Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application
Abstract. The mean sea surface height across the Antarctic Circumpolar Current has been reconstructed from height variability measured by the Geosat altimeter without assuming prior knowledge of the geoid. For this study, an automated technique has been developed to estimate mean sea surface height...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.411.9826 2023-05-15T13:45:34+02:00 Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application Sarah T. Gille The Pennsylvania State University CiteSeerX Archives 1994 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.411.9826 http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.411.9826 http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf text 1994 ftciteseerx 2016-01-08T03:23:42Z Abstract. The mean sea surface height across the Antarctic Circumpolar Current has been reconstructed from height variability measured by the Geosat altimeter without assuming prior knowledge of the geoid. For this study, an automated technique has been developed to estimate mean sea surface height for each satellite ground track using a meandering Gaussian jet model, and errors have been estimated using Monte Carlo simulation. The results are objectively mapped to produce a picture of the mean Subantarctic and Polar Fronts, which together comprise the major components of the Antarctic Circumpolar Current. The meandering jet model explains between 40 % and 70 % of the height variance along the jet axes. The results show that the fronts are substantially steered by topography and that the jets have an average Gaussian width of about 44 km in the meridional direction and meander about 75 km to either side of their mean locations. The average height difference across the Subantarctic Front (SAF) is 0.7 m and across the Polar Front (PF) 0.6 m. The mean widths of the fronts are correlated with the size of the baroclinic Rossby radius. 1. Text Antarc* Antarctic Unknown Antarctic The Antarctic |
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ftciteseerx |
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English |
description |
Abstract. The mean sea surface height across the Antarctic Circumpolar Current has been reconstructed from height variability measured by the Geosat altimeter without assuming prior knowledge of the geoid. For this study, an automated technique has been developed to estimate mean sea surface height for each satellite ground track using a meandering Gaussian jet model, and errors have been estimated using Monte Carlo simulation. The results are objectively mapped to produce a picture of the mean Subantarctic and Polar Fronts, which together comprise the major components of the Antarctic Circumpolar Current. The meandering jet model explains between 40 % and 70 % of the height variance along the jet axes. The results show that the fronts are substantially steered by topography and that the jets have an average Gaussian width of about 44 km in the meridional direction and meander about 75 km to either side of their mean locations. The average height difference across the Subantarctic Front (SAF) is 0.7 m and across the Polar Front (PF) 0.6 m. The mean widths of the fronts are correlated with the size of the baroclinic Rossby radius. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sarah T. Gille |
spellingShingle |
Sarah T. Gille Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
author_facet |
Sarah T. Gille |
author_sort |
Sarah T. Gille |
title |
Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
title_short |
Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
title_full |
Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
title_fullStr |
Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
title_full_unstemmed |
Mean sea surface height of the Antarctic Circumpolar Current from Geosat data: Method and application |
title_sort |
mean sea surface height of the antarctic circumpolar current from geosat data: method and application |
publishDate |
1994 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.411.9826 http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.411.9826 http://www-pord.ucsd.edu/~sgille/pub_dir/94JC01172.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766227639749574656 |