Slope currents around the Kerguelen Islands from demersal longline fishing records
International audience The Kerguelen Plateau constitutes a natural obstacle for the eastward progress of the Antarctic Circumpolar Current, especially around the Kerguelen Islands. However, there is little quantitative knowledge of the current field around the islands due to lack of long-term curren...
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Online Access: | https://hal.archives-ouvertes.fr/hal-00440192 https://doi.org/10.1029/2008GL033660 |
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ftccsdartic:oai:HAL:hal-00440192v1 2023-05-15T13:44:35+02:00 Slope currents around the Kerguelen Islands from demersal longline fishing records Park, Y.-H. Gasco, N. Duhamel, Guy Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) Biologie des organismes marins et écosystèmes (BOME) Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN) 2008 https://hal.archives-ouvertes.fr/hal-00440192 https://doi.org/10.1029/2008GL033660 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033660 hal-00440192 https://hal.archives-ouvertes.fr/hal-00440192 doi:10.1029/2008GL033660 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00440192 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L09604. ⟨10.1029/2008GL033660⟩ slope currents longline fisheries Kerguelen [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2008GL033660 2020-12-26T09:34:24Z International audience The Kerguelen Plateau constitutes a natural obstacle for the eastward progress of the Antarctic Circumpolar Current, especially around the Kerguelen Islands. However, there is little quantitative knowledge of the current field around the islands due to lack of long-term current measurements. We performed a systematic analysis of a total of 28917 points of fishing gear drifts from setting and recovery positions of demersal longlines deployed between 2002 and 2007 for Patagonian Toothfish (Dissostichus eleginoides) fisheries in Kerguelen waters. This enabled the construction of a realistic field of depth-averaged time-mean slope currents along the 1000 m isobath all around the Kerguelen Islands. The strongest depth-mean velocities of 25 cm s−1 are associated with the Polar Front, which rounds the islands from the south and flows northward along the inner continental slope immediately east of the islands, strongly supporting previous hydrographic evidence. These results demonstrate the potential for hitherto unexploited historic longline drift data from demersal fishing grounds to provide valuable quantitative information on the regional circulation Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Patagonian Toothfish Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Kerguelen Kerguelen Islands The Antarctic Geophysical Research Letters 35 9 |
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 |
slope currents longline fisheries Kerguelen [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
slope currents longline fisheries Kerguelen [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology Park, Y.-H. Gasco, N. Duhamel, Guy Slope currents around the Kerguelen Islands from demersal longline fishing records |
topic_facet |
slope currents longline fisheries Kerguelen [SDV.EE]Life Sciences [q-bio]/Ecology environment [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The Kerguelen Plateau constitutes a natural obstacle for the eastward progress of the Antarctic Circumpolar Current, especially around the Kerguelen Islands. However, there is little quantitative knowledge of the current field around the islands due to lack of long-term current measurements. We performed a systematic analysis of a total of 28917 points of fishing gear drifts from setting and recovery positions of demersal longlines deployed between 2002 and 2007 for Patagonian Toothfish (Dissostichus eleginoides) fisheries in Kerguelen waters. This enabled the construction of a realistic field of depth-averaged time-mean slope currents along the 1000 m isobath all around the Kerguelen Islands. The strongest depth-mean velocities of 25 cm s−1 are associated with the Polar Front, which rounds the islands from the south and flows northward along the inner continental slope immediately east of the islands, strongly supporting previous hydrographic evidence. These results demonstrate the potential for hitherto unexploited historic longline drift data from demersal fishing grounds to provide valuable quantitative information on the regional circulation |
author2 |
Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) Biologie des organismes marins et écosystèmes (BOME) Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN) |
format |
Article in Journal/Newspaper |
author |
Park, Y.-H. Gasco, N. Duhamel, Guy |
author_facet |
Park, Y.-H. Gasco, N. Duhamel, Guy |
author_sort |
Park, Y.-H. |
title |
Slope currents around the Kerguelen Islands from demersal longline fishing records |
title_short |
Slope currents around the Kerguelen Islands from demersal longline fishing records |
title_full |
Slope currents around the Kerguelen Islands from demersal longline fishing records |
title_fullStr |
Slope currents around the Kerguelen Islands from demersal longline fishing records |
title_full_unstemmed |
Slope currents around the Kerguelen Islands from demersal longline fishing records |
title_sort |
slope currents around the kerguelen islands from demersal longline fishing records |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00440192 https://doi.org/10.1029/2008GL033660 |
geographic |
Antarctic Kerguelen Kerguelen Islands The Antarctic |
geographic_facet |
Antarctic Kerguelen Kerguelen Islands The Antarctic |
genre |
Antarc* Antarctic Kerguelen Islands Patagonian Toothfish |
genre_facet |
Antarc* Antarctic Kerguelen Islands Patagonian Toothfish |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00440192 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L09604. ⟨10.1029/2008GL033660⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033660 hal-00440192 https://hal.archives-ouvertes.fr/hal-00440192 doi:10.1029/2008GL033660 |
op_doi |
https://doi.org/10.1029/2008GL033660 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
9 |
_version_ |
1766203834851393536 |