Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades
International audience Observational studies report a rapid decline of ocean CO 2 uptake in the temperate North Atlantic during the last decade. We analyze these findings using ocean physical-biological numerical simulations forced with interannually varying atmospheric conditions for the period 197...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://hal.science/hal-00770583 https://hal.science/hal-00770583/document https://hal.science/hal-00770583/file/2007GB003167.pdf https://doi.org/10.1029/2007GB003167 |
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Université de Paris: Portail HAL |
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English |
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[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Thomas, Helmuth Friederike Prowe, A. E. Lima, Ivan D. Doney, Scott C. Wanninkhof, Rik H. Greatbatch, Richard J. Schuster, Ute Corbière, Antoine Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience Observational studies report a rapid decline of ocean CO 2 uptake in the temperate North Atlantic during the last decade. We analyze these findings using ocean physical-biological numerical simulations forced with interannually varying atmospheric conditions for the period 1979-2004. In the simulations, surface ocean water mass properties and CO 2 system variables exhibit substantial multiannual variability on sub-basin scales in response to wind-driven reorganization in ocean circulation and surface warming/cooling. The simulated temporal evolution of the ocean CO 2 system is broadly consistent with reported observational trends and is influenced substantially by the phase of the North Atlantic Oscillation (NAO). Many of the observational estimates cover a period after 1995 of mostly negative or weakly positive NAO conditions, which are characterized in the simulations by reduced North Atlantic Current transport of subtropical waters into the eastern basin and by a decline in CO 2 uptake. We suggest therefore that air-sea CO 2 uptake may rebound in the eastern temperate North Atlantic during future periods of more positive NAO, similar to the patterns found in our model for the sustained positive NAO period in the early 1990s. Thus, our analysis indicates that the recent rapid shifts in CO 2 flux reflect decadal perturbations superimposed on more gradual secular trends. The simulations highlight the need for long-term ocean carbon observations and modeling to fully resolve multiannual variability, which can obscure detection of the long-term changes associated with anthropogenic CO 2 uptake and climate change. |
author2 |
Department of Oceanography Halifax (DO) Dalhousie University Halifax Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-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 Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Thomas, Helmuth Friederike Prowe, A. E. Lima, Ivan D. Doney, Scott C. Wanninkhof, Rik H. Greatbatch, Richard J. Schuster, Ute Corbière, Antoine |
author_facet |
Thomas, Helmuth Friederike Prowe, A. E. Lima, Ivan D. Doney, Scott C. Wanninkhof, Rik H. Greatbatch, Richard J. Schuster, Ute Corbière, Antoine |
author_sort |
Thomas, Helmuth |
title |
Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
title_short |
Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
title_full |
Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
title_fullStr |
Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
title_full_unstemmed |
Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades |
title_sort |
changes in the north atlantic oscillation influence co 2 uptake in the north atlantic over the past 2 decades |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00770583 https://hal.science/hal-00770583/document https://hal.science/hal-00770583/file/2007GB003167.pdf https://doi.org/10.1029/2007GB003167 |
genre |
north atlantic current North Atlantic North Atlantic oscillation |
genre_facet |
north atlantic current North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-00770583 Global Biogeochemical Cycles, 2008, 22, pp.4027. ⟨10.1029/2007GB003167⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GB003167 hal-00770583 https://hal.science/hal-00770583 https://hal.science/hal-00770583/document https://hal.science/hal-00770583/file/2007GB003167.pdf BIBCODE: 2008GBioC.22.4027T doi:10.1029/2007GB003167 WOS: 000262169400001 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GB003167 |
container_title |
Global Biogeochemical Cycles |
container_volume |
22 |
container_issue |
4 |
container_start_page |
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ftunivparis:oai:HAL:hal-00770583v1 2024-05-19T07:44:25+00:00 Changes in the North Atlantic Oscillation influence CO 2 uptake in the North Atlantic over the past 2 decades Thomas, Helmuth Friederike Prowe, A. E. Lima, Ivan D. Doney, Scott C. Wanninkhof, Rik H. Greatbatch, Richard J. Schuster, Ute Corbière, Antoine Department of Oceanography Halifax (DO) Dalhousie University Halifax Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-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 Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2008-12 https://hal.science/hal-00770583 https://hal.science/hal-00770583/document https://hal.science/hal-00770583/file/2007GB003167.pdf https://doi.org/10.1029/2007GB003167 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GB003167 hal-00770583 https://hal.science/hal-00770583 https://hal.science/hal-00770583/document https://hal.science/hal-00770583/file/2007GB003167.pdf BIBCODE: 2008GBioC.22.4027T doi:10.1029/2007GB003167 WOS: 000262169400001 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-00770583 Global Biogeochemical Cycles, 2008, 22, pp.4027. ⟨10.1029/2007GB003167⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2008 ftunivparis https://doi.org/10.1029/2007GB003167 2024-04-23T03:38:45Z International audience Observational studies report a rapid decline of ocean CO 2 uptake in the temperate North Atlantic during the last decade. We analyze these findings using ocean physical-biological numerical simulations forced with interannually varying atmospheric conditions for the period 1979-2004. In the simulations, surface ocean water mass properties and CO 2 system variables exhibit substantial multiannual variability on sub-basin scales in response to wind-driven reorganization in ocean circulation and surface warming/cooling. The simulated temporal evolution of the ocean CO 2 system is broadly consistent with reported observational trends and is influenced substantially by the phase of the North Atlantic Oscillation (NAO). Many of the observational estimates cover a period after 1995 of mostly negative or weakly positive NAO conditions, which are characterized in the simulations by reduced North Atlantic Current transport of subtropical waters into the eastern basin and by a decline in CO 2 uptake. We suggest therefore that air-sea CO 2 uptake may rebound in the eastern temperate North Atlantic during future periods of more positive NAO, similar to the patterns found in our model for the sustained positive NAO period in the early 1990s. Thus, our analysis indicates that the recent rapid shifts in CO 2 flux reflect decadal perturbations superimposed on more gradual secular trends. The simulations highlight the need for long-term ocean carbon observations and modeling to fully resolve multiannual variability, which can obscure detection of the long-term changes associated with anthropogenic CO 2 uptake and climate change. Article in Journal/Newspaper north atlantic current North Atlantic North Atlantic oscillation Université de Paris: Portail HAL Global Biogeochemical Cycles 22 4 n/a n/a |