Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods
The Southern Ocean is thought to play an important role in the context of global warming and anthropogenic emissions of CO 2 due to its high sensitivity to both climate change and changes in the carbon cycle. Assessing the penetration of anthropogenic CO 2 (C ant) into the Southern Ocean is therefor...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2005
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Online Access: | https://doi.org/10.1029/2004JC002571 https://hal.archives-ouvertes.fr/hal-00124678/file/2004JC002571.pdf https://hal.archives-ouvertes.fr/hal-00124678 |
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institution |
Open Polar |
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fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo Lo Monaco, Claire Goyet, Catherine Metzl, Nicolas Poisson, Alain Touratier, Franck Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
topic_facet |
envir geo |
description |
The Southern Ocean is thought to play an important role in the context of global warming and anthropogenic emissions of CO 2 due to its high sensitivity to both climate change and changes in the carbon cycle. Assessing the penetration of anthropogenic CO 2 (C ant) into the Southern Ocean is therefore highly relevant to reduce the uncertainties attached to both the present knowledge of anthropogenic carbon inventories and predictions made by current ocean carbon models. This study compares different databased approaches for estimating the distribution of C ant in the ocean: a recently developed method based on the composite Tracer Combining Oxygen, Inorganic Carbon, and Total Alkalinity (TrOCA) and the ''historical'' back-calculation methods (the so-called DC* and preformed dissolved inorganic carbon methods). Note that the back-calculation technique requires special care when used in the Southern Ocean, where surface oxygen can significantly deviate from equilibrium with the atmosphere. All three methods were applied to data collected at the Indian-Atlantic boundary (WOCE line I6), where significant transient tracer concentrations were observed in deep and bottom waters. North of 50°S, distribution and inventories of C ant are coherent with previous data-based and model estimates, but we found larger storage of C ant south of 50°S as compared to the midlatitude region. In that, our results disagree with most previous estimates and suggest that the global inventory of anthropogenic CO 2 in the Southern Ocean could be much larger than what is currently believed. |
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) Laboratoire de Biophysique et Dynamique des Systèmes Intégrés (BDSI) Université de Perpignan Via Domitia (UPVD) |
format |
Article in Journal/Newspaper |
author |
Lo Monaco, Claire Goyet, Catherine Metzl, Nicolas Poisson, Alain Touratier, Franck |
author_facet |
Lo Monaco, Claire Goyet, Catherine Metzl, Nicolas Poisson, Alain Touratier, Franck |
author_sort |
Lo Monaco, Claire |
title |
Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
title_short |
Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
title_full |
Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
title_fullStr |
Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
title_full_unstemmed |
Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods |
title_sort |
distribution and inventory of anthropogenic co2 in the southern ocean: comparison of three data-based methods |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://doi.org/10.1029/2004JC002571 https://hal.archives-ouvertes.fr/hal-00124678/file/2004JC002571.pdf https://hal.archives-ouvertes.fr/hal-00124678 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research Journal of Geophysical Research, American Geophysical Union, 2005, 110, pp.C09S02. ⟨10.1029/2004JC002571⟩ |
op_relation |
hal-00124678 BIBCODE: 2005JGRC.110.9S02L doi:10.1029/2004JC002571 10670/1.rl9iqq https://hal.archives-ouvertes.fr/hal-00124678/file/2004JC002571.pdf https://hal.archives-ouvertes.fr/hal-00124678 |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2004JC002571 |
container_title |
Journal of Geophysical Research |
container_volume |
110 |
container_issue |
C9 |
_version_ |
1766204799749980160 |
spelling |
fttriple:oai:gotriple.eu:10670/1.rl9iqq 2023-05-15T18:24:21+02:00 Distribution and inventory of anthropogenic CO2 in the Southern Ocean: Comparison of three data-based methods Lo Monaco, Claire Goyet, Catherine Metzl, Nicolas Poisson, Alain Touratier, Franck 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) Laboratoire de Biophysique et Dynamique des Systèmes Intégrés (BDSI) Université de Perpignan Via Domitia (UPVD) 2005-01-01 https://doi.org/10.1029/2004JC002571 https://hal.archives-ouvertes.fr/hal-00124678/file/2004JC002571.pdf https://hal.archives-ouvertes.fr/hal-00124678 en eng HAL CCSD American Geophysical Union hal-00124678 BIBCODE: 2005JGRC.110.9S02L doi:10.1029/2004JC002571 10670/1.rl9iqq https://hal.archives-ouvertes.fr/hal-00124678/file/2004JC002571.pdf https://hal.archives-ouvertes.fr/hal-00124678 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research Journal of Geophysical Research, American Geophysical Union, 2005, 110, pp.C09S02. ⟨10.1029/2004JC002571⟩ envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2005 fttriple https://doi.org/10.1029/2004JC002571 2023-01-22T17:46:32Z The Southern Ocean is thought to play an important role in the context of global warming and anthropogenic emissions of CO 2 due to its high sensitivity to both climate change and changes in the carbon cycle. Assessing the penetration of anthropogenic CO 2 (C ant) into the Southern Ocean is therefore highly relevant to reduce the uncertainties attached to both the present knowledge of anthropogenic carbon inventories and predictions made by current ocean carbon models. This study compares different databased approaches for estimating the distribution of C ant in the ocean: a recently developed method based on the composite Tracer Combining Oxygen, Inorganic Carbon, and Total Alkalinity (TrOCA) and the ''historical'' back-calculation methods (the so-called DC* and preformed dissolved inorganic carbon methods). Note that the back-calculation technique requires special care when used in the Southern Ocean, where surface oxygen can significantly deviate from equilibrium with the atmosphere. All three methods were applied to data collected at the Indian-Atlantic boundary (WOCE line I6), where significant transient tracer concentrations were observed in deep and bottom waters. North of 50°S, distribution and inventories of C ant are coherent with previous data-based and model estimates, but we found larger storage of C ant south of 50°S as compared to the midlatitude region. In that, our results disagree with most previous estimates and suggest that the global inventory of anthropogenic CO 2 in the Southern Ocean could be much larger than what is currently believed. Article in Journal/Newspaper Southern Ocean Unknown Indian Southern Ocean Journal of Geophysical Research 110 C9 |