Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches
International audience The subtropical Indian Ocean along 32° S was for the first time simultaneously sampled in 2002 for inorganic carbon and transient tracers. The vertical distribution and inventory of anthropogenic carbon (C ANT ) from five different methods: four data-base methods (ΔC*, TrOCA,...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal.science/hal-01205910 https://hal.science/hal-01205910/document https://hal.science/hal-01205910/file/bg-6-681-2009.pdf https://doi.org/10.5194/bg-6-681-2009 |
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ftepunivpsaclay:oai:HAL:hal-01205910v1 |
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openpolar |
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Open Polar |
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École Polytechnique, Université Paris-Saclay: HAL |
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ftepunivpsaclay |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Álvarez, M. Lo Monaco, Claire Tanhua, Toste Yool, A. Oschlies, Andreas Bullister, John L. Goyet, Catherine Metzl, Nicolas Touratier, Franck Mcdonagh, E. Bryden, H. L. Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The subtropical Indian Ocean along 32° S was for the first time simultaneously sampled in 2002 for inorganic carbon and transient tracers. The vertical distribution and inventory of anthropogenic carbon (C ANT ) from five different methods: four data-base methods (ΔC*, TrOCA, TTD and IPSL) and a simulation from the OCCAM model are compared and discussed along with the observed CFC-12 and CCl 4 distributions. In the surface layer, where carbon-based methods are uncertain, TTD and OCCAM yield the same result (7±0.2 molC m−2), helping to specify the surface C ANT inventory. Below the mixed-layer, the comparison suggests that C ANT penetrates deeper and more uniformly into the Antarctic Intermediate Water layer limit than estimated from the much utilized ΔC* method. Significant CFC-12 and CCl 4 values are detected in bottom waters, associated with Antarctic Bottom Water. In this layer, except for ΔC* and OCCAM, the other methods detect significant C ANT values. Consequently, the lowest inventory is calculated using the ΔC* method (24±2 molC m−2) or OCCAM (24.4±2.8 molC m−2) while TrOCA, TTD, and IPSL lead to higher inventories (28.1±2.2, 28.9±2.3 and 30.8±2.5 molC m−2 respectively). Overall and despite the uncertainties each method is evaluated using its relationship with tracers and the knowledge about water masses in the subtropical Indian Ocean. Along 32° S our best estimate for the mean C ANT specific inventory is 28±2 molC m−2. Comparison exercises for data-based C ANT methods along with time-series or repeat sections analysis should help to identify strengths and caveats in the C ANT methods and to better constrain model simulations. |
author2 |
Institut Mediterrani d'Estudis Avancats (IMEDEA) Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands (UIB) 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) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) National Oceanography Centre Southampton (NOC) University of Southampton National Oceanic and Atmospheric Administration (NOAA) Institut de Modélisation et d'Analyses en géo-environnement et santé - Espace Développement (IMAGES-Espace DEV) UMR 228 Espace-Dev, Espace pour le développement Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Université de Guyane (UG)-Université des Antilles (UA)-Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Université de Guyane (UG)-Université des Antilles (UA) |
format |
Article in Journal/Newspaper |
author |
Álvarez, M. Lo Monaco, Claire Tanhua, Toste Yool, A. Oschlies, Andreas Bullister, John L. Goyet, Catherine Metzl, Nicolas Touratier, Franck Mcdonagh, E. Bryden, H. L. |
author_facet |
Álvarez, M. Lo Monaco, Claire Tanhua, Toste Yool, A. Oschlies, Andreas Bullister, John L. Goyet, Catherine Metzl, Nicolas Touratier, Franck Mcdonagh, E. Bryden, H. L. |
author_sort |
Álvarez, M. |
title |
Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
title_short |
Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
title_full |
Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
title_fullStr |
Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
title_full_unstemmed |
Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches |
title_sort |
