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...

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Published in:Scientific Reports
Main Authors: Vanneste, Heleen, de Vleeschouwer, François, Martínez-Cortizas, Antonio, von Scheffer, Clemens, Piotrowska, Natalia, Coronato, Andrea, Le Roux, Gaël
Other Authors: Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-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 de Toulouse (UT), 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
Language:English
Published: HAL CCSD 2015
Subjects:
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
id ftutoulouse3hal:oai:HAL:hal-01517029v1
record_format openpolar
institution Open Polar
collection Université Toulouse III - Paul Sabatier: HAL-UPS
op_collection_id ftutoulouse3hal
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 - CNRS Ecologie et Environnement (INEE-CNRS)
Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3)
Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP)
Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3)
Université de Toulouse (UT)-Université de Toulouse (UT)-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 de Toulouse (UT)
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
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
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spelling ftutoulouse3hal:oai:HAL:hal-01517029v1 2024-09-15T17:45:12+00:00 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 - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-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 de Toulouse (UT) 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 ftutoulouse3hal https://doi.org/10.1038/srep11670 2024-06-25T00:22:00Z 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 Toulouse III - Paul Sabatier: HAL-UPS Scientific Reports 5 1