A major glacial-interglacial change in aeolian dust composition 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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ftunivbern:oai:boris.unibe.ch:4607 2023-08-20T04:01:30+02:00 A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice Gabrielli, Paolo Wegner, Anna Petit, Jean Robert Delmonte, Barbara De Deckker, Patrick Gaspari, Vania Fischer, Hubertus Ruth, Urs Kriews, Michael Boutron, Claude Cescon, Paolo Barbante, Carlo 2010 application/pdf https://boris.unibe.ch/4607/1/1-s2.0-S0277379109002947-main.pdf https://boris.unibe.ch/4607/ eng eng Pergamon https://boris.unibe.ch/4607/ info:eu-repo/semantics/restrictedAccess Gabrielli, Paolo; Wegner, Anna; Petit, Jean Robert; Delmonte, Barbara; De Deckker, Patrick; Gaspari, Vania; Fischer, Hubertus; Ruth, Urs; Kriews, Michael; Boutron, Claude; Cescon, Paolo; Barbante, Carlo (2010). A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice. Quaternary Science Reviews, 29(1-2), pp. 265-273. Oxford: Pergamon 10.1016/j.quascirev.2009.09.002 <http://dx.doi.org/10.1016/j.quascirev.2009.09.002> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2010 ftunivbern https://doi.org/10.1016/j.quascirev.2009.09.002 2023-07-31T20:27:00Z 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 BORIS (Bern Open Repository and Information System, University of Bern) Antarctic East Antarctica Quaternary Science Reviews 29 1-2 265 273 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Gabrielli, Paolo Wegner, Anna Petit, Jean Robert Delmonte, Barbara De Deckker, Patrick Gaspari, Vania Fischer, Hubertus Ruth, Urs Kriews, Michael Boutron, Claude Cescon, Paolo Barbante, Carlo A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
topic_facet |
530 Physics |
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. |
format |
Article in Journal/Newspaper |
author |
Gabrielli, Paolo Wegner, Anna Petit, Jean Robert Delmonte, Barbara De Deckker, Patrick Gaspari, Vania Fischer, Hubertus Ruth, Urs Kriews, Michael Boutron, Claude Cescon, Paolo Barbante, Carlo |
author_facet |
Gabrielli, Paolo Wegner, Anna Petit, Jean Robert Delmonte, Barbara De Deckker, Patrick Gaspari, Vania Fischer, Hubertus Ruth, Urs Kriews, Michael Boutron, Claude Cescon, Paolo Barbante, Carlo |
author_sort |
Gabrielli, Paolo |
title |
A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
title_short |
A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
title_full |
A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
title_fullStr |
A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
title_full_unstemmed |
A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice |
title_sort |
major glacial-interglacial change in aeolian dust composition inferred from rare earth elements in antarctic ice |
publisher |
Pergamon |
publishDate |
2010 |
url |
https://boris.unibe.ch/4607/1/1-s2.0-S0277379109002947-main.pdf https://boris.unibe.ch/4607/ |
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_source |
Gabrielli, Paolo; Wegner, Anna; Petit, Jean Robert; Delmonte, Barbara; De Deckker, Patrick; Gaspari, Vania; Fischer, Hubertus; Ruth, Urs; Kriews, Michael; Boutron, Claude; Cescon, Paolo; Barbante, Carlo (2010). A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice. Quaternary Science Reviews, 29(1-2), pp. 265-273. Oxford: Pergamon 10.1016/j.quascirev.2009.09.002 <http://dx.doi.org/10.1016/j.quascirev.2009.09.002> |
op_relation |
https://boris.unibe.ch/4607/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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 |
_version_ |
1774724768973455360 |