Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America
International audience Atmospheric dust loadings play a crucial role in the global climate system. Southern South America is a key dust source, however, dust deposition rates remain poorly quantified since the last glacial termination (~17 kyr ago), an important timeframe to anticipate future climat...
Published in: | Scientific Reports |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://hal.science/hal-01517029 https://hal.science/hal-01517029/document https://hal.science/hal-01517029/file/vanneste_17701.pdf https://doi.org/10.1038/srep11670 |
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ftunivnantes:oai:HAL:hal-01517029v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Tierra del Fuego Dust Winds Westerlies Mineral dust Peatlands Holocene Glaciers [SDE.IE]Environmental Sciences/Environmental Engineering [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
Tierra del Fuego Dust Winds Westerlies Mineral dust Peatlands Holocene Glaciers [SDE.IE]Environmental Sciences/Environmental Engineering [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Vanneste, Heleen de Vleeschouwer, François Martínez-Cortizas, Antonio von Scheffer, Clemens Piotrowska, Natalia Coronato, Andrea Le Roux, Gaël Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
topic_facet |
Tierra del Fuego Dust Winds Westerlies Mineral dust Peatlands Holocene Glaciers [SDE.IE]Environmental Sciences/Environmental Engineering [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Atmospheric dust loadings play a crucial role in the global climate system. Southern South America is a key dust source, however, dust deposition rates remain poorly quantified since the last glacial termination (~17 kyr ago), an important timeframe to anticipate future climate changes. Here we use isotope and element geochemistry in a peat archive from Tierra del Fuego, to reconstruct atmospheric dust fluxes and associated environmental and westerly wind changes for the past 16.2 kyr. Dust depositions were elevated during the Antarctic Cold Reversal (ACR) and second half of the Younger Dryas (YD) stadial, originating from the glacial Beagle Channel valley. This increase was most probably associated with a strengthening of the westerlies during both periods as dust source areas were already available before the onset of the dust peaks and remained present throughout. Congruent with glacier advances across Patagonia, this dust record indicates an overall strengthening of the wind belt during the ACR. On the other hand, we argue that the YD dust peak is linked to strong and poleward shifted westerlies. The close interplay between dust fluxes and climatic changes demonstrates that atmospheric circulation was essential in generating and sustaining present-day interglacial conditions. |
author2 |
Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées Universidade de Santiago de Compostela Spain (USC ) Silesian University of Technology Centro Austral de Investigaciones Científicas Ushuaia (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET) |
format |
Article in Journal/Newspaper |
author |
Vanneste, Heleen de Vleeschouwer, François Martínez-Cortizas, Antonio von Scheffer, Clemens Piotrowska, Natalia Coronato, Andrea Le Roux, Gaël |
author_facet |
Vanneste, Heleen de Vleeschouwer, François Martínez-Cortizas, Antonio von Scheffer, Clemens Piotrowska, Natalia Coronato, Andrea Le Roux, Gaël |
author_sort |
Vanneste, Heleen |
title |
Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
title_short |
Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
title_full |
Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
title_fullStr |
Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
title_full_unstemmed |
Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America |
title_sort |
late-glacial elevated dust deposition linked to westerly wind shifts in southern south america |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01517029 https://hal.science/hal-01517029/document https://hal.science/hal-01517029/file/vanneste_17701.pdf https://doi.org/10.1038/srep11670 |
geographic |
Antarctic Patagonia The Antarctic |
geographic_facet |
Antarctic Patagonia The Antarctic |
genre |
Antarc* Antarctic Tierra del Fuego |
genre_facet |
Antarc* Antarctic Tierra del Fuego |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-01517029 Scientific Reports, 2015, vol. 5, pp. 11670-11680. ⟨10.1038/srep11670⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/srep11670 hal-01517029 https://hal.science/hal-01517029 https://hal.science/hal-01517029/document https://hal.science/hal-01517029/file/vanneste_17701.pdf doi:10.1038/srep11670 OATAO: 17701 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/srep11670 |
container_title |
Scientific Reports |
container_volume |
5 |
container_issue |
1 |
_version_ |
1766268796507521024 |
spelling |
ftunivnantes:oai:HAL:hal-01517029v1 2023-05-15T13:59:52+02:00 Late-glacial elevated dust deposition linked to westerly wind shifts in southern South America Vanneste, Heleen de Vleeschouwer, François Martínez-Cortizas, Antonio von Scheffer, Clemens Piotrowska, Natalia Coronato, Andrea Le Roux, Gaël Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées Universidade de Santiago de Compostela Spain (USC ) Silesian University of Technology Centro Austral de Investigaciones Científicas Ushuaia (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET) 2015-07-01 https://hal.science/hal-01517029 https://hal.science/hal-01517029/document https://hal.science/hal-01517029/file/vanneste_17701.pdf https://doi.org/10.1038/srep11670 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/srep11670 hal-01517029 https://hal.science/hal-01517029 https://hal.science/hal-01517029/document https://hal.science/hal-01517029/file/vanneste_17701.pdf doi:10.1038/srep11670 OATAO: 17701 info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-01517029 Scientific Reports, 2015, vol. 5, pp. 11670-11680. ⟨10.1038/srep11670⟩ Tierra del Fuego Dust Winds Westerlies Mineral dust Peatlands Holocene Glaciers [SDE.IE]Environmental Sciences/Environmental Engineering [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1038/srep11670 2023-02-22T09:55:15Z International audience Atmospheric dust loadings play a crucial role in the global climate system. Southern South America is a key dust source, however, dust deposition rates remain poorly quantified since the last glacial termination (~17 kyr ago), an important timeframe to anticipate future climate changes. Here we use isotope and element geochemistry in a peat archive from Tierra del Fuego, to reconstruct atmospheric dust fluxes and associated environmental and westerly wind changes for the past 16.2 kyr. Dust depositions were elevated during the Antarctic Cold Reversal (ACR) and second half of the Younger Dryas (YD) stadial, originating from the glacial Beagle Channel valley. This increase was most probably associated with a strengthening of the westerlies during both periods as dust source areas were already available before the onset of the dust peaks and remained present throughout. Congruent with glacier advances across Patagonia, this dust record indicates an overall strengthening of the wind belt during the ACR. On the other hand, we argue that the YD dust peak is linked to strong and poleward shifted westerlies. The close interplay between dust fluxes and climatic changes demonstrates that atmospheric circulation was essential in generating and sustaining present-day interglacial conditions. Article in Journal/Newspaper Antarc* Antarctic Tierra del Fuego Université de Nantes: HAL-UNIV-NANTES Antarctic Patagonia The Antarctic Scientific Reports 5 1 |