Deriving ocean surface currents from remote sensing techniques
The geostrophic relationship enables the calculation of ocean surface currents from the mean dynamic topography (MDT). The MDT can be assessed by subtracting the reference geoid from the altimetric sea surface height. Severe problems occur during the determination of the exact geoid, based on differ...
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ftawi:oai:epic.awi.de:22833 2023-05-15T18:17:34+02:00 Deriving ocean surface currents from remote sensing techniques Freiwald, Grit Losch, Martin Schuh, W. D. Becker, S. 2010 application/pdf https://epic.awi.de/id/eprint/22833/ https://epic.awi.de/id/eprint/22833/1/Fre2010c.pdf https://hdl.handle.net/10013/epic.35566 https://hdl.handle.net/10013/epic.35566.d001 unknown https://epic.awi.de/id/eprint/22833/1/Fre2010c.pdf https://hdl.handle.net/10013/epic.35566.d001 Freiwald, G. , Losch, M. orcid:0000-0002-3824-5244 , Schuh, W. D. and Becker, S. (2010) Deriving ocean surface currents from remote sensing techniques , 1. Netzwerktreffen junge Meeresforschung, DGM, Hamburg. . hdl:10013/epic.35566 EPIC31. Netzwerktreffen junge Meeresforschung, DGM, Hamburg. Conference notRev 2010 ftawi 2021-12-24T15:34:23Z The geostrophic relationship enables the calculation of ocean surface currents from the mean dynamic topography (MDT). The MDT can be assessed by subtracting the reference geoid from the altimetric sea surface height. Severe problems occur during the determination of the exact geoid, based on different scales and the projection onto a finite grid. New geoid modeling approaches also considering the omission error reveal that even GRACE data are not accurate enough for the purpose of ocean modeling. Especially in polar regions, altimetric measurements may also face problems according to the presence of sea ice. But as sea ice drift is partly driven by ocean surface currents, radar imagery allows for ocean model refinement as well. Clever image processing techniques and reasonable atmospheric (model) data are necessary for this approach. We will present and compare results for a simple section model of the Southern Ocean, give formal error estimates and indicate possibilities for profound model improvement. Conference Object Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
The geostrophic relationship enables the calculation of ocean surface currents from the mean dynamic topography (MDT). The MDT can be assessed by subtracting the reference geoid from the altimetric sea surface height. Severe problems occur during the determination of the exact geoid, based on different scales and the projection onto a finite grid. New geoid modeling approaches also considering the omission error reveal that even GRACE data are not accurate enough for the purpose of ocean modeling. Especially in polar regions, altimetric measurements may also face problems according to the presence of sea ice. But as sea ice drift is partly driven by ocean surface currents, radar imagery allows for ocean model refinement as well. Clever image processing techniques and reasonable atmospheric (model) data are necessary for this approach. We will present and compare results for a simple section model of the Southern Ocean, give formal error estimates and indicate possibilities for profound model improvement. |
format |
Conference Object |
author |
Freiwald, Grit Losch, Martin Schuh, W. D. Becker, S. |
spellingShingle |
Freiwald, Grit Losch, Martin Schuh, W. D. Becker, S. Deriving ocean surface currents from remote sensing techniques |
author_facet |
Freiwald, Grit Losch, Martin Schuh, W. D. Becker, S. |
author_sort |
Freiwald, Grit |
title |
Deriving ocean surface currents from remote sensing techniques |
title_short |
Deriving ocean surface currents from remote sensing techniques |
title_full |
Deriving ocean surface currents from remote sensing techniques |
title_fullStr |
Deriving ocean surface currents from remote sensing techniques |
title_full_unstemmed |
Deriving ocean surface currents from remote sensing techniques |
title_sort |
deriving ocean surface currents from remote sensing techniques |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/22833/ https://epic.awi.de/id/eprint/22833/1/Fre2010c.pdf https://hdl.handle.net/10013/epic.35566 https://hdl.handle.net/10013/epic.35566.d001 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
EPIC31. Netzwerktreffen junge Meeresforschung, DGM, Hamburg. |
op_relation |
https://epic.awi.de/id/eprint/22833/1/Fre2010c.pdf https://hdl.handle.net/10013/epic.35566.d001 Freiwald, G. , Losch, M. orcid:0000-0002-3824-5244 , Schuh, W. D. and Becker, S. (2010) Deriving ocean surface currents from remote sensing techniques , 1. Netzwerktreffen junge Meeresforschung, DGM, Hamburg. . hdl:10013/epic.35566 |
_version_ |
1766191927995138048 |