Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core
Dust can affect the radiative balance of the atmosphere by absorbing or reflecting incoming solar radiation; it can also be a source of micronutrients, such as iron, to the ocean. It has been suggested that production, transport and deposition of dust is influenced by climatic changes on glacial-int...
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Online Access: | http://hdl.handle.net/10281/6600 https://doi.org/10.1038/nature06763 |
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ftunivmilanobic:oai:boa.unimib.it:10281/6600 2024-04-14T08:01:18+00:00 Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core Lambert, F Petit, JR Bigler, M Kaufmann, PR Hutterli, MA Stocker, TF Ruth, U Steffensen, JP DELMONTE, BARBARA MAGGI, VALTER Lambert, F Delmonte, B Petit, J Bigler, M Kaufmann, P Hutterli, M Stocker, T Ruth, U Steffensen, J Maggi, V 2008 http://hdl.handle.net/10281/6600 https://doi.org/10.1038/nature06763 eng eng Nature Publishing Group country:GB info:eu-repo/semantics/altIdentifier/pmid/18385736 info:eu-repo/semantics/altIdentifier/wos/WOS:000254567200042 volume:452 issue:7187 firstpage:616 lastpage:619 numberofpages:4 journal:NATURE http://hdl.handle.net/10281/6600 doi:10.1038/nature06763 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-41649092047 climate dust ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA info:eu-repo/semantics/article 2008 ftunivmilanobic https://doi.org/10.1038/nature06763 2024-03-21T16:26:14Z Dust can affect the radiative balance of the atmosphere by absorbing or reflecting incoming solar radiation; it can also be a source of micronutrients, such as iron, to the ocean. It has been suggested that production, transport and deposition of dust is influenced by climatic changes on glacial-interglacial timescales. Here we present a high-resolution record of aeolian dust from the EPICA Dome C ice core in East Antarctica, which provides an undisturbed climate sequence over the past eight climatic cycles. We find that there is a significant correlation between dust flux and temperature records during glacial periods that is absent during interglacial periods. Our data suggest that dust flux is increasingly correlated with Antarctic temperature as the climate becomes colder. We interpret this as progressive coupling of the climates of Antarctic and lower latitudes. Limited changes in glacial-interglacial atmospheric transport time suggest that the sources and lifetime of dust are the main factors controlling the high glacial dust input. We propose that the observed ∼25-fold increase in glacial dust flux over all eight glacial periods can be attributed to a strengthening of South American dust sources, together with a longer lifetime for atmospheric dust particles in the upper troposphere resulting from a reduced hydrological cycle during the ice ages. ©2008 Nature Publishing Group. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Antarctic East Antarctica Nature 452 7187 616 619 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
climate dust ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
spellingShingle |
climate dust ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA Lambert, F Petit, JR Bigler, M Kaufmann, PR Hutterli, MA Stocker, TF Ruth, U Steffensen, JP DELMONTE, BARBARA MAGGI, VALTER Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
topic_facet |
climate dust ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
description |
Dust can affect the radiative balance of the atmosphere by absorbing or reflecting incoming solar radiation; it can also be a source of micronutrients, such as iron, to the ocean. It has been suggested that production, transport and deposition of dust is influenced by climatic changes on glacial-interglacial timescales. Here we present a high-resolution record of aeolian dust from the EPICA Dome C ice core in East Antarctica, which provides an undisturbed climate sequence over the past eight climatic cycles. We find that there is a significant correlation between dust flux and temperature records during glacial periods that is absent during interglacial periods. Our data suggest that dust flux is increasingly correlated with Antarctic temperature as the climate becomes colder. We interpret this as progressive coupling of the climates of Antarctic and lower latitudes. Limited changes in glacial-interglacial atmospheric transport time suggest that the sources and lifetime of dust are the main factors controlling the high glacial dust input. We propose that the observed ∼25-fold increase in glacial dust flux over all eight glacial periods can be attributed to a strengthening of South American dust sources, together with a longer lifetime for atmospheric dust particles in the upper troposphere resulting from a reduced hydrological cycle during the ice ages. ©2008 Nature Publishing Group. |
author2 |
Lambert, F Delmonte, B Petit, J Bigler, M Kaufmann, P Hutterli, M Stocker, T Ruth, U Steffensen, J Maggi, V |
format |
Article in Journal/Newspaper |
author |
Lambert, F Petit, JR Bigler, M Kaufmann, PR Hutterli, MA Stocker, TF Ruth, U Steffensen, JP DELMONTE, BARBARA MAGGI, VALTER |
author_facet |
Lambert, F Petit, JR Bigler, M Kaufmann, PR Hutterli, MA Stocker, TF Ruth, U Steffensen, JP DELMONTE, BARBARA MAGGI, VALTER |
author_sort |
Lambert, F |
title |
Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
title_short |
Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
title_full |
Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
title_fullStr |
Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
title_full_unstemmed |
Dust-climate couplings over the past 800,000 years from the EPICA Dome C ice core |
title_sort |
dust-climate couplings over the past 800,000 years from the epica dome c ice core |
publisher |
Nature Publishing Group |
publishDate |
2008 |
url |
http://hdl.handle.net/10281/6600 https://doi.org/10.1038/nature06763 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/18385736 info:eu-repo/semantics/altIdentifier/wos/WOS:000254567200042 volume:452 issue:7187 firstpage:616 lastpage:619 numberofpages:4 journal:NATURE http://hdl.handle.net/10281/6600 doi:10.1038/nature06763 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-41649092047 |
op_doi |
https://doi.org/10.1038/nature06763 |
container_title |
Nature |
container_volume |
452 |
container_issue |
7187 |
container_start_page |
616 |
op_container_end_page |
619 |
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1796308337550163968 |