Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core

F. Lambert, B. Delmonte, J. R. Petit (), M. Bigler, P. R. Kaufmann, M. A. Hutterli, T. F. Stocker, U. Ruth, J. P. Steffensen and V. Maggi
Additional contact information
F. Lambert: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
B. Delmonte: University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy
J. R. Petit: Laboratoire de Glaciologie et Géophysique de l'Environment (LGGE), CNRS-University J. Fourier, BP96 38402 Saint-Martin-d’Hères cedex, France
M. Bigler: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
P. R. Kaufmann: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
M. A. Hutterli: British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
T. F. Stocker: Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
U. Ruth: Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, 27568 Bremerhaven, Germany
J. P. Steffensen: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen OE, Denmark
V. Maggi: University of Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy

Nature, 2008, vol. 452, issue 7187, 616-619

Abstract: A dust with climate The EPICA ice core, drilled at Dome C in East Antarctica, provides an undisturbed record of the past eight climatic cycles. Dust particles in the atmosphere can affect temperature by absorbing or reflecting solar radiation, and previous work suggested that production, transport and deposition of dust is influenced by climatic changes on glacial-interglacial timescales. A new analysis of the record of dust deposits in the EPICA core shows that the flux in atmospheric dust content increasingly correlates with Antarctic temperature during glacial periods as the climate gets colder, indicative of a progressive coupling of the climates of Antarctica and lower latitudes. An observed 25-fold increase in glacial dust flux over all eight glacial periods may reflect a strengthening of South American dust sources, and longer dust-particle lifetimes in the upper troposphere due to a reduced hydrological cycle during ice ages.

Date: 2008
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DOI: 10.1038/nature06763

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