Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY
International audience We report on the hydrographic observations collected on the Antarctic continental shelf between 138°E and 146°E as part of the CEAMARC and ALBION projects in December 2007-January 2008. A total of 140 quasi-synoptic CTD (Conductivity-Temperature-Depth) casts were analysed to m...
Published in: | Polar Science |
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Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://hal.science/hal-00755147 https://doi.org/10.1016/J.POLAR.2011.04.008 |
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ftuniversailles:oai:HAL:hal-00755147v1 |
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openpolar |
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Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
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] |
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] Lacarra, Maïté Houssais, Marie-Noëlle Sultan, Emmanuelle Rintoul, S. R. Herbaut, Christophe Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
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] |
description |
International audience We report on the hydrographic observations collected on the Antarctic continental shelf between 138°E and 146°E as part of the CEAMARC and ALBION projects in December 2007-January 2008. A total of 140 quasi-synoptic CTD (Conductivity-Temperature-Depth) casts were analysed to map the spatial distribution of the summer hydrographic properties. Seven distinct hydrographic regimes were identified based on regional topographic features and the presence of specific water masses. These regimes are associated with spatial contrasts in the distribution of the High Salinity Shelf Water (HSSW) and the Modified Circumpolar Deep Water (MCDW). In particular, the HSSW distribution confirms the unique character of Commonwealth Bay in terms of extreme bottom salinity and dissolved oxygen values. The bay appears to be a preferred region for both dense shelf water formation and storage. The systematic survey of the Adélie Depression shows the ubiquitous presence of HSSW in the depression, and over the Adélie Sill as a 60 m thick layer at the centre of the sill. This water is dense enough to mix down the continental slope and form Antarctic Bottom Water. Upstream of the sill, the HSSW is shown to sit over the topography with indications of recirculation. The D'Urville Trough, another deep basin on the shelf, is filled with warmer and fresher water that is too light to contribute to the formation of AABW. The D'Urville Trough appears to collect MCDW which enters at the shelf break over the Adélie Bank and spreads over the northern slope of the trough. Another branch of MCDW enters in the eastern Adélie Sill and is found almost everywhere in the Adélie Depression with the noticeable exception of the coastal bays. Additional CTD casts collected during the ALBION-2009 experiment in January 2009 suggest that most of the features observed in 2008 in the Adélie Depression should be robust on a year-to-year basis although summer 2009 was characterized by fresher dense shelf waters. |
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 |
Lacarra, Maïté Houssais, Marie-Noëlle Sultan, Emmanuelle Rintoul, S. R. Herbaut, Christophe |
author_facet |
Lacarra, Maïté Houssais, Marie-Noëlle Sultan, Emmanuelle Rintoul, S. R. Herbaut, Christophe |
author_sort |
Lacarra, Maïté |
title |
Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
title_short |
Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
title_full |
Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
title_fullStr |
Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
title_full_unstemmed |
Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY |
title_sort |
summer hydrography on the shelf off terre adélie/george v land based on the albion and ceamarc observations during the ipy |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00755147 https://doi.org/10.1016/J.POLAR.2011.04.008 |
genre |
Antarc* Antarctic George V Land IPY Polar Science Polar Science |
genre_facet |
Antarc* Antarctic George V Land IPY Polar Science Polar Science |
op_source |
ISSN: 1873-9652 Polar Science https://hal.science/hal-00755147 Polar Science, 2011, 5, pp.88-103. ⟨10.1016/J.POLAR.2011.04.008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.POLAR.2011.04.008 hal-00755147 https://hal.science/hal-00755147 BIBCODE: 2011PolSc.5.88L doi:10.1016/J.POLAR.2011.04.008 |
op_doi |
https://doi.org/10.1016/J.POLAR.2011.04.008 |
container_title |
Polar Science |
container_volume |
5 |
container_issue |
2 |
container_start_page |
88 |
op_container_end_page |
103 |
_version_ |
1799470509786660864 |
spelling |
ftuniversailles:oai:HAL:hal-00755147v1 2024-05-19T07:32:28+00:00 Summer hydrography on the shelf off Terre Adélie/George V Land based on the ALBION and CEAMARC observations during the IPY Lacarra, Maïté Houssais, Marie-Noëlle Sultan, Emmanuelle Rintoul, S. R. Herbaut, Christophe 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) 2011-08 https://hal.science/hal-00755147 https://doi.org/10.1016/J.POLAR.2011.04.008 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.POLAR.2011.04.008 hal-00755147 https://hal.science/hal-00755147 BIBCODE: 2011PolSc.5.88L doi:10.1016/J.POLAR.2011.04.008 ISSN: 1873-9652 Polar Science https://hal.science/hal-00755147 Polar Science, 2011, 5, pp.88-103. ⟨10.1016/J.POLAR.2011.04.008⟩ [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] info:eu-repo/semantics/article Journal articles 2011 ftuniversailles https://doi.org/10.1016/J.POLAR.2011.04.008 2024-04-25T00:14:31Z International audience We report on the hydrographic observations collected on the Antarctic continental shelf between 138°E and 146°E as part of the CEAMARC and ALBION projects in December 2007-January 2008. A total of 140 quasi-synoptic CTD (Conductivity-Temperature-Depth) casts were analysed to map the spatial distribution of the summer hydrographic properties. Seven distinct hydrographic regimes were identified based on regional topographic features and the presence of specific water masses. These regimes are associated with spatial contrasts in the distribution of the High Salinity Shelf Water (HSSW) and the Modified Circumpolar Deep Water (MCDW). In particular, the HSSW distribution confirms the unique character of Commonwealth Bay in terms of extreme bottom salinity and dissolved oxygen values. The bay appears to be a preferred region for both dense shelf water formation and storage. The systematic survey of the Adélie Depression shows the ubiquitous presence of HSSW in the depression, and over the Adélie Sill as a 60 m thick layer at the centre of the sill. This water is dense enough to mix down the continental slope and form Antarctic Bottom Water. Upstream of the sill, the HSSW is shown to sit over the topography with indications of recirculation. The D'Urville Trough, another deep basin on the shelf, is filled with warmer and fresher water that is too light to contribute to the formation of AABW. The D'Urville Trough appears to collect MCDW which enters at the shelf break over the Adélie Bank and spreads over the northern slope of the trough. Another branch of MCDW enters in the eastern Adélie Sill and is found almost everywhere in the Adélie Depression with the noticeable exception of the coastal bays. Additional CTD casts collected during the ALBION-2009 experiment in January 2009 suggest that most of the features observed in 2008 in the Adélie Depression should be robust on a year-to-year basis although summer 2009 was characterized by fresher dense shelf waters. Article in Journal/Newspaper Antarc* Antarctic George V Land IPY Polar Science Polar Science Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Polar Science 5 2 88 103 |