Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E)
International audience We report on observations of dense shelf water overflows and Antarctic Bottom Water (AABW) formation along the continental margin of the Adélie and George V Land coast between 140°E and 149°E. Vertical sections and bottom layer water mass properties sampled during two RVIB Nat...
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
2010
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Online Access: | https://hal.science/hal-04113849 https://hal.science/hal-04113849/document https://hal.science/hal-04113849/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202010%20-%20Williams%20-%20Antarctic%20Bottom%20Water%20from%20the%20Ad%20lie%20and%20George%20V%20Land%20coast%20.pdf https://doi.org/10.1029/2009JC005812 |
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ftepunivpsaclay:oai:HAL:hal-04113849v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
Oceanography: General: Descriptive and regional oceanography Antarctic Bottom Water downslope flows Adélie and George V Land Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Oceanography: General: Descriptive and regional oceanography Antarctic Bottom Water downslope flows Adélie and George V Land Earth Science [SDU]Sciences of the Universe [physics] Williams, Guy Darvall Aoki, S. Jacobs, S. S. Rintoul, S. R. Tamura, T. Bindoff, N. L. Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
topic_facet |
Oceanography: General: Descriptive and regional oceanography Antarctic Bottom Water downslope flows Adélie and George V Land Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience We report on observations of dense shelf water overflows and Antarctic Bottom Water (AABW) formation along the continental margin of the Adélie and George V Land coast between 140°E and 149°E. Vertical sections and bottom layer water mass properties sampled during two RVIB Nathaniel B Palmer hydrographic surveys (NBP00-08, December 2000/January 2001 and NBP04-08, October 2004) describe the spreading of cold, dense shelf water on the continental slope and rise from two independent source regions. The primary source region is the Adélie Depression, exporting high-salinity dense shelf water through the Adélie Sill at 143°E. An additional eastern source region of lower-salinity dense shelf water from the Mertz Depression is identified for the first time from bottom layer properties northwest of the Mertz Sill and Mertz Bank (146°E-148°E) that extend as far as the Buffon Channel (144.75°E) in summer. Regional analysis of satellite-derived ice production estimates over the entire region from 1992 to 2005 suggests that up to 40% of the total ice production for the region occurs over the Mertz Depression and therefore this area is likely to make a significant contribution to the total dense shelf water export. Concurrent time series from bottom-mounted Microcats and ADCP instruments from the Mertz Polynya Experiment (April 1998 to May 1999) near the Adélie Sill and on the upper continental slope (1150 m) and lower continental rise (3250 m) to the north describe the seasonal variability in downslope events and their interaction with the ambient water masses. The critical density for shelf water to produce AABW is examined and found to be 27.85 kg m -3 from the Adélie Depression and as low as 27.80 kg m -3 from the Mertz Depression. This study suggests previous dense shelf water export estimates based on the flow through the Adélie Sill alone are conservative and that other regions around East Antarctica with similar ice production to the Mertz Depression could be contributing to the total AABW in ... |
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 |
Williams, Guy Darvall Aoki, S. Jacobs, S. S. Rintoul, S. R. Tamura, T. Bindoff, N. L. |
author_facet |
Williams, Guy Darvall Aoki, S. Jacobs, S. S. Rintoul, S. R. Tamura, T. Bindoff, N. L. |
author_sort |
Williams, Guy Darvall |
title |
Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
title_short |
Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
title_full |
Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
title_fullStr |
Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
title_full_unstemmed |
Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) |
title_sort |
