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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ftcopernicus:oai:publications.copernicus.org:cp10204 2023-05-15T13:36:36+02:00 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. Deckker, P. Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. 2018-09-27 application/pdf https://doi.org/10.5194/cp-8-135-2012 https://cp.copernicus.org/articles/8/135/2012/ eng eng doi:10.5194/cp-8-135-2012 https://cp.copernicus.org/articles/8/135/2012/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-8-135-2012 2020-07-20T16:25:55Z 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. Text Antarc* Antarctic Antarctica Dronning Maud Land EPICA ice core Copernicus Publications: E-Journals Antarctic Dronning Maud Land New Zealand Climate of the Past 8 1 135 147 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
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 |
Text |
author |
Wegner, A. Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, M. Deckker, P. Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
spellingShingle |
Wegner, A. Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, M. Deckker, P. 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, A. Gabrielli, P. Wilhelms-Dick, D. Ruth, U. Kriews, M. Deckker, P. Barbante, C. Cozzi, G. Delmonte, B. Fischer, H. |
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 |
2018 |
url |
https://doi.org/10.5194/cp-8-135-2012 https://cp.copernicus.org/articles/8/135/2012/ |
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 |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-8-135-2012 https://cp.copernicus.org/articles/8/135/2012/ |
op_doi |
https://doi.org/10.5194/cp-8-135-2012 |
container_title |
Climate of the Past |
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8 |
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1 |
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135 |
op_container_end_page |
147 |
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1766081243314651136 |