Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data
Abstract. The location of the Antarctic Polar Front (PF) was mapped over a 7-year period (1987-1993) within images of satellite-derived sea surface temperature. The mean path of the PF is strongly steered by the topographic features of the Southern Ocean. The topography places vorticity constraints...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.470.6055 2023-05-15T13:37:07+02:00 Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data J. Keith Moore Mark R. Abbott James G. Richman The Pennsylvania State University CiteSeerX Archives 1999 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.6055 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.6055 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 The Antarctic Polar Front (PF or Antarctic Convergence text 1999 ftciteseerx 2016-01-08T07:15:45Z Abstract. The location of the Antarctic Polar Front (PF) was mapped over a 7-year period (1987-1993) within images of satellite-derived sea surface temperature. The mean path of the PF is strongly steered by the topographic features of the Southern Ocean. The topography places vorticity constraints on the dynamics of the PF that strongly affect spatial and temporal variability. Over the deep ocean basins the surface expression of the PF is weakened, and the PF meanders over a wide latitudinal range. Near large topographic features, width and temperature change across the front increase, and large-scale meandering is inhibited. Elevated mesoscale variability is seen within and downstream of these areas and may be the result of baroclinic instabilities initiated where the PF encounters large topographic features. The strong correlations between topography and PF dynamics can be understood in the context of the planetary potential vorticity (PPV or f/H) field. Mean PPV at the PF varies by more than a factor of 2 along its circumpolar path. However, at the mesoscale the PF remains within a relatively narrow range ot m' values around the local mean. Away from large topographic features, the PF returns to a preferred PPV value of-25 x 10-9 m-1 s-1 despite large latitudinal shifts. The mean paths of the surface and subsurface expressions of the PF are closely coupled over much of the Southern Ocean. Text Antarc* Antarctic Southern Ocean Unknown Antarctic Southern Ocean The Antarctic |
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ftciteseerx |
language |
English |
topic |
The Antarctic Polar Front (PF or Antarctic Convergence |
spellingShingle |
The Antarctic Polar Front (PF or Antarctic Convergence J. Keith Moore Mark R. Abbott James G. Richman Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
topic_facet |
The Antarctic Polar Front (PF or Antarctic Convergence |
description |
Abstract. The location of the Antarctic Polar Front (PF) was mapped over a 7-year period (1987-1993) within images of satellite-derived sea surface temperature. The mean path of the PF is strongly steered by the topographic features of the Southern Ocean. The topography places vorticity constraints on the dynamics of the PF that strongly affect spatial and temporal variability. Over the deep ocean basins the surface expression of the PF is weakened, and the PF meanders over a wide latitudinal range. Near large topographic features, width and temperature change across the front increase, and large-scale meandering is inhibited. Elevated mesoscale variability is seen within and downstream of these areas and may be the result of baroclinic instabilities initiated where the PF encounters large topographic features. The strong correlations between topography and PF dynamics can be understood in the context of the planetary potential vorticity (PPV or f/H) field. Mean PPV at the PF varies by more than a factor of 2 along its circumpolar path. However, at the mesoscale the PF remains within a relatively narrow range ot m' values around the local mean. Away from large topographic features, the PF returns to a preferred PPV value of-25 x 10-9 m-1 s-1 despite large latitudinal shifts. The mean paths of the surface and subsurface expressions of the PF are closely coupled over much of the Southern Ocean. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. Keith Moore Mark R. Abbott James G. Richman |
author_facet |
J. Keith Moore Mark R. Abbott James G. Richman |
author_sort |
J. Keith Moore |
title |
Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
title_short |
Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
title_full |
Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
title_fullStr |
Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
title_full_unstemmed |
Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data |
title_sort |
location and dynamics of the antarctic polar front from satellite sea surface temperature data |
publishDate |
1999 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.6055 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.470.6055 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/14964/Moore_et_al_JGR_1999.pdf?sequence=1 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766088258586935296 |