Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile
International audience High-temporal resolution of pollen analyses from marine core MD07-3088 (46°S) documents regional and coastal vegetation changes in the mid-latitude of southern Chile during the last 22 kyr BP. The coastal margin was partly ice-free during the last glacial period with the prese...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00744557 https://doi.org/10.1016/j.palaeo.2012.11.001 |
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ftunivnantes:oai:HAL:hal-00744557v1 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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English |
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Panoply [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
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Panoply [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Montade, V. Combourieu-Nebout, N. Kissel, C. Haberle, S. Siani, G. Michel, E. Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
topic_facet |
Panoply [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience High-temporal resolution of pollen analyses from marine core MD07-3088 (46°S) documents regional and coastal vegetation changes in the mid-latitude of southern Chile during the last 22 kyr BP. The coastal margin was partly ice-free during the last glacial period with the presence of scattered vegetation. After ~ 17.6 kyr BP, the expansion of Nothofagus woodland highlights a warming trend and marks the beginning of the last deglaciation. The deglacial forest expansion is interrupted by the development of Magellanic moorland simultaneously with the Antarctic Cold Reversal. This vegetation change illustrates a pause in the warming trend with an abrupt increase in precipitation which is related to strong intensity of Southern Westerly Winds. After 12.8 kyr BP, the retreat of Magellanic moorland illustrates a second-step warming that is strengthened after 11.5 kyr at the onset of the Holocene. Expansion of heliophytic taxa illustrates warmest and driest conditions of the Holocene from 11 to 7.4 kyr BP. Later, the decrease of heliophytic taxa shows a return to cooler and wetter conditions, illustrated by the presence of the North Patagonian rainforest that reaches modern condition after 5 kyr. Climate changes inferred from the marine pollen record are consistent with geochemical data changes from the same samples and illustrate a clear synchronicity with δD variations of EPICA Dome C ice core during the last deglaciation and Holocene. Comparison between vegetation changes from the marine core and regional palaeoclimatic records highlights southward-northward shifts of the Southern Westerly Wind belt and supports a close link between Southern Westerly Wind belt and atmospheric CO2 variability during the last deglaciation. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Climat et Magnétisme (CLIMAG) Australian National University (ANU) Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Montade, V. Combourieu-Nebout, N. Kissel, C. Haberle, S. Siani, G. Michel, E. |
author_facet |
Montade, V. Combourieu-Nebout, N. Kissel, C. Haberle, S. Siani, G. Michel, E. |
author_sort |
Montade, V. |
title |
Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
title_short |
Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
title_full |
Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
title_fullStr |
Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
title_full_unstemmed |
Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile |
title_sort |
vegetation and climate changes during the last 22,000 yr from a marine core near taitao peninsula, southern chile |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-00744557 https://doi.org/10.1016/j.palaeo.2012.11.001 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic EPICA ice core |
genre_facet |
Antarc* Antarctic EPICA ice core |
op_source |
ISSN: 0031-0182 Palaeogeography, Palaeoclimatology, Palaeoecology https://hal.archives-ouvertes.fr/hal-00744557 Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier, 2013, 369:, pp.335-348. ⟨10.1016/j.palaeo.2012.11.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2012.11.001 hal-00744557 https://hal.archives-ouvertes.fr/hal-00744557 doi:10.1016/j.palaeo.2012.11.001 |
op_doi |
https://doi.org/10.1016/j.palaeo.2012.11.001 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
369 |
container_start_page |
335 |
op_container_end_page |
348 |
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1766021468715483136 |
spelling |
ftunivnantes:oai:HAL:hal-00744557v1 2023-05-15T13:31:51+02:00 Vegetation and climate changes during the last 22,000 yr from a marine core near Taitao Peninsula, southern Chile Montade, V. Combourieu-Nebout, N. Kissel, C. Haberle, S. Siani, G. Michel, E. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Climat et Magnétisme (CLIMAG) Australian National University (ANU) Interactions et dynamique des environnements de surface (IDES) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.archives-ouvertes.fr/hal-00744557 https://doi.org/10.1016/j.palaeo.2012.11.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2012.11.001 hal-00744557 https://hal.archives-ouvertes.fr/hal-00744557 doi:10.1016/j.palaeo.2012.11.001 ISSN: 0031-0182 Palaeogeography, Palaeoclimatology, Palaeoecology https://hal.archives-ouvertes.fr/hal-00744557 Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier, 2013, 369:, pp.335-348. ⟨10.1016/j.palaeo.2012.11.001⟩ Panoply [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.1016/j.palaeo.2012.11.001 2022-10-18T22:48:07Z International audience High-temporal resolution of pollen analyses from marine core MD07-3088 (46°S) documents regional and coastal vegetation changes in the mid-latitude of southern Chile during the last 22 kyr BP. The coastal margin was partly ice-free during the last glacial period with the presence of scattered vegetation. After ~ 17.6 kyr BP, the expansion of Nothofagus woodland highlights a warming trend and marks the beginning of the last deglaciation. The deglacial forest expansion is interrupted by the development of Magellanic moorland simultaneously with the Antarctic Cold Reversal. This vegetation change illustrates a pause in the warming trend with an abrupt increase in precipitation which is related to strong intensity of Southern Westerly Winds. After 12.8 kyr BP, the retreat of Magellanic moorland illustrates a second-step warming that is strengthened after 11.5 kyr at the onset of the Holocene. Expansion of heliophytic taxa illustrates warmest and driest conditions of the Holocene from 11 to 7.4 kyr BP. Later, the decrease of heliophytic taxa shows a return to cooler and wetter conditions, illustrated by the presence of the North Patagonian rainforest that reaches modern condition after 5 kyr. Climate changes inferred from the marine pollen record are consistent with geochemical data changes from the same samples and illustrate a clear synchronicity with δD variations of EPICA Dome C ice core during the last deglaciation and Holocene. Comparison between vegetation changes from the marine core and regional palaeoclimatic records highlights southward-northward shifts of the Southern Westerly Wind belt and supports a close link between Southern Westerly Wind belt and atmospheric CO2 variability during the last deglaciation. Article in Journal/Newspaper Antarc* Antarctic EPICA ice core Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Palaeogeography, Palaeoclimatology, Palaeoecology 369 335 348 |