On the Cascading of Dense Shelf Waters in the Irminger Sea
International audience Hydrographic data collected in the Irminger Sea in the 1990s-2000s indicate that dense shelf waters carried by the East Greenland Current south of the Denmark Strait intermittently descend (cascade) down the continental slope and merge with the deep waters originating from the...
Published in: | Journal of Physical Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00783515 https://doi.org/10.1175/JPO-D-12-012.1 |
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ftccsdartic:oai:HAL:hal-00783515v1 2023-05-15T15:51:49+02:00 On the Cascading of Dense Shelf Waters in the Irminger Sea Falina, A. Sarafanov, A. Mercier, H. Lherminier, P. Sokov, A. Daniault, Nathalie P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.archives-ouvertes.fr/hal-00783515 https://doi.org/10.1175/JPO-D-12-012.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-12-012.1 hal-00783515 https://hal.archives-ouvertes.fr/hal-00783515 doi:10.1175/JPO-D-12-012.1 ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.archives-ouvertes.fr/hal-00783515 Journal of Physical Oceanography, American Meteorological Society, 2012, 42 (12), pp.2254-2267. ⟨10.1175/JPO-D-12-012.1⟩ Ocean circulation Upwelling/downwelling Bottom currents/bottom water Boundary currents Thermohaline circulation Water masses [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.1175/JPO-D-12-012.1 2021-10-17T01:42:40Z International audience Hydrographic data collected in the Irminger Sea in the 1990s-2000s indicate that dense shelf waters carried by the East Greenland Current south of the Denmark Strait intermittently descend (cascade) down the continental slope and merge with the deep waters originating from the Nordic Seas overflows. Repeat measurements on the East Greenland shelf at ~200 km south of the Denmark Strait (65°-66°N) reveal that East Greenland shelf waters in the Irminger Sea are occasionally as dense (σ0 > 27.80) as the overflow-derived deep waters carried by the Deep Western Boundary Current (DWBC). Clear hydrographic traces of upstream cascading of dense shelf waters are found over the continental slope at 64.3°N, where the densest plumes (σ0 > 27.80) originating from the shelf are identified as distinct low-salinity anomalies in the DWBC. Downstream observations suggest that dense fresh waters descending from the shelf in the northern Irminger Sea can be distinguished in the DWBC up to the latitude of Cape Farewell (~60°N) and that these waters make a significant contribution to the DWBC transport. Article in Journal/Newspaper Cape Farewell Denmark Strait East Greenland east greenland current Greenland Nordic Seas Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Journal of Physical Oceanography 42 12 2254 2267 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Ocean circulation Upwelling/downwelling Bottom currents/bottom water Boundary currents Thermohaline circulation Water masses [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Ocean circulation Upwelling/downwelling Bottom currents/bottom water Boundary currents Thermohaline circulation Water masses [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Falina, A. Sarafanov, A. Mercier, H. Lherminier, P. Sokov, A. Daniault, Nathalie On the Cascading of Dense Shelf Waters in the Irminger Sea |
topic_facet |
Ocean circulation Upwelling/downwelling Bottom currents/bottom water Boundary currents Thermohaline circulation Water masses [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Hydrographic data collected in the Irminger Sea in the 1990s-2000s indicate that dense shelf waters carried by the East Greenland Current south of the Denmark Strait intermittently descend (cascade) down the continental slope and merge with the deep waters originating from the Nordic Seas overflows. Repeat measurements on the East Greenland shelf at ~200 km south of the Denmark Strait (65°-66°N) reveal that East Greenland shelf waters in the Irminger Sea are occasionally as dense (σ0 > 27.80) as the overflow-derived deep waters carried by the Deep Western Boundary Current (DWBC). Clear hydrographic traces of upstream cascading of dense shelf waters are found over the continental slope at 64.3°N, where the densest plumes (σ0 > 27.80) originating from the shelf are identified as distinct low-salinity anomalies in the DWBC. Downstream observations suggest that dense fresh waters descending from the shelf in the northern Irminger Sea can be distinguished in the DWBC up to the latitude of Cape Farewell (~60°N) and that these waters make a significant contribution to the DWBC transport. |
author2 |
P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Falina, A. Sarafanov, A. Mercier, H. Lherminier, P. Sokov, A. Daniault, Nathalie |
author_facet |
Falina, A. Sarafanov, A. Mercier, H. Lherminier, P. Sokov, A. Daniault, Nathalie |
author_sort |
Falina, A. |
title |
On the Cascading of Dense Shelf Waters in the Irminger Sea |
title_short |
On the Cascading of Dense Shelf Waters in the Irminger Sea |
title_full |
On the Cascading of Dense Shelf Waters in the Irminger Sea |
title_fullStr |
On the Cascading of Dense Shelf Waters in the Irminger Sea |
title_full_unstemmed |
On the Cascading of Dense Shelf Waters in the Irminger Sea |
title_sort |
on the cascading of dense shelf waters in the irminger sea |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00783515 https://doi.org/10.1175/JPO-D-12-012.1 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea |
geographic_facet |
Greenland Irminger Sea |
genre |
Cape Farewell Denmark Strait East Greenland east greenland current Greenland Nordic Seas |
genre_facet |
Cape Farewell Denmark Strait East Greenland east greenland current Greenland Nordic Seas |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.archives-ouvertes.fr/hal-00783515 Journal of Physical Oceanography, American Meteorological Society, 2012, 42 (12), pp.2254-2267. ⟨10.1175/JPO-D-12-012.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-12-012.1 hal-00783515 https://hal.archives-ouvertes.fr/hal-00783515 doi:10.1175/JPO-D-12-012.1 |
op_doi |
https://doi.org/10.1175/JPO-D-12-012.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
42 |
container_issue |
12 |
container_start_page |
2254 |
op_container_end_page |
2267 |
_version_ |
1766387207373848576 |