Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation
We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centenn...
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ftunivmilanobic:oai:boa.unimib.it:10281/28344 2024-04-21T07:52:02+00:00 Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Fischer, H. DELMONTE, BARBARA Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Delmonte, B Fischer, H 2012 http://hdl.handle.net/10281/28344 https://doi.org/10.5194/cp-8-135-2012 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000300878100009 volume:8 firstpage:135 lastpage:147 numberofpages:13 journal:CLIMATE OF THE PAST http://hdl.handle.net/10281/28344 doi:10.5194/cp-8-135-2012 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856381117 info:eu-repo/semantics/openAccess rare earth elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA info:eu-repo/semantics/article 2012 ftunivmilanobic https://doi.org/10.5194/cp-8-135-2012 2024-03-28T01:05:31Z We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSA samples. We find a shift in variability in REE composition at ∼15 000 yr BP in the ice core samples. Before 15 000 yr BP, the dust composition is very uniform and its provenance was most certainly dominated by a South American source. After 15 000 yr BP, multiple sources such as Australia and New Zealand become relatively more important, although South America remains the major dust source. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ∼15 000 yr BP, accompanied by a shift in the REE composition, thus suggesting a change of atmospheric circulation in the Southern Hemisphere. © 2012 Author(s). Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Climate of the Past 8 1 135 147 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
rare earth elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
spellingShingle |
rare earth elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Fischer, H. DELMONTE, BARBARA Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
topic_facet |
rare earth elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA |
description |
We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600-7500 yr BP) at decadal to centennial resolution. Additionally, samples from potential source areas (PSAs) for Antarctic dust were analyzed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSA samples. We find a shift in variability in REE composition at ∼15 000 yr BP in the ice core samples. Before 15 000 yr BP, the dust composition is very uniform and its provenance was most certainly dominated by a South American source. After 15 000 yr BP, multiple sources such as Australia and New Zealand become relatively more important, although South America remains the major dust source. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ∼15 000 yr BP, accompanied by a shift in the REE composition, thus suggesting a change of atmospheric circulation in the Southern Hemisphere. © 2012 Author(s). |
author2 |
Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Delmonte, B Fischer, H |
format |
Article in Journal/Newspaper |
author |
Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Fischer, H. DELMONTE, BARBARA |
author_facet |
Wegner, A Gabrielli, P Wilhelms Dick, D Ruth, U Kriews, M De Deckker, P Barbante, C Cozzi, G Fischer, H. DELMONTE, BARBARA |
author_sort |
Wegner, A |
title |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_short |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_full |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_fullStr |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_full_unstemmed |
Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
title_sort |
change in dust variability in the atlantic sector of antarctica at the end of the last deglaciation |
publishDate |
2012 |
url |
http://hdl.handle.net/10281/28344 https://doi.org/10.5194/cp-8-135-2012 |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000300878100009 volume:8 firstpage:135 lastpage:147 numberofpages:13 journal:CLIMATE OF THE PAST http://hdl.handle.net/10281/28344 doi:10.5194/cp-8-135-2012 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84856381117 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-8-135-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
1 |
container_start_page |
135 |
op_container_end_page |
147 |
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