A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice
We present the first Rare Earth Elements (REE) concentration record determined in 294 sections of an Antarctic ice core (EPICA Dome C), covering a period from 2.9 to 33.7 kyr BP. REE allow a detailed quantitative evaluation of aeolian dust composition because of the large number of variables (i.e. 1...
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Online Access: | http://hdl.handle.net/10281/10368 https://doi.org/10.1016/j.quascirev.2009.09.002 |
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ftunivmilanobic:oai:boa.unimib.it:10281/10368 2024-04-21T07:48:58+00:00 A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice Gabrielli, P Wegner, A Petit, JR DELMONTE, BARBARA De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C. Gabrielli, P Wegner, A Petit, J Delmonte, B De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C 2010 http://hdl.handle.net/10281/10368 https://doi.org/10.1016/j.quascirev.2009.09.002 eng eng Pergamon info:eu-repo/semantics/altIdentifier/wos/WOS:000274958000023 volume:29 issue:1-2 firstpage:265 lastpage:273 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/10368 doi:10.1016/j.quascirev.2009.09.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-73549124238 Rare Earth Elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA GEO/08 - GEOCHIMICA E VULCANOLOGIA info:eu-repo/semantics/article 2010 ftunivmilanobic https://doi.org/10.1016/j.quascirev.2009.09.002 2024-03-28T01:02:31Z We present the first Rare Earth Elements (REE) concentration record determined in 294 sections of an Antarctic ice core (EPICA Dome C), covering a period from 2.9 to 33.7 kyr BP. REE allow a detailed quantitative evaluation of aeolian dust composition because of the large number of variables (i.e. 14 elements). REE concentrations match the particulate dust concentration profile over this period and show a homogeneous crustal-like composition during the last glacial stage (LGS), with only a slight enrichment in medium REE. This signature is consistent with the persistent fallout of a mixture of dust from heterogeneous sources located in different areas or within the same region (e.g. South America). Starting at ∼15 kyr BP, there was a major change in dust composition, the variable character of which persisted throughout the Holocene. This varying signature may highlight the alternation of single dust contributions from different sources during the Holocene. We observe that the frequent changes in REE composition at the onset of the Holocene (10-13.5 kyr BP) are linked to dust size and in turn to wind strength and/or the path of the atmospheric trajectory. This may indicate that atmospheric circulation dictated the composition of the dust fallout to East Antarctica at that time. Although the dust concentrations remained fairly low, a notable return towards more glacial dust characteristics is recorded between 7.5 and 8.3 kyr BP. This happened concomitantly with a widespread cold event around 8 kyr BP that was 400-600 years long and suggests a moderate reactivation of the dust emission from the same potential source areas of the LGS. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Quaternary Science Reviews 29 1-2 265 273 |
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 GEO/08 - GEOCHIMICA E VULCANOLOGIA |
spellingShingle |
Rare Earth Elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA GEO/08 - GEOCHIMICA E VULCANOLOGIA Gabrielli, P Wegner, A Petit, JR DELMONTE, BARBARA De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C. A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
topic_facet |
Rare Earth Elements ice cores antarctica GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA GEO/08 - GEOCHIMICA E VULCANOLOGIA |
description |
We present the first Rare Earth Elements (REE) concentration record determined in 294 sections of an Antarctic ice core (EPICA Dome C), covering a period from 2.9 to 33.7 kyr BP. REE allow a detailed quantitative evaluation of aeolian dust composition because of the large number of variables (i.e. 14 elements). REE concentrations match the particulate dust concentration profile over this period and show a homogeneous crustal-like composition during the last glacial stage (LGS), with only a slight enrichment in medium REE. This signature is consistent with the persistent fallout of a mixture of dust from heterogeneous sources located in different areas or within the same region (e.g. South America). Starting at ∼15 kyr BP, there was a major change in dust composition, the variable character of which persisted throughout the Holocene. This varying signature may highlight the alternation of single dust contributions from different sources during the Holocene. We observe that the frequent changes in REE composition at the onset of the Holocene (10-13.5 kyr BP) are linked to dust size and in turn to wind strength and/or the path of the atmospheric trajectory. This may indicate that atmospheric circulation dictated the composition of the dust fallout to East Antarctica at that time. Although the dust concentrations remained fairly low, a notable return towards more glacial dust characteristics is recorded between 7.5 and 8.3 kyr BP. This happened concomitantly with a widespread cold event around 8 kyr BP that was 400-600 years long and suggests a moderate reactivation of the dust emission from the same potential source areas of the LGS. |
author2 |
Gabrielli, P Wegner, A Petit, J Delmonte, B De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C |
format |
Article in Journal/Newspaper |
author |
Gabrielli, P Wegner, A Petit, JR DELMONTE, BARBARA De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C. |
author_facet |
Gabrielli, P Wegner, A Petit, JR DELMONTE, BARBARA De Deckker, P Gaspari, V Fischer, H Ruth, U Kriews, M Boutron, C Cescon, P Barbante, C. |
author_sort |
Gabrielli, P |
title |
A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
title_short |
A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
title_full |
A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
title_fullStr |
A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
title_full_unstemmed |
A major glacial interglacial change in aeolian dust composition as inferred from Rare Earth Elements in Antarctic ice |
title_sort |
major glacial interglacial change in aeolian dust composition as inferred from rare earth elements in antarctic ice |
publisher |
Pergamon |
publishDate |
2010 |
url |
http://hdl.handle.net/10281/10368 https://doi.org/10.1016/j.quascirev.2009.09.002 |
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/wos/WOS:000274958000023 volume:29 issue:1-2 firstpage:265 lastpage:273 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/10368 doi:10.1016/j.quascirev.2009.09.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-73549124238 |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.09.002 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
1-2 |
container_start_page |
265 |
op_container_end_page |
273 |
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1796952448287375360 |