Journal articles
Seasonal Meandering of the Polar Front Upstream of the Kerguelen Plateau
Abstract : 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 andrepresent 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 thepathways and residence time of water masses over the plateau and the phytoplankton bloom extending southeast of the Kerguelen Islands.
https://hal-amu.archives-ouvertes.fr/hal-02024254
Contributor : Valerie Michotey Connect in order to contact the contributor
Submitted on : Saturday, May 15, 2021 - 8:32:40 AM
Last modification on : Thursday, May 12, 2022 - 3:38:32 PM
Long-term archiving on: : Monday, August 16, 2021 - 6:04:11 PM
Contributor : Valerie Michotey Connect in order to contact the contributor
Submitted on : Saturday, May 15, 2021 - 8:32:40 AM
Last modification on : Thursday, May 12, 2022 - 3:38:32 PM
Long-term archiving on: : Monday, August 16, 2021 - 6:04:11 PM
File
2018GL079614.pdf
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Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License