estimating the storage of anthropogenic carbon in the subtropical indian ocean: a comparison of five different approaches |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-01205910 https://hal.science/hal-01205910/document https://hal.science/hal-01205910/file/bg-6-681-2009.pdf https://doi.org/10.5194/bg-6-681-2009 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01205910 Biogeosciences, 2009, 6 (4), pp.681-703. ⟨10.5194/bg-6-681-2009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-6-681-2009 hal-01205910 https://hal.science/hal-01205910 https://hal.science/hal-01205910/document https://hal.science/hal-01205910/file/bg-6-681-2009.pdf doi:10.5194/bg-6-681-2009 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-6-681-2009 |
container_title |
Biogeosciences |
container_volume |
6 |
container_issue |
4 |
container_start_page |
681 |
op_container_end_page |
703 |
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spelling |
ftepunivpsaclay:oai:HAL:hal-01205910v1 2024-05-19T07:29:28+00:00 Estimating the storage of anthropogenic carbon in the subtropical Indian Ocean: a comparison of five different approaches Álvarez, M. Lo Monaco, Claire Tanhua, Toste Yool, A. Oschlies, Andreas Bullister, John L. Goyet, Catherine Metzl, Nicolas Touratier, Franck Mcdonagh, E. Bryden, H. L. Institut Mediterrani d'Estudis Avancats (IMEDEA) Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands (UIB) 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) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) National Oceanography Centre Southampton (NOC) University of Southampton National Oceanic and Atmospheric Administration (NOAA) Institut de Modélisation et d'Analyses en géo-environnement et santé - Espace Développement (IMAGES-Espace DEV) UMR 228 Espace-Dev, Espace pour le développement Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Université de Guyane (UG)-Université des Antilles (UA)-Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Université de Guyane (UG)-Université des Antilles (UA) 2009 https://hal.science/hal-01205910 https://hal.science/hal-01205910/document https://hal.science/hal-01205910/file/bg-6-681-2009.pdf https://doi.org/10.5194/bg-6-681-2009 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-6-681-2009 hal-01205910 https://hal.science/hal-01205910 https://hal.science/hal-01205910/document https://hal.science/hal-01205910/file/bg-6-681-2009.pdf doi:10.5194/bg-6-681-2009 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01205910 Biogeosciences, 2009, 6 (4), pp.681-703. ⟨10.5194/bg-6-681-2009⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2009 ftepunivpsaclay https://doi.org/10.5194/bg-6-681-2009 2024-04-25T00:57:09Z International audience The subtropical Indian Ocean along 32° S was for the first time simultaneously sampled in 2002 for inorganic carbon and transient tracers. The vertical distribution and inventory of anthropogenic carbon (C ANT ) from five different methods: four data-base methods (ΔC*, TrOCA, TTD and IPSL) and a simulation from the OCCAM model are compared and discussed along with the observed CFC-12 and CCl 4 distributions. In the surface layer, where carbon-based methods are uncertain, TTD and OCCAM yield the same result (7±0.2 molC m−2), helping to specify the surface C ANT inventory. Below the mixed-layer, the comparison suggests that C ANT penetrates deeper and more uniformly into the Antarctic Intermediate Water layer limit than estimated from the much utilized ΔC* method. Significant CFC-12 and CCl 4 values are detected in bottom waters, associated with Antarctic Bottom Water. In this layer, except for ΔC* and OCCAM, the other methods detect significant C ANT values. Consequently, the lowest inventory is calculated using the ΔC* method (24±2 molC m−2) or OCCAM (24.4±2.8 molC m−2) while TrOCA, TTD, and IPSL lead to higher inventories (28.1±2.2, 28.9±2.3 and 30.8±2.5 molC m−2 respectively). Overall and despite the uncertainties each method is evaluated using its relationship with tracers and the knowledge about water masses in the subtropical Indian Ocean. Along 32° S our best estimate for the mean C ANT specific inventory is 28±2 molC m−2. Comparison exercises for data-based C ANT methods along with time-series or repeat sections analysis should help to identify strengths and caveats in the C ANT methods and to better constrain model simulations. Article in Journal/Newspaper Antarc* Antarctic École Polytechnique, Université Paris-Saclay: HAL Biogeosciences 6 4 681 703 |