Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial
International audience Surface ocean circulation in the western equatorial Atlantic is mainly wind driven and plays a major role for the transport of warm waters to the North Atlantic. Past changes in the strength and direction of the trade winds are well documented, but the response of the western...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-02181008 https://hal.science/hal-02181008/document https://hal.science/hal-02181008/file/2018PA003437.pdf https://doi.org/10.1029/2018PA003437 |
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Open Polar |
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Archives ouvertes de Paris-Saclay |
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language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Venancio, I., M Mulitza, S. Govin, A. Santos, T., P Lessa, D. O. Albuquerque, A. L. S. Chiessi, C., M Tiedemann, R. Vahlenkamp, M. Bickert, T. Schulz, M Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Surface ocean circulation in the western equatorial Atlantic is mainly wind driven and plays a major role for the transport of warm waters to the North Atlantic. Past changes in the strength and direction of the trade winds are well documented, but the response of the western equatorial Atlantic circulation and water column structure to these changes is unclear. Here we used the difference between the stable isotopic oxygen composition of two species of planktonic foraminifera (Globigerinoides ruber white and Neogloboquadrina dutertrei) from two sediment cores collected off northeastern Brazil to investigate millennial-and orbital-scale changes in upper ocean stratification since the Last Interglacial. Our records indicate enhanced upper ocean stratification during several Heinrich stadials, partly due to a shoaling of the thermocline, which was linked to a decrease in the strength of southeast trades winds. In addition, we show that a decrease in wind zonality induced by increases in Northern Hemisphere low-latitude summer insolation causes a shoaling of the thermocline in the western equatorial Atlantic. These ocean-atmosphere changes contributed to a reduction in the cross-equatorial transport of warm waters, particularly during Heinrich stadials and Marine Isotope Stage 4. |
author2 |
Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Climat et Magnétisme (CLIMAG) 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)-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) Universidade Federal Fluminense Rio de Janeiro (UFF) Universidade de São Paulo = University of São Paulo (USP) 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 |
format |
Article in Journal/Newspaper |
author |
Venancio, I., M Mulitza, S. Govin, A. Santos, T., P Lessa, D. O. Albuquerque, A. L. S. Chiessi, C., M Tiedemann, R. Vahlenkamp, M. Bickert, T. Schulz, M |
author_facet |
Venancio, I., M Mulitza, S. Govin, A. Santos, T., P Lessa, D. O. Albuquerque, A. L. S. Chiessi, C., M Tiedemann, R. Vahlenkamp, M. Bickert, T. Schulz, M |
author_sort |
Venancio, I., M |
title |
Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
title_short |
Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
title_full |
Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
title_fullStr |
Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
title_full_unstemmed |
Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial |
title_sort |
millennial- to orbital-scale responses of western equatorial atlantic thermocline depth to changes in the trade wind system since the last interglacial |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02181008 https://hal.science/hal-02181008/document https://hal.science/hal-02181008/file/2018PA003437.pdf https://doi.org/10.1029/2018PA003437 |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02181008 Paleoceanography and Paleoclimatology, 2018, 33 (12), pp.1490-1507. ⟨10.1029/2018PA003437⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018PA003437 hal-02181008 https://hal.science/hal-02181008 https://hal.science/hal-02181008/document https://hal.science/hal-02181008/file/2018PA003437.pdf doi:10.1029/2018PA003437 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018PA003437 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
33 |
container_issue |
12 |
container_start_page |
1490 |
op_container_end_page |
1507 |
_version_ |
1812179388024750080 |
spelling |
ftuniparissaclay:oai:HAL:hal-02181008v1 2024-10-06T13:51:12+00:00 Millennial- to Orbital-Scale Responses of Western Equatorial Atlantic Thermocline Depth to Changes in the Trade Wind System Since the Last Interglacial Venancio, I., M Mulitza, S. Govin, A. Santos, T., P Lessa, D. O. Albuquerque, A. L. S. Chiessi, C., M Tiedemann, R. Vahlenkamp, M. Bickert, T. Schulz, M Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Climat et Magnétisme (CLIMAG) 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)-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) Universidade Federal Fluminense Rio de Janeiro (UFF) Universidade de São Paulo = University of São Paulo (USP) 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 2018 https://hal.science/hal-02181008 https://hal.science/hal-02181008/document https://hal.science/hal-02181008/file/2018PA003437.pdf https://doi.org/10.1029/2018PA003437 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2018PA003437 hal-02181008 https://hal.science/hal-02181008 https://hal.science/hal-02181008/document https://hal.science/hal-02181008/file/2018PA003437.pdf doi:10.1029/2018PA003437 info:eu-repo/semantics/OpenAccess ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02181008 Paleoceanography and Paleoclimatology, 2018, 33 (12), pp.1490-1507. ⟨10.1029/2018PA003437⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2018 ftuniparissaclay https://doi.org/10.1029/2018PA003437 2024-09-06T00:30:30Z International audience Surface ocean circulation in the western equatorial Atlantic is mainly wind driven and plays a major role for the transport of warm waters to the North Atlantic. Past changes in the strength and direction of the trade winds are well documented, but the response of the western equatorial Atlantic circulation and water column structure to these changes is unclear. Here we used the difference between the stable isotopic oxygen composition of two species of planktonic foraminifera (Globigerinoides ruber white and Neogloboquadrina dutertrei) from two sediment cores collected off northeastern Brazil to investigate millennial-and orbital-scale changes in upper ocean stratification since the Last Interglacial. Our records indicate enhanced upper ocean stratification during several Heinrich stadials, partly due to a shoaling of the thermocline, which was linked to a decrease in the strength of southeast trades winds. In addition, we show that a decrease in wind zonality induced by increases in Northern Hemisphere low-latitude summer insolation causes a shoaling of the thermocline in the western equatorial Atlantic. These ocean-atmosphere changes contributed to a reduction in the cross-equatorial transport of warm waters, particularly during Heinrich stadials and Marine Isotope Stage 4. Article in Journal/Newspaper North Atlantic Planktonic foraminifera Archives ouvertes de Paris-Saclay Paleoceanography and Paleoclimatology 33 12 1490 1507 |