Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean
International audience CARIOCA drifters and ship data from several cruises in the Subantarctic Zone (SAZ) of the Pacific Ocean, approximately 40°S-55°S, have been used in order to investigate surface CO 2 partial pressure (pCO 2 ) and dissolved inorganic carbon (DIC) patterns. The highest DIC values...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2011
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307/document https://hal.archives-ouvertes.fr/hal-00758307/file/2010GB003818.pdf https://doi.org/10.1029/2010GB003818 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
topic |
[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] Barbero, Leticia Boutin, Jacqueline Merlivat, Liliane Martin, Nicolas Takahashi, Taro Sutherland, Stewart C. Wanninkhof, Rik H. Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
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 CARIOCA drifters and ship data from several cruises in the Subantarctic Zone (SAZ) of the Pacific Ocean, approximately 40°S-55°S, have been used in order to investigate surface CO 2 partial pressure (pCO 2 ) and dissolved inorganic carbon (DIC) patterns. The highest DIC values were determined in regions of deep water formation, characterized by deep mixed layer depths (MLD) as estimated from Argo float profiles. As a result, these areas act as sources of CO 2 to the atmosphere. Using an empirical linear relationship between DIC, sea surface temperature (SST), and MLD, we then combine DIC with AT based on salinity and compute pCO 2 . Finally, we derive monthly fields of air-sea CO 2 flux in the SAZ. Our fit predicts the existence of a realistic seasonal cycle, close to equilibrium with the atmosphere in winter and a sink when biological activity takes place. It also reproduces the impact that deep water formation regions close to the Subantarctic Front (SAF) and in the eastern part of the SAZ have on the uptake capacity of the area. These areas, undersampled in previous studies, have high pCO 2 , and as a result, our estimates (0.05 ± 0.03 PgC yr -1 ) indicate that the Pacific SAZ acts as a weaker sink of CO 2 than suggested by previous studies which neglect these source regions. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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 |
Barbero, Leticia Boutin, Jacqueline Merlivat, Liliane Martin, Nicolas Takahashi, Taro Sutherland, Stewart C. Wanninkhof, Rik H. |
author_facet |
Barbero, Leticia Boutin, Jacqueline Merlivat, Liliane Martin, Nicolas Takahashi, Taro Sutherland, Stewart C. Wanninkhof, Rik H. |
author_sort |
Barbero, Leticia |
title |
Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
title_short |
Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
title_full |
Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
title_fullStr |
Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
title_full_unstemmed |
Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean |
title_sort |
importance of water mass formation regions for the air-sea co 2 flux estimate in the southern ocean |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307/document https://hal.archives-ouvertes.fr/hal-00758307/file/2010GB003818.pdf https://doi.org/10.1029/2010GB003818 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-00758307 Global Biogeochemical Cycles, American Geophysical Union, 2011, 25, pp.1005. ⟨10.1029/2010GB003818⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GB003818 hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307/document https://hal.archives-ouvertes.fr/hal-00758307/file/2010GB003818.pdf BIBCODE: 2011GBioC.25B1005B doi:10.1029/2010GB003818 WOS: 000287040300001 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010GB003818 |
container_title |
Global Biogeochemical Cycles |
container_volume |
25 |
container_issue |
1 |
container_start_page |
n/a |
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spelling |
ftccsdartic:oai:HAL:hal-00758307v1 2023-05-15T18:25:41+02:00 Importance of water mass formation regions for the air-sea CO 2 flux estimate in the Southern Ocean Barbero, Leticia Boutin, Jacqueline Merlivat, Liliane Martin, Nicolas Takahashi, Taro Sutherland, Stewart C. Wanninkhof, Rik H. Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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) 2011-02 https://hal.archives-ouvertes.fr/hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307/document https://hal.archives-ouvertes.fr/hal-00758307/file/2010GB003818.pdf https://doi.org/10.1029/2010GB003818 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GB003818 hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307 https://hal.archives-ouvertes.fr/hal-00758307/document https://hal.archives-ouvertes.fr/hal-00758307/file/2010GB003818.pdf BIBCODE: 2011GBioC.25B1005B doi:10.1029/2010GB003818 WOS: 000287040300001 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-00758307 Global Biogeochemical Cycles, American Geophysical Union, 2011, 25, pp.1005. ⟨10.1029/2010GB003818⟩ [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 2011 ftccsdartic https://doi.org/10.1029/2010GB003818 2021-12-04T23:47:29Z International audience CARIOCA drifters and ship data from several cruises in the Subantarctic Zone (SAZ) of the Pacific Ocean, approximately 40°S-55°S, have been used in order to investigate surface CO 2 partial pressure (pCO 2 ) and dissolved inorganic carbon (DIC) patterns. The highest DIC values were determined in regions of deep water formation, characterized by deep mixed layer depths (MLD) as estimated from Argo float profiles. As a result, these areas act as sources of CO 2 to the atmosphere. Using an empirical linear relationship between DIC, sea surface temperature (SST), and MLD, we then combine DIC with AT based on salinity and compute pCO 2 . Finally, we derive monthly fields of air-sea CO 2 flux in the SAZ. Our fit predicts the existence of a realistic seasonal cycle, close to equilibrium with the atmosphere in winter and a sink when biological activity takes place. It also reproduces the impact that deep water formation regions close to the Subantarctic Front (SAF) and in the eastern part of the SAZ have on the uptake capacity of the area. These areas, undersampled in previous studies, have high pCO 2 , and as a result, our estimates (0.05 ± 0.03 PgC yr -1 ) indicate that the Pacific SAZ acts as a weaker sink of CO 2 than suggested by previous studies which neglect these source regions. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Southern Ocean Global Biogeochemical Cycles 25 1 n/a n/a |