An 800 kyr record of ice core chemistry from the EPICA Dome C ice core

HR: 14:55h
AN: U23A-06 [Abstracts]
TI: An 800 kyr record of ice core chemistry from the EPICA Dome C ice core
AU: * Wolff, E W
EM: ewwo@bas.ac.uk
AF: British Antarctic Survey, High Cross, Madingley Road,, Cambridge, CB3 0ET United Kingdom
AU: de Angelis, M
EM: ange@lgge.obs.ujf-grenoble.fr
AF: Laboratoire de Glaciologie et GＰphysique de l'Environnement (CNRS), BP96, St Martin d@Heres, 38402 France
AU: Fischer, H
EM: Hufischer@awi-bremerhaven.de
AF: Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, Bremerhaven, D-27568 Germany
AU: Hansson, M
EM: margareta.hansson@natgeo.su.se
AF: Department of Physical Geography and Quaternary Geology, Stockholm University, Stockholm, S10691 Sweden
AU: Hutterli, M
EM: hutterli@climate.unibe.ch
AF: Climate and Environmental Physics, University of Bern, Sidlerstrasse 5, Bern, CH3012 Switzerland
AU: Steffensen, J
EM: jps@gfy.ku.dk
AF: Niels Bohr Institute for Astronomy, Physics and Geophysics, University of Copenhagen, Juliane Maries Vej 30, Copenhagen, DK2100 Denmark
AU: Udisti, R
EM: udisti@unifi.it
AF: Department of Chemistry - Analytical Chemistry Section, Scientific Pole - University of Florence, Via della Lastruccia 3, Florence, 50019 Italy
AB: This abstract is written on behalf of the entire EPICA chemistry team (only 1 representative per group is listed in the author list). The Dome C ice core now reaches back about 800 kyr in time. The isotope record shows the familiar pattern of 100 kyr cycles, but with a much lower amplitude in the earlier part of the record than in the later. Ice core chemical records can add substantial additional information about important parameters such as sea ice, atmospheric transport, etc. In this abstract we will present (at low resolution) the 800 kyr record of ionic chemistry (sea salt, terrestrial elements, sulfate). We will look at the pattern, and also at the relationship between the chemical concentrations and the temperature signal, in particular to see if the relationship is the same in the early and late part of the record. We will then interpret the signals to make preliminary inferences about South American climate (based on terrestrial elements), about sea ice extent (based on a tentative interpretation of the sea salt record) and other parameters.
DE: 9310 Antarctica
DE: 3344 Paleoclimatology
DE: 1610 Atmosphere (0315, 0325)
DE: 1620 Climate dynamics (3309)
SC: Union [U]
MN: 2004 AGU Fall Meeting