Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial
International audience The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudin...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.science/hal-01890530 https://doi.org/10.1016/j.quascirev.2018.06.023 |
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ftuniparissaclay:oai:HAL:hal-01890530v1 |
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openpolar |
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Open Polar |
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Archives ouvertes de Paris-Saclay |
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ftuniparissaclay |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Haddam, Naoufel Abdeldjalyl Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnerat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49 degrees S) from the onset of the deglaciation until 8 kyr cal. BP. (C) 2018 Elsevier Ltd. All rights reserved. |
author2 |
Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire de mesure du carbone 14 (LMC14 - UMS 2572) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS) Climat et Magnétisme (CLIMAG) |
format |
Article in Journal/Newspaper |
author |
Haddam, Naoufel Abdeldjalyl Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnerat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine |
author_facet |
Haddam, Naoufel Abdeldjalyl Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnerat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine |
author_sort |
Haddam, Naoufel Abdeldjalyl |
title |
Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
title_short |
Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
title_full |
Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
title_fullStr |
Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
title_full_unstemmed |
Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial |
title_sort |
changes in latitudinal sea surface temperature gradients along the southern chilean margin since the last glacial |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01890530 https://doi.org/10.1016/j.quascirev.2018.06.023 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-01890530 Quaternary Science Reviews, 2018, 194, pp.62 - 76. ⟨10.1016/j.quascirev.2018.06.023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2018.06.023 hal-01890530 https://hal.science/hal-01890530 doi:10.1016/j.quascirev.2018.06.023 |
op_doi |
https://doi.org/10.1016/j.quascirev.2018.06.023 |
container_title |
Quaternary Science Reviews |
container_volume |
194 |
container_start_page |
62 |
op_container_end_page |
76 |
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1812182450664636416 |
spelling |
ftuniparissaclay:oai:HAL:hal-01890530v1 2024-10-06T13:44:01+00:00 Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial Haddam, Naoufel Abdeldjalyl Siani, Giuseppe Michel, Elisabeth Kaiser, Jérôme Lamy, Frank Duchamp-Alphonse, Stéphanie Hefter, Jens Braconnot, Pascale Dewilde, Fabien Isguder, Gulay Tisnerat-Laborde, Nadine Thil, François Durand, Nicolas Kissel, Catherine Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire de mesure du carbone 14 (LMC14 - UMS 2572) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS) Climat et Magnétisme (CLIMAG) 2018-08 https://hal.science/hal-01890530 https://doi.org/10.1016/j.quascirev.2018.06.023 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2018.06.023 hal-01890530 https://hal.science/hal-01890530 doi:10.1016/j.quascirev.2018.06.023 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-01890530 Quaternary Science Reviews, 2018, 194, pp.62 - 76. ⟨10.1016/j.quascirev.2018.06.023⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2018 ftuniparissaclay https://doi.org/10.1016/j.quascirev.2018.06.023 2024-09-06T00:30:33Z International audience The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49 degrees S) from the onset of the deglaciation until 8 kyr cal. BP. (C) 2018 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Archives ouvertes de Paris-Saclay Antarctic Pacific Quaternary Science Reviews 194 62 76 |