Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters
The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing...
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Online Access: | https://archimer.ifremer.fr/doc/00244/35485/33995.pdf https://doi.org/10.1002/2014JC010061 https://archimer.ifremer.fr/doc/00244/35485/ |
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ftarchimer:oai:archimer.ifremer.fr:35485 2023-05-15T13:50:50+02:00 Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters Park, Young-hyang Durand, Isabelle Kestenare, Elodie Rougier, Gilles Zhou, Meng D'Ovidio, Francesco Cotte, Cedric Lee, Jae-hak 2014-10-02 application/pdf https://archimer.ifremer.fr/doc/00244/35485/33995.pdf https://doi.org/10.1002/2014JC010061 https://archimer.ifremer.fr/doc/00244/35485/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00244/35485/33995.pdf doi:10.1002/2014JC010061 https://archimer.ifremer.fr/doc/00244/35485/ 2014. The Authors. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (0148-0027) (Amer Geophysical Union), 2014-10-02 , Vol. 119 , N. 10 , P. 6575-6592 Polar Front Kerguelen Southern Ocean text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1002/2014JC010061 2021-09-23T20:25:36Z The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing confusion about the Polar Front (PF) in the Kerguelen region due to diverse suggestions in the literature for its geographical location with an extreme difference over 10° of latitude. Based on abundant historical hydrographic data, the in situ hydrographic and current measurements during the 2011 KEOPS2 cruise, satellite chlorophyll images, and altimetry-derived surface velocity fields, we determine and validate an up-to-date location of the PF around the Kerguelen Islands. Artificial Lagrangian particle trajectories computed from altimetric velocity time series are analyzed for the possible pathways and sources of different surface/subsurface waters advected into the chlorophyll bloom area east off the islands studied during the KEOPS2 cruise. The PF location determined as the northernmost boundary of the Winter Water colder than 2°C, which is also associated with a band of strong currents, appears to be primarily controlled by topography. The PF rounds the Kerguelen Islands from the south to deflect northward along the eastern escarpment up to the northeastern corner of the Kerguelen Plateau before making its southward retroflection. It is shown that the major surface/subsurface waters found within the deep basin east of the Kerguelen Islands originate from the shelf around the Heard Island, rather than from the shallow shelf north of the Kerguelen Islands. Article in Journal/Newspaper Antarc* Antarctic Heard Island Kerguelen Islands Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Heard Island Kerguelen Kerguelen Islands Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 119 10 6575 6592 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Polar Front Kerguelen Southern Ocean |
spellingShingle |
Polar Front Kerguelen Southern Ocean Park, Young-hyang Durand, Isabelle Kestenare, Elodie Rougier, Gilles Zhou, Meng D'Ovidio, Francesco Cotte, Cedric Lee, Jae-hak Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
topic_facet |
Polar Front Kerguelen Southern Ocean |
description |
The circulation of iron-rich shelf waters around the Kerguelen Islands plays a crucial role for a climatically important, annually recurrent phytoplankton spring bloom over the sluggish shelf region and its downstream plume area along the Antarctic circumpolar flow. However, there is a long-standing confusion about the Polar Front (PF) in the Kerguelen region due to diverse suggestions in the literature for its geographical location with an extreme difference over 10° of latitude. Based on abundant historical hydrographic data, the in situ hydrographic and current measurements during the 2011 KEOPS2 cruise, satellite chlorophyll images, and altimetry-derived surface velocity fields, we determine and validate an up-to-date location of the PF around the Kerguelen Islands. Artificial Lagrangian particle trajectories computed from altimetric velocity time series are analyzed for the possible pathways and sources of different surface/subsurface waters advected into the chlorophyll bloom area east off the islands studied during the KEOPS2 cruise. The PF location determined as the northernmost boundary of the Winter Water colder than 2°C, which is also associated with a band of strong currents, appears to be primarily controlled by topography. The PF rounds the Kerguelen Islands from the south to deflect northward along the eastern escarpment up to the northeastern corner of the Kerguelen Plateau before making its southward retroflection. It is shown that the major surface/subsurface waters found within the deep basin east of the Kerguelen Islands originate from the shelf around the Heard Island, rather than from the shallow shelf north of the Kerguelen Islands. |
format |
Article in Journal/Newspaper |
author |
Park, Young-hyang Durand, Isabelle Kestenare, Elodie Rougier, Gilles Zhou, Meng D'Ovidio, Francesco Cotte, Cedric Lee, Jae-hak |
author_facet |
Park, Young-hyang Durand, Isabelle Kestenare, Elodie Rougier, Gilles Zhou, Meng D'Ovidio, Francesco Cotte, Cedric Lee, Jae-hak |
author_sort |
Park, Young-hyang |
title |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
title_short |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
title_full |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
title_fullStr |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
title_full_unstemmed |
Polar Front around the Kerguelen Islands: An up-to-date determination and associated circulation of surface/subsurface waters |
title_sort |
polar front around the kerguelen islands: an up-to-date determination and associated circulation of surface/subsurface waters |
publisher |
Amer Geophysical Union |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00244/35485/33995.pdf https://doi.org/10.1002/2014JC010061 https://archimer.ifremer.fr/doc/00244/35485/ |
geographic |
Antarctic Heard Island Kerguelen Kerguelen Islands Southern Ocean The Antarctic |
geographic_facet |
Antarctic Heard Island Kerguelen Kerguelen Islands Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Heard Island Kerguelen Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Heard Island Kerguelen Islands Southern Ocean |
op_source |
Journal Of Geophysical Research-oceans (0148-0027) (Amer Geophysical Union), 2014-10-02 , Vol. 119 , N. 10 , P. 6575-6592 |
op_relation |
https://archimer.ifremer.fr/doc/00244/35485/33995.pdf doi:10.1002/2014JC010061 https://archimer.ifremer.fr/doc/00244/35485/ |
op_rights |
2014. The Authors. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2014JC010061 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
10 |
container_start_page |
6575 |
op_container_end_page |
6592 |
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1766254133777530880 |