Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings
International audience Millennial-scale cooling events termed Heinrich Stadials punctuated Northern Hemisphere climate during the last glacial period. Latitudinal shifts of the intertropical convergence zone (ITCZ) are thought to have rapidly propagated these abrupt climatic signals southward, influ...
Published in: | Scientific Reports |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132/document https://hal.archives-ouvertes.fr/hal-01691132/file/srep44054.pdf https://doi.org/10.1038/srep44054 |
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ftccsdartic:oai:HAL:hal-01691132v1 2023-05-15T13:38:08+02:00 Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings Bayon, Germain De Deckker, Patrick Magee, John Germain, Yoan Bermell, Sylvain Tachikawa, Kazuyo Norman, Marc Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) Unité de recherche Géosciences Marines (Ifremer) (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) 2017-03-08 https://hal.archives-ouvertes.fr/hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132/document https://hal.archives-ouvertes.fr/hal-01691132/file/srep44054.pdf https://doi.org/10.1038/srep44054 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/srep44054 hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132/document https://hal.archives-ouvertes.fr/hal-01691132/file/srep44054.pdf doi:10.1038/srep44054 info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.archives-ouvertes.fr/hal-01691132 Scientific Reports, Nature Publishing Group, 2017, 7, ⟨10.1038/srep44054⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1038/srep44054 2021-11-07T03:03:44Z International audience Millennial-scale cooling events termed Heinrich Stadials punctuated Northern Hemisphere climate during the last glacial period. Latitudinal shifts of the intertropical convergence zone (ITCZ) are thought to have rapidly propagated these abrupt climatic signals southward, influencing the evolution of Southern Hemisphere climates and contributing to major reorganisation of the global ocean-atmosphere system. Here, we use neodymium isotopes from a marine sediment core to reconstruct the hydroclimatic evolution of subtropical Australia between 90 to 20 thousand years ago. We find a strong correlation between our sediment provenance proxy data and records for western Pacific tropical precipitations and Australian palaeolakes, which indicates that Northern Hemisphere cooling phases were accompanied by pronounced excursions of the ITCZ and associated rainfall as far south as about 32°S. Comparatively, however, each of these humid periods lasted substantially longer than the mean duration of Heinrich Stadials, overlapping with subsequent warming phases of the southern high-latitudes recorded in Antarctic ice cores. In addition to ITCZ-driven hydroclimate forcing, we infer that changes in Southern Ocean climate also played an important role in regulating late glacial atmospheric patterns of the Southern Hemisphere subtropical regions. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Pacific Southern Ocean Scientific Reports 7 1 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Bayon, Germain De Deckker, Patrick Magee, John Germain, Yoan Bermell, Sylvain Tachikawa, Kazuyo Norman, Marc Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Millennial-scale cooling events termed Heinrich Stadials punctuated Northern Hemisphere climate during the last glacial period. Latitudinal shifts of the intertropical convergence zone (ITCZ) are thought to have rapidly propagated these abrupt climatic signals southward, influencing the evolution of Southern Hemisphere climates and contributing to major reorganisation of the global ocean-atmosphere system. Here, we use neodymium isotopes from a marine sediment core to reconstruct the hydroclimatic evolution of subtropical Australia between 90 to 20 thousand years ago. We find a strong correlation between our sediment provenance proxy data and records for western Pacific tropical precipitations and Australian palaeolakes, which indicates that Northern Hemisphere cooling phases were accompanied by pronounced excursions of the ITCZ and associated rainfall as far south as about 32°S. Comparatively, however, each of these humid periods lasted substantially longer than the mean duration of Heinrich Stadials, overlapping with subsequent warming phases of the southern high-latitudes recorded in Antarctic ice cores. In addition to ITCZ-driven hydroclimate forcing, we infer that changes in Southern Ocean climate also played an important role in regulating late glacial atmospheric patterns of the Southern Hemisphere subtropical regions. |
author2 |
Research School of Earth Sciences Canberra (RSES) Australian National University (ANU) Unité de recherche Géosciences Marines (Ifremer) (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) |
format |
Article in Journal/Newspaper |
author |
Bayon, Germain De Deckker, Patrick Magee, John Germain, Yoan Bermell, Sylvain Tachikawa, Kazuyo Norman, Marc |
author_facet |
Bayon, Germain De Deckker, Patrick Magee, John Germain, Yoan Bermell, Sylvain Tachikawa, Kazuyo Norman, Marc |
author_sort |
Bayon, Germain |
title |
Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
title_short |
Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
title_full |
Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
title_fullStr |
Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
title_full_unstemmed |
Extensive wet episodes in Late Glacial Australia resulting from high-latitude forcings |
title_sort |
extensive wet episodes in late glacial australia resulting from high-latitude forcings |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132/document https://hal.archives-ouvertes.fr/hal-01691132/file/srep44054.pdf https://doi.org/10.1038/srep44054 |
geographic |
Antarctic Pacific Southern Ocean |
geographic_facet |
Antarctic Pacific Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.archives-ouvertes.fr/hal-01691132 Scientific Reports, Nature Publishing Group, 2017, 7, ⟨10.1038/srep44054⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/srep44054 hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132 https://hal.archives-ouvertes.fr/hal-01691132/document https://hal.archives-ouvertes.fr/hal-01691132/file/srep44054.pdf doi:10.1038/srep44054 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/srep44054 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1766101749051949056 |