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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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/52158 2023-05-15T13:56:44+02:00 Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. 2015-12-10T22:20:56Z http://hdl.handle.net/1885/52158 unknown Copernicus GmbH 1814-9340 http://hdl.handle.net/1885/52158 Climate of the Past Discussions Journal article 2015 ftanucanberra 2015-12-21T23:32:24Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Australian National University: ANU Digital Collections Antarctic Dronning Maud Land New Zealand |
institution |
Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
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. |
format |
Article in Journal/Newspaper |
author |
Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
spellingShingle |
Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation |
author_facet |
Wegner, Anna Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, Michael De Deckker, Patrick Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
author_sort |
Wegner, Anna |
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 |
publisher |
Copernicus GmbH |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/52158 |
geographic |
Antarctic Dronning Maud Land New Zealand |
geographic_facet |
Antarctic Dronning Maud Land New Zealand |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core |
op_source |
Climate of the Past Discussions |
op_relation |
1814-9340 http://hdl.handle.net/1885/52158 |
_version_ |
1766264309880455168 |