Seasonal meandering of the polar front upstream of the Kerguelen Plateau
The location of the Antarctic Polar Front (PF) is mapped in the Southern Indian Ocean by decomposing the shape of temperature and salinity profiles into vertical modes using a functional Principal Component Analysis. We define the PF as the northernmost minimum of temperature at the subsurface and r...
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2018
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Online Access: | https://researchers.mq.edu.au/en/publications/12203c58-1238-4fd8-bb0b-a829e9c94405 https://doi.org/10.1029/2018GL079614 https://research-management.mq.edu.au/ws/files/94039420/93573711.pdf http://www.scopus.com/inward/record.url?scp=85053842433&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/12203c58-1238-4fd8-bb0b-a829e9c94405 2024-09-15T17:41:31+00:00 Seasonal meandering of the polar front upstream of the Kerguelen Plateau Pauthenet, E. Roquet, F. Madec, G. Guinet, C. Hindell, M. McMahon, C. R. Harcourt, R. Nerini, D. 2018-09-28 application/pdf https://researchers.mq.edu.au/en/publications/12203c58-1238-4fd8-bb0b-a829e9c94405 https://doi.org/10.1029/2018GL079614 https://research-management.mq.edu.au/ws/files/94039420/93573711.pdf http://www.scopus.com/inward/record.url?scp=85053842433&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Pauthenet , E , Roquet , F , Madec , G , Guinet , C , Hindell , M , McMahon , C R , Harcourt , R & Nerini , D 2018 , ' Seasonal meandering of the polar front upstream of the Kerguelen Plateau ' , Geophysical Research Letters , vol. 45 , no. 18 , pp. 9774-9781 . https://doi.org/10.1029/2018GL079614 Antarctic Polar Front functional principal component analysis Kerguelen Plateau Southern Indian Ocean Southern Ocean fronts article 2018 ftmacquarieunicr https://doi.org/10.1029/2018GL079614 2024-07-17T23:41:14Z The location of the Antarctic Polar Front (PF) is mapped in the Southern Indian Ocean by decomposing the shape of temperature and salinity profiles into vertical modes using a functional Principal Component Analysis. We define the PF as the northernmost minimum of temperature at the subsurface and represent it as a linear combination of the first three modes. This method is applied on an ocean reanalysis data set and on in situ observations, revealing a seasonal variability of the PF latitudinal position that is most pronounced between the Conrad Rise and the Kerguelen Plateau. This shift coincides with variations in the transport across the Northern Kerguelen Plateau. We suggest that seasonal changes of the upper stratification may drive the observed variability of the PF, with potentially large implications for the pathways and residence time of water masses over the plateau and the phytoplankton bloom extending southeast of the Kerguelen Islands. Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Southern Ocean Macquarie University Research Portal Geophysical Research Letters 45 18 9774 9781 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
Antarctic Polar Front functional principal component analysis Kerguelen Plateau Southern Indian Ocean Southern Ocean fronts |
spellingShingle |
Antarctic Polar Front functional principal component analysis Kerguelen Plateau Southern Indian Ocean Southern Ocean fronts Pauthenet, E. Roquet, F. Madec, G. Guinet, C. Hindell, M. McMahon, C. R. Harcourt, R. Nerini, D. Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
topic_facet |
Antarctic Polar Front functional principal component analysis Kerguelen Plateau Southern Indian Ocean Southern Ocean fronts |
description |
The location of the Antarctic Polar Front (PF) is mapped in the Southern Indian Ocean by decomposing the shape of temperature and salinity profiles into vertical modes using a functional Principal Component Analysis. We define the PF as the northernmost minimum of temperature at the subsurface and represent it as a linear combination of the first three modes. This method is applied on an ocean reanalysis data set and on in situ observations, revealing a seasonal variability of the PF latitudinal position that is most pronounced between the Conrad Rise and the Kerguelen Plateau. This shift coincides with variations in the transport across the Northern Kerguelen Plateau. We suggest that seasonal changes of the upper stratification may drive the observed variability of the PF, with potentially large implications for the pathways and residence time of water masses over the plateau and the phytoplankton bloom extending southeast of the Kerguelen Islands. |
format |
Article in Journal/Newspaper |
author |
Pauthenet, E. Roquet, F. Madec, G. Guinet, C. Hindell, M. McMahon, C. R. Harcourt, R. Nerini, D. |
author_facet |
Pauthenet, E. Roquet, F. Madec, G. Guinet, C. Hindell, M. McMahon, C. R. Harcourt, R. Nerini, D. |
author_sort |
Pauthenet, E. |
title |
Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
title_short |
Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
title_full |
Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
title_fullStr |
Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
title_full_unstemmed |
Seasonal meandering of the polar front upstream of the Kerguelen Plateau |
title_sort |
seasonal meandering of the polar front upstream of the kerguelen plateau |
publishDate |
2018 |
url |
https://researchers.mq.edu.au/en/publications/12203c58-1238-4fd8-bb0b-a829e9c94405 https://doi.org/10.1029/2018GL079614 https://research-management.mq.edu.au/ws/files/94039420/93573711.pdf http://www.scopus.com/inward/record.url?scp=85053842433&partnerID=8YFLogxK |
genre |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Kerguelen Islands Southern Ocean |
op_source |
Pauthenet , E , Roquet , F , Madec , G , Guinet , C , Hindell , M , McMahon , C R , Harcourt , R & Nerini , D 2018 , ' Seasonal meandering of the polar front upstream of the Kerguelen Plateau ' , Geophysical Research Letters , vol. 45 , no. 18 , pp. 9774-9781 . https://doi.org/10.1029/2018GL079614 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018GL079614 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
18 |
container_start_page |
9774 |
op_container_end_page |
9781 |
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1810487724123095040 |