antarctic bottom water from the adélie and george v land coast, east antarctica (140-149°e) |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-04113849 https://hal.science/hal-04113849/document https://hal.science/hal-04113849/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202010%20-%20Williams%20-%20Antarctic%20Bottom%20Water%20from%20the%20Ad%20lie%20and%20George%20V%20Land%20coast%20.pdf https://doi.org/10.1029/2009JC005812 |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-04113849 Journal of Geophysical Research. Oceans, 2010, 115, ⟨10.1029/2009JC005812⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JC005812 hal-04113849 https://hal.science/hal-04113849 https://hal.science/hal-04113849/document https://hal.science/hal-04113849/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202010%20-%20Williams%20-%20Antarctic%20Bottom%20Water%20from%20the%20Ad%20lie%20and%20George%20V%20Land%20coast%20.pdf BIBCODE: 2010JGRC.115.4027W doi:10.1029/2009JC005812 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2009JC005812 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
C4 |
_version_ |
1799483981005062144 |
spelling |
ftepunivpsaclay:oai:HAL:hal-04113849v1 2024-05-19T07:30:08+00:00 Antarctic Bottom Water from the Adélie and George V Land coast, East Antarctica (140-149°E) Williams, Guy Darvall Aoki, S. Jacobs, S. S. Rintoul, S. R. Tamura, T. Bindoff, N. L. 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 https://hal.science/hal-04113849 https://hal.science/hal-04113849/document https://hal.science/hal-04113849/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202010%20-%20Williams%20-%20Antarctic%20Bottom%20Water%20from%20the%20Ad%20lie%20and%20George%20V%20Land%20coast%20.pdf https://doi.org/10.1029/2009JC005812 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2009JC005812 hal-04113849 https://hal.science/hal-04113849 https://hal.science/hal-04113849/document https://hal.science/hal-04113849/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202010%20-%20Williams%20-%20Antarctic%20Bottom%20Water%20from%20the%20Ad%20lie%20and%20George%20V%20Land%20coast%20.pdf BIBCODE: 2010JGRC.115.4027W doi:10.1029/2009JC005812 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-04113849 Journal of Geophysical Research. Oceans, 2010, 115, ⟨10.1029/2009JC005812⟩ Oceanography: General: Descriptive and regional oceanography Antarctic Bottom Water downslope flows Adélie and George V Land Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2010 ftepunivpsaclay https://doi.org/10.1029/2009JC005812 2024-04-25T00:35:14Z International audience We report on observations of dense shelf water overflows and Antarctic Bottom Water (AABW) formation along the continental margin of the Adélie and George V Land coast between 140°E and 149°E. Vertical sections and bottom layer water mass properties sampled during two RVIB Nathaniel B Palmer hydrographic surveys (NBP00-08, December 2000/January 2001 and NBP04-08, October 2004) describe the spreading of cold, dense shelf water on the continental slope and rise from two independent source regions. The primary source region is the Adélie Depression, exporting high-salinity dense shelf water through the Adélie Sill at 143°E. An additional eastern source region of lower-salinity dense shelf water from the Mertz Depression is identified for the first time from bottom layer properties northwest of the Mertz Sill and Mertz Bank (146°E-148°E) that extend as far as the Buffon Channel (144.75°E) in summer. Regional analysis of satellite-derived ice production estimates over the entire region from 1992 to 2005 suggests that up to 40% of the total ice production for the region occurs over the Mertz Depression and therefore this area is likely to make a significant contribution to the total dense shelf water export. Concurrent time series from bottom-mounted Microcats and ADCP instruments from the Mertz Polynya Experiment (April 1998 to May 1999) near the Adélie Sill and on the upper continental slope (1150 m) and lower continental rise (3250 m) to the north describe the seasonal variability in downslope events and their interaction with the ambient water masses. The critical density for shelf water to produce AABW is examined and found to be 27.85 kg m -3 from the Adélie Depression and as low as 27.80 kg m -3 from the Mertz Depression. This study suggests previous dense shelf water export estimates based on the flow through the Adélie Sill alone are conservative and that other regions around East Antarctica with similar ice production to the Mertz Depression could be contributing to the total AABW in ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica George V Land École Polytechnique, Université Paris-Saclay: HAL Journal of Geophysical Research 115 C4 |