Radiocarbon as a thermocline proxy for the eastern equatorial Pacific
[1] An ocean model is used to test the idea that sea surface Δ 14 C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes Δ 14 C as a passive tracer, has been forced with reanalysis fluxes over 1948-1999, and the output is compared with a previously report...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2004
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Subjects: | |
Online Access: | https://hal.science/hal-00154546 https://hal.science/hal-00154546/document https://hal.science/hal-00154546/file/2004GL019764.pdf https://doi.org/10.1029/2004GL019764 |
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Open Polar |
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Université de Bretagne Occidentale: HAL |
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English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkès, Christophe E. Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, D. P. Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
[1] An ocean model is used to test the idea that sea surface Δ 14 C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes Δ 14 C as a passive tracer, has been forced with reanalysis fluxes over 1948-1999, and the output is compared with a previously reported Galapagos Δ 14 C record. The model reproduces the abrupt increase in the seasonally minimum Δ 14 C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline. |
author2 |
Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) 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)-Observatoire Midi-Pyrénées (OMP) 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) 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) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) 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)) |
format |
Article in Journal/Newspaper |
author |
Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkès, Christophe E. Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, D. P. |
author_facet |
Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkès, Christophe E. Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, D. P. |
author_sort |
Rodgers, Keith B. |
title |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_short |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_full |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_fullStr |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_full_unstemmed |
Radiocarbon as a thermocline proxy for the eastern equatorial Pacific |
title_sort |
radiocarbon as a thermocline proxy for the eastern equatorial pacific |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00154546 https://hal.science/hal-00154546/document https://hal.science/hal-00154546/file/2004GL019764.pdf https://doi.org/10.1029/2004GL019764 |
geographic |
Antarctic Galapagos Pacific |
geographic_facet |
Antarctic Galapagos Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00154546 Geophysical Research Letters, 2004, 31, pp.L14314. ⟨10.1029/2004GL019764⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL019764 hal-00154546 https://hal.science/hal-00154546 https://hal.science/hal-00154546/document https://hal.science/hal-00154546/file/2004GL019764.pdf doi:10.1029/2004GL019764 WOS: 000223185300001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2004GL019764 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
14 |
_version_ |
1809825233896472576 |
spelling |
ftunivbrest:oai:HAL:hal-00154546v1 2024-09-09T19:10:20+00:00 Radiocarbon as a thermocline proxy for the eastern equatorial Pacific Rodgers, Keith B. Aumont, Olivier Madec, Gurvan Menkès, Christophe E. Blanke, Bruno Monfray, Patrick Orr, James C. Schrag, D. P. Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) 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)-Observatoire Midi-Pyrénées (OMP) 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) 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) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) 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)) 2004 https://hal.science/hal-00154546 https://hal.science/hal-00154546/document https://hal.science/hal-00154546/file/2004GL019764.pdf https://doi.org/10.1029/2004GL019764 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL019764 hal-00154546 https://hal.science/hal-00154546 https://hal.science/hal-00154546/document https://hal.science/hal-00154546/file/2004GL019764.pdf doi:10.1029/2004GL019764 WOS: 000223185300001 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00154546 Geophysical Research Letters, 2004, 31, pp.L14314. ⟨10.1029/2004GL019764⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2004 ftunivbrest https://doi.org/10.1029/2004GL019764 2024-06-18T14:09:37Z [1] An ocean model is used to test the idea that sea surface Δ 14 C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes Δ 14 C as a passive tracer, has been forced with reanalysis fluxes over 1948-1999, and the output is compared with a previously reported Galapagos Δ 14 C record. The model reproduces the abrupt increase in the seasonally minimum Δ 14 C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline. Article in Journal/Newspaper Antarc* Antarctic Université de Bretagne Occidentale: HAL Antarctic Galapagos Pacific Geophysical Research Letters 31 14 |