Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise
PAR00002959 International audience This study presents oceanic distributions of stable isotopes (δ 18 O of water and δ 13 C of ΣCO 2 ) and CFC-12 from samples collected during the CIVA1 cruise (February/March 1993), across the Southern Ocean, along a meridian section at 30°E, from South Africa (44°S...
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Format: | Article in Journal/Newspaper |
Language: | English |
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1998
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ftunivnantes:oai:HAL:ird-00145342v1 2023-05-15T13:53:56+02:00 Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise Archambeau, Anne-Sophie Pierre, Catherine Poisson, Alain Schauer, Bernard Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) WOCE CIVA 1998 https://hal.ird.fr/ird-00145342 https://hal.ird.fr/ird-00145342/document https://hal.ird.fr/ird-00145342/file/asa_JMS.pdf https://doi.org/10.1016/S0924-7963(98)00027-X en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S0924-7963(98)00027-X ird-00145342 https://hal.ird.fr/ird-00145342 https://hal.ird.fr/ird-00145342/document https://hal.ird.fr/ird-00145342/file/asa_JMS.pdf doi:10.1016/S0924-7963(98)00027-X info:eu-repo/semantics/OpenAccess ISSN: 0924-7963 Journal of Marine Systems https://hal.ird.fr/ird-00145342 Journal of Marine Systems, 1998, 17 (1-4), pp.25-38. ⟨10.1016/S0924-7963(98)00027-X⟩ Stable isotopes 18 O 13 C CFC-12 Austral Ocean [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1998 ftunivnantes https://doi.org/10.1016/S0924-7963(98)00027-X 2023-02-08T09:47:05Z PAR00002959 International audience This study presents oceanic distributions of stable isotopes (δ 18 O of water and δ 13 C of ΣCO 2 ) and CFC-12 from samples collected during the CIVA1 cruise (February/March 1993), across the Southern Ocean, along a meridian section at 30°E, from South Africa (44°S) to Antarctica (70°S). The isotopic measurements show important variations between the subantarctic surface waters with low δ 18 O–high δ 13 C values and the antarctic surface waters with very low δ 18 O–low δ 13 C values. The surface distributions of δ 13 C values follow the major frontal oceanic structures; the vertical distribution shows the progressive upwelling from the subantarctic zone to the antarctic divergence of 13 C-depleted CO 2 derived from remineralization of organic matter. Along the Antarctic continental shelf, between 2500 and 4000 m, a core of water with δ 18 O values close to −0.1‰ is associated with a relative maximum in CFC-12 concentration, although this core is not detected by its temperature and salinity parameters. This water mass, which corresponds to recently formed deep water, may originate from the eastward extension of the Weddell gyre or from bottom waters coming from the East and formed near Prydz Bay. Article in Journal/Newspaper Antarc* Antarctic Antarctica Austral Ocean Prydz Bay Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Prydz Bay Southern Ocean The Antarctic Weddell Journal of Marine Systems 17 1-4 25 38 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Stable isotopes 18 O 13 C CFC-12 Austral Ocean [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Stable isotopes 18 O 13 C CFC-12 Austral Ocean [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Archambeau, Anne-Sophie Pierre, Catherine Poisson, Alain Schauer, Bernard Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
topic_facet |
Stable isotopes 18 O 13 C CFC-12 Austral Ocean [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
PAR00002959 International audience This study presents oceanic distributions of stable isotopes (δ 18 O of water and δ 13 C of ΣCO 2 ) and CFC-12 from samples collected during the CIVA1 cruise (February/March 1993), across the Southern Ocean, along a meridian section at 30°E, from South Africa (44°S) to Antarctica (70°S). The isotopic measurements show important variations between the subantarctic surface waters with low δ 18 O–high δ 13 C values and the antarctic surface waters with very low δ 18 O–low δ 13 C values. The surface distributions of δ 13 C values follow the major frontal oceanic structures; the vertical distribution shows the progressive upwelling from the subantarctic zone to the antarctic divergence of 13 C-depleted CO 2 derived from remineralization of organic matter. Along the Antarctic continental shelf, between 2500 and 4000 m, a core of water with δ 18 O values close to −0.1‰ is associated with a relative maximum in CFC-12 concentration, although this core is not detected by its temperature and salinity parameters. This water mass, which corresponds to recently formed deep water, may originate from the eastward extension of the Weddell gyre or from bottom waters coming from the East and formed near Prydz Bay. |
author2 |
Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) WOCE CIVA |
format |
Article in Journal/Newspaper |
author |
Archambeau, Anne-Sophie Pierre, Catherine Poisson, Alain Schauer, Bernard |
author_facet |
Archambeau, Anne-Sophie Pierre, Catherine Poisson, Alain Schauer, Bernard |
author_sort |
Archambeau, Anne-Sophie |
title |
Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
title_short |
Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
title_full |
Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
title_fullStr |
Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
title_full_unstemmed |
Distributions of oxygen and carbon stable isotopes and CFC-12 in the water masses of the Southern Ocean at 30°E from South Africa to Antarctica: results of the CIVA1 cruise |
title_sort |
distributions of oxygen and carbon stable isotopes and cfc-12 in the water masses of the southern ocean at 30°e from south africa to antarctica: results of the civa1 cruise |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.ird.fr/ird-00145342 https://hal.ird.fr/ird-00145342/document https://hal.ird.fr/ird-00145342/file/asa_JMS.pdf https://doi.org/10.1016/S0924-7963(98)00027-X |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) |
geographic |
Antarctic Austral Austral Ocean Prydz Bay Southern Ocean The Antarctic Weddell |
geographic_facet |
Antarctic Austral Austral Ocean Prydz Bay Southern Ocean The Antarctic Weddell |
genre |
Antarc* Antarctic Antarctica Austral Ocean Prydz Bay Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Austral Ocean Prydz Bay Southern Ocean |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal.ird.fr/ird-00145342 Journal of Marine Systems, 1998, 17 (1-4), pp.25-38. ⟨10.1016/S0924-7963(98)00027-X⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0924-7963(98)00027-X ird-00145342 https://hal.ird.fr/ird-00145342 https://hal.ird.fr/ird-00145342/document https://hal.ird.fr/ird-00145342/file/asa_JMS.pdf doi:10.1016/S0924-7963(98)00027-X |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/S0924-7963(98)00027-X |
container_title |
Journal of Marine Systems |
container_volume |
17 |
container_issue |
1-4 |
container_start_page |
25 |
op_container_end_page |
38 |
_version_ |
1766259413696380928 |