Improved representation of Southern Ocean fronts in a finite element ocean model
Orsi et al. 1995 determined the positions of fronts in Southern Ocean based on the water mass criteria from hydrographic sections data. Following Orsi et al. 1995 three main Southern Ocean fronts are distinguished, the subantarctic front (SAF), the polar front (PF) and the southern Antarctic Circump...
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ftawi:oai:epic.awi.de:30754 2023-05-15T13:46:52+02:00 Improved representation of Southern Ocean fronts in a finite element ocean model Janjic Pfander, Tijana Timmermann, Ralph Schröter, Jens 2012-04 https://epic.awi.de/id/eprint/30754/ https://hdl.handle.net/10013/epic.39683 unknown Janjic Pfander, T. , Timmermann, R. and Schröter, J. orcid:0000-0002-9240-5798 (2012) Improved representation of Southern Ocean fronts in a finite element ocean model , EGU, Vienna, 22 April 2012 - 27 April 2012 . hdl:10013/epic.39683 EPIC3EGU, Vienna, 2012-04-22-2012-04-27 Conference notRev 2012 ftawi 2021-12-24T15:37:49Z Orsi et al. 1995 determined the positions of fronts in Southern Ocean based on the water mass criteria from hydrographic sections data. Following Orsi et al. 1995 three main Southern Ocean fronts are distinguished, the subantarctic front (SAF), the polar front (PF) and the southern Antarctic Circumpolar current (sACC) front. All three fronts are continuous features of the ACC, and extend from the sea surface to the deep ocean. Several studies used satellite observations (gradients of sea surface height and sea surface temperature) to locate ACC fronts. In recent work by Sokolov and Rintoul 2009, the authors introduced south, north and middle branches of each of the three major fronts. The position of the branches are determined based on the contour lines of absolute SSH, where the absolute SSH values were calculated by adding the SSH anomalies to the mean surface dynamic height (relative to 2500 dbar) derived from the World Ocean Circulation Experiment climatology. In this work, we estimate the locations of the Southern Ocean fronts using the finite element ocean model and the same criteria as specified in Orsi et al. 1995. The ocean model representation of the locations of fronts is improved by assimilating dynamical ocean topography (DOT) data. In our study, the DOT is generated using the satellite altimetry and our knowledge of the geoid as given by the GOCO2S model which combines GRACE and GOCE gravity data. In addition, front locations determined in such a way are compared to the streamline approach of Sokolov and Rintoul 2009. Conference Object Antarc* Antarctic Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Orsi et al. 1995 determined the positions of fronts in Southern Ocean based on the water mass criteria from hydrographic sections data. Following Orsi et al. 1995 three main Southern Ocean fronts are distinguished, the subantarctic front (SAF), the polar front (PF) and the southern Antarctic Circumpolar current (sACC) front. All three fronts are continuous features of the ACC, and extend from the sea surface to the deep ocean. Several studies used satellite observations (gradients of sea surface height and sea surface temperature) to locate ACC fronts. In recent work by Sokolov and Rintoul 2009, the authors introduced south, north and middle branches of each of the three major fronts. The position of the branches are determined based on the contour lines of absolute SSH, where the absolute SSH values were calculated by adding the SSH anomalies to the mean surface dynamic height (relative to 2500 dbar) derived from the World Ocean Circulation Experiment climatology. In this work, we estimate the locations of the Southern Ocean fronts using the finite element ocean model and the same criteria as specified in Orsi et al. 1995. The ocean model representation of the locations of fronts is improved by assimilating dynamical ocean topography (DOT) data. In our study, the DOT is generated using the satellite altimetry and our knowledge of the geoid as given by the GOCO2S model which combines GRACE and GOCE gravity data. In addition, front locations determined in such a way are compared to the streamline approach of Sokolov and Rintoul 2009. |
format |
Conference Object |
author |
Janjic Pfander, Tijana Timmermann, Ralph Schröter, Jens |
spellingShingle |
Janjic Pfander, Tijana Timmermann, Ralph Schröter, Jens Improved representation of Southern Ocean fronts in a finite element ocean model |
author_facet |
Janjic Pfander, Tijana Timmermann, Ralph Schröter, Jens |
author_sort |
Janjic Pfander, Tijana |
title |
Improved representation of Southern Ocean fronts in a finite element ocean model |
title_short |
Improved representation of Southern Ocean fronts in a finite element ocean model |
title_full |
Improved representation of Southern Ocean fronts in a finite element ocean model |
title_fullStr |
Improved representation of Southern Ocean fronts in a finite element ocean model |
title_full_unstemmed |
Improved representation of Southern Ocean fronts in a finite element ocean model |
title_sort |
improved representation of southern ocean fronts in a finite element ocean model |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30754/ https://hdl.handle.net/10013/epic.39683 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
EPIC3EGU, Vienna, 2012-04-22-2012-04-27 |
op_relation |
Janjic Pfander, T. , Timmermann, R. and Schröter, J. orcid:0000-0002-9240-5798 (2012) Improved representation of Southern Ocean fronts in a finite element ocean model , EGU, Vienna, 22 April 2012 - 27 April 2012 . hdl:10013/epic.39683 |
_version_ |
1766245468843540480 |