidence for D/O type events over the past 800 ka.
DE: 0724 Ice cores (4932)
DE: 1041 Stable isotope geochemistry (0454, 4870)
DE: 1605 Abrupt/rapid climate change (4901, 8408)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting