Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S]
International audience This paper describes for the first time the summer and winter distributions of sea surface δ 13 C DIC in the Southern Indian Ocean (20°S-60°S). For this we used δ 13 C DIC measurements from 10 cruises conducted between 1998 and 2005. For summer and winter, the highest δ 13 C D...
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ftceafr:oai:HAL:hal-00759242v1 2024-05-19T07:31:12+00:00 Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] Racapé, Virginie Lo Monaco, Claire Metzl, Nicolas Pierre, Catherine 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) 2010-11 https://hal.science/hal-00759242 https://doi.org/10.1111/J.1600-0889.2010.00504.X en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1111/J.1600-0889.2010.00504.X hal-00759242 https://hal.science/hal-00759242 BIBCODE: 2010TellB.62.660R doi:10.1111/J.1600-0889.2010.00504.X ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal.science/hal-00759242 Tellus B - Chemical and Physical Meteorology, 2010, 62, pp.660-673. ⟨10.1111/J.1600-0889.2010.00504.X⟩ [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 2010 ftceafr https://doi.org/10.1111/J.1600-0889.2010.00504.X 2024-04-25T01:16:08Z International audience This paper describes for the first time the summer and winter distributions of sea surface δ 13 C DIC in the Southern Indian Ocean (20°S-60°S). For this we used δ 13 C DIC measurements from 10 cruises conducted between 1998 and 2005. For summer and winter, the highest δ 13 C DIC values (>2‰) are observed in sub-Antarctic waters (40°S-50°S) and attributed mainly to biological activity, enhanced in the vicinity of Crozet and Kerguelen Archipelagoes. The lowest δ 13 C DIC values are found in subtropical waters (25°S-35°S), with a minimum (<1‰) in the Agulhas Current region and in the Mozambique channel. On the seasonal scale, δ 13 C DIC is higher during summer than during winter in all regions. The largest seasonal amplitude of variation (~0.3‰), observed in the region 35°S-40°S, is attributed to biological activity during summer and to deep vertical mixing during winter. In subtropical oligotrophic waters, the mean seasonal amplitude of variation (~0.15‰) is mainly explained by air-sea CO 2 fluxes. On the interannual scale, we also identified a large negative anomaly of δ 13 C DIC in the subtropical waters during austral summer 2002, associated to an anomalous ocean CO 2 sink due to cold conditions during this period. Article in Journal/Newspaper Antarc* Antarctic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Tellus B: Chemical and Physical Meteorology 62 5 660 673 |
institution |
Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
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 Racapé, Virginie Lo Monaco, Claire Metzl, Nicolas Pierre, Catherine Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
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 |
International audience This paper describes for the first time the summer and winter distributions of sea surface δ 13 C DIC in the Southern Indian Ocean (20°S-60°S). For this we used δ 13 C DIC measurements from 10 cruises conducted between 1998 and 2005. For summer and winter, the highest δ 13 C DIC values (>2‰) are observed in sub-Antarctic waters (40°S-50°S) and attributed mainly to biological activity, enhanced in the vicinity of Crozet and Kerguelen Archipelagoes. The lowest δ 13 C DIC values are found in subtropical waters (25°S-35°S), with a minimum (<1‰) in the Agulhas Current region and in the Mozambique channel. On the seasonal scale, δ 13 C DIC is higher during summer than during winter in all regions. The largest seasonal amplitude of variation (~0.3‰), observed in the region 35°S-40°S, is attributed to biological activity during summer and to deep vertical mixing during winter. In subtropical oligotrophic waters, the mean seasonal amplitude of variation (~0.15‰) is mainly explained by air-sea CO 2 fluxes. On the interannual scale, we also identified a large negative anomaly of δ 13 C DIC in the subtropical waters during austral summer 2002, associated to an anomalous ocean CO 2 sink due to cold conditions during this period. |
author2 |
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 |
Racapé, Virginie Lo Monaco, Claire Metzl, Nicolas Pierre, Catherine |
author_facet |
Racapé, Virginie Lo Monaco, Claire Metzl, Nicolas Pierre, Catherine |
author_sort |
Racapé, Virginie |
title |
Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
title_short |
Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
title_full |
Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
title_fullStr |
Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
title_full_unstemmed |
Summer and winter distribution of δ 13 C DIC in surface waters of the South Indian Ocean [20°S-60°S] |
title_sort |
summer and winter distribution of δ 13 c dic in surface waters of the south indian ocean [20°s-60°s] |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00759242 https://doi.org/10.1111/J.1600-0889.2010.00504.X |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal.science/hal-00759242 Tellus B - Chemical and Physical Meteorology, 2010, 62, pp.660-673. ⟨10.1111/J.1600-0889.2010.00504.X⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/J.1600-0889.2010.00504.X hal-00759242 https://hal.science/hal-00759242 BIBCODE: 2010TellB.62.660R doi:10.1111/J.1600-0889.2010.00504.X |
op_doi |
https://doi.org/10.1111/J.1600-0889.2010.00504.X |
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Tellus B: Chemical and Physical Meteorology |
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62 |
container_issue |
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