ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN
International audience Particulate Ba profiles were measured in the Indian sector of the southern ocean. The largest fraction (>80%) of this barium is present as barite microcrystals. The profiles of total barium are characterized by a subsurface maximum between 200 and 500 m depth in the vicinit...
Published in: | Global Biogeochemical Cycles |
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Online Access: | https://hal.science/hal-03561342 https://hal.science/hal-03561342/document https://hal.science/hal-03561342/file/Global%20Biogeochemical%20Cycles%20-%20March%201990%20-%20Dehairs%20-%20On%20suspended%20barite%20and%20the%20oxygen%20minimum%20in%20the%20Southern%20Ocean.pdf https://doi.org/10.1029/GB004i001p00085 |
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ftsorbonneuniv:oai:HAL:hal-03561342v1 2024-09-15T17:40:47+00:00 ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN Dehairs, Frank Goeyens, L. Stroobants, N. Bernard, P. Goyet, Catherine Poisson, Alain Chesselet, R. Vrije Universiteit Brussel Bruxelles (VUB) UNIVERSITY OF ANTWERP WILRIJK BEL Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre des Faibles Radioactivités (CFR) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) 1990-03 https://hal.science/hal-03561342 https://hal.science/hal-03561342/document https://hal.science/hal-03561342/file/Global%20Biogeochemical%20Cycles%20-%20March%201990%20-%20Dehairs%20-%20On%20suspended%20barite%20and%20the%20oxygen%20minimum%20in%20the%20Southern%20Ocean.pdf https://doi.org/10.1029/GB004i001p00085 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/GB004i001p00085 hal-03561342 https://hal.science/hal-03561342 https://hal.science/hal-03561342/document https://hal.science/hal-03561342/file/Global%20Biogeochemical%20Cycles%20-%20March%201990%20-%20Dehairs%20-%20On%20suspended%20barite%20and%20the%20oxygen%20minimum%20in%20the%20Southern%20Ocean.pdf doi:10.1029/GB004i001p00085 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03561342 Global Biogeochemical Cycles, 1990, 4 (1), pp.85-102. ⟨10.1029/GB004i001p00085⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 1990 ftsorbonneuniv https://doi.org/10.1029/GB004i001p00085 2024-08-22T23:45:09Z International audience Particulate Ba profiles were measured in the Indian sector of the southern ocean. The largest fraction (>80%) of this barium is present as barite microcrystals. The profiles of total barium are characterized by a subsurface maximum between 200 and 500 m depth in the vicinity of the oxygen minimum. Highest barira values are found just south of the Polar Front, while lowest values occur close to the Antarctic Divergence. Between the divergence and the Polar Front a fight inverse relationship is observed between oxygen in the oxygen minimum and barium in the barium maximum. This relationship disappears north of the Polar Front. Since suspended barite is known to be of biological origin, the correlation of barite with oxygen suggests that the observed decrease of oxygen in the oxygen minimum, between the divergence and the Polar Front is due to local consumption of oxygen. It is proposed that deep low oxygen water is advected towards the Divergence where upwelling occurs and where this water subsequently partly spreads out to the north, northeast , as entrained by the Antarctic Circumpolar Current. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean HAL Sorbonne Université Global Biogeochemical Cycles 4 1 85 102 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Dehairs, Frank Goeyens, L. Stroobants, N. Bernard, P. Goyet, Catherine Poisson, Alain Chesselet, R. ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Particulate Ba profiles were measured in the Indian sector of the southern ocean. The largest fraction (>80%) of this barium is present as barite microcrystals. The profiles of total barium are characterized by a subsurface maximum between 200 and 500 m depth in the vicinity of the oxygen minimum. Highest barira values are found just south of the Polar Front, while lowest values occur close to the Antarctic Divergence. Between the divergence and the Polar Front a fight inverse relationship is observed between oxygen in the oxygen minimum and barium in the barium maximum. This relationship disappears north of the Polar Front. Since suspended barite is known to be of biological origin, the correlation of barite with oxygen suggests that the observed decrease of oxygen in the oxygen minimum, between the divergence and the Polar Front is due to local consumption of oxygen. It is proposed that deep low oxygen water is advected towards the Divergence where upwelling occurs and where this water subsequently partly spreads out to the north, northeast , as entrained by the Antarctic Circumpolar Current. |
author2 |
Vrije Universiteit Brussel Bruxelles (VUB) UNIVERSITY OF ANTWERP WILRIJK BEL Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Centre des Faibles Radioactivités (CFR) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Dehairs, Frank Goeyens, L. Stroobants, N. Bernard, P. Goyet, Catherine Poisson, Alain Chesselet, R. |
author_facet |
Dehairs, Frank Goeyens, L. Stroobants, N. Bernard, P. Goyet, Catherine Poisson, Alain Chesselet, R. |
author_sort |
Dehairs, Frank |
title |
ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
title_short |
ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
title_full |
ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
title_fullStr |
ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
title_full_unstemmed |
ON SUSPENDED BARITE AND TIlE OXYGEN MINIMUM IN THE SOUTHERN OCEAN |
title_sort |
on suspended barite and tile oxygen minimum in the southern ocean |
publisher |
HAL CCSD |
publishDate |
1990 |
url |
https://hal.science/hal-03561342 https://hal.science/hal-03561342/document https://hal.science/hal-03561342/file/Global%20Biogeochemical%20Cycles%20-%20March%201990%20-%20Dehairs%20-%20On%20suspended%20barite%20and%20the%20oxygen%20minimum%20in%20the%20Southern%20Ocean.pdf https://doi.org/10.1029/GB004i001p00085 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03561342 Global Biogeochemical Cycles, 1990, 4 (1), pp.85-102. ⟨10.1029/GB004i001p00085⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/GB004i001p00085 hal-03561342 https://hal.science/hal-03561342 https://hal.science/hal-03561342/document https://hal.science/hal-03561342/file/Global%20Biogeochemical%20Cycles%20-%20March%201990%20-%20Dehairs%20-%20On%20suspended%20barite%20and%20the%20oxygen%20minimum%20in%20the%20Southern%20Ocean.pdf doi:10.1029/GB004i001p00085 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/GB004i001p00085 |
container_title |
Global Biogeochemical Cycles |
container_volume |
4 |
container_issue |
1 |
container_start_page |
85 |
op_container_end_page |
102 |
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1810486828935938048 |