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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ftird:oai:ird.fr:fdi:010063100 2023-05-15T13:55:14+02:00 Polar front around the Kerguelen Islands : an up-to-date determination and associated circulation of surface/subsurface waters Park, Y. H. Durand, I. Kestenare, Elodie Rougier, G. Zhou, M. d'Ovidio, F. Cotte, C. Lee, J. H. KERGUELEN ANTARCTIQUE 2014 http://www.documentation.ird.fr/hor/fdi:010063100 EN eng http://www.documentation.ird.fr/hor/fdi:010063100 oai:ird.fr:fdi:010063100 Park Y. H., Durand I., Kestenare Elodie, Rougier G., Zhou M., d'Ovidio F., Cotte C., Lee J. H. Polar front around the Kerguelen Islands : an up-to-date determination and associated circulation of surface/subsurface waters. Journal of Geophysical Research : Oceans, 2014, 119 (10), p. 6575-6592. Polar Front Kerguelen Southern Ocean text 2014 ftird 2020-08-21T06:53:12Z 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 degrees 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 degrees 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. Text Antarc* Antarctic Antarctique* Heard Island Kerguelen Islands Southern Ocean IRD (Institute de recherche pour le développement): Horizon Antarctic Southern Ocean The Antarctic Kerguelen Heard Island Kerguelen Islands |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
Polar Front Kerguelen Southern Ocean |
spellingShingle |
Polar Front Kerguelen Southern Ocean Park, Y. H. Durand, I. Kestenare, Elodie Rougier, G. Zhou, M. d'Ovidio, F. Cotte, C. Lee, J. H. 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 degrees 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 degrees 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 |
Text |
author |
Park, Y. H. Durand, I. Kestenare, Elodie Rougier, G. Zhou, M. d'Ovidio, F. Cotte, C. Lee, J. H. |
author_facet |
Park, Y. H. Durand, I. Kestenare, Elodie Rougier, G. Zhou, M. d'Ovidio, F. Cotte, C. Lee, J. H. |
author_sort |
Park, Y. H. |
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 |
publishDate |
2014 |
url |
http://www.documentation.ird.fr/hor/fdi:010063100 |
op_coverage |
KERGUELEN ANTARCTIQUE |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Heard Island Kerguelen Islands |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Heard Island Kerguelen Islands |
genre |
Antarc* Antarctic Antarctique* Heard Island Kerguelen Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctique* Heard Island Kerguelen Islands Southern Ocean |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010063100 oai:ird.fr:fdi:010063100 Park Y. H., Durand I., Kestenare Elodie, Rougier G., Zhou M., d'Ovidio F., Cotte C., Lee J. H. Polar front around the Kerguelen Islands : an up-to-date determination and associated circulation of surface/subsurface waters. Journal of Geophysical Research : Oceans, 2014, 119 (10), p. 6575-6592. |
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1766261522624937984 |