Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic
This paper shows that the mean flow of an eddy-permitting model can be altered by assimilationof surface height variability, providing that information about the mean sea surface is included,using an adaption of a statistical-dynamical method devised by Oschlies and Willebrand. Weshow that for a res...
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ftawi:oai:epic.awi.de:5007 2024-09-15T18:23:12+00:00 Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic Killworth, P. D. Dieterich, C. Le Provost, C. Oschlies, A. Willebrand, J. 2001 application/pdf https://epic.awi.de/id/eprint/5007/ https://epic.awi.de/id/eprint/5007/1/Kil2001a.pdf https://hdl.handle.net/10013/epic.15575 https://hdl.handle.net/10013/epic.15575.d001 unknown https://epic.awi.de/id/eprint/5007/1/Kil2001a.pdf https://hdl.handle.net/10013/epic.15575.d001 Killworth, P. D. , Dieterich, C. , Le Provost, C. , Oschlies, A. and Willebrand, J. (2001) Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic , Progress in Oceanography, 48 (2), pp. 313-335 . hdl:10013/epic.15575 EPIC3Progress in Oceanography, 48(2), pp. 313-335, ISSN: 0079-6611 Article isiRev 2001 ftawi 2024-06-24T03:54:51Z This paper shows that the mean flow of an eddy-permitting model can be altered by assimilationof surface height variability, providing that information about the mean sea surface is included,using an adaption of a statistical-dynamical method devised by Oschlies and Willebrand. Weshow that for a restricted depth range (about 1000 m), dynamical knowledge can make up for thenull space present in surface data whose temporal extent may be too short to distinguish betweenvertical modes. The lack of an accurate geoid has meant that most assimilation methods, whilerepresenting variability well, have been unable to modify the mean flow to any extent. However,we show that by including several approximate forms for the mean sea surface, the mean interiorflow in the upper kilometer can be rapidly adjusted towards reality by the assimilation, with thelocation of major current systems moved by hundreds of kilometers. Article in Journal/Newspaper North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
This paper shows that the mean flow of an eddy-permitting model can be altered by assimilationof surface height variability, providing that information about the mean sea surface is included,using an adaption of a statistical-dynamical method devised by Oschlies and Willebrand. Weshow that for a restricted depth range (about 1000 m), dynamical knowledge can make up for thenull space present in surface data whose temporal extent may be too short to distinguish betweenvertical modes. The lack of an accurate geoid has meant that most assimilation methods, whilerepresenting variability well, have been unable to modify the mean flow to any extent. However,we show that by including several approximate forms for the mean sea surface, the mean interiorflow in the upper kilometer can be rapidly adjusted towards reality by the assimilation, with thelocation of major current systems moved by hundreds of kilometers. |
format |
Article in Journal/Newspaper |
author |
Killworth, P. D. Dieterich, C. Le Provost, C. Oschlies, A. Willebrand, J. |
spellingShingle |
Killworth, P. D. Dieterich, C. Le Provost, C. Oschlies, A. Willebrand, J. Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
author_facet |
Killworth, P. D. Dieterich, C. Le Provost, C. Oschlies, A. Willebrand, J. |
author_sort |
Killworth, P. D. |
title |
Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
title_short |
Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
title_full |
Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
title_fullStr |
Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
title_full_unstemmed |
Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic |
title_sort |
assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the north atlantic |
publishDate |
2001 |
url |
https://epic.awi.de/id/eprint/5007/ https://epic.awi.de/id/eprint/5007/1/Kil2001a.pdf https://hdl.handle.net/10013/epic.15575 https://hdl.handle.net/10013/epic.15575.d001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EPIC3Progress in Oceanography, 48(2), pp. 313-335, ISSN: 0079-6611 |
op_relation |
https://epic.awi.de/id/eprint/5007/1/Kil2001a.pdf https://hdl.handle.net/10013/epic.15575.d001 Killworth, P. D. , Dieterich, C. , Le Provost, C. , Oschlies, A. and Willebrand, J. (2001) Assimilation of altimetric data and mean sea surface height into an eddy-permitting model of the North Atlantic , Progress in Oceanography, 48 (2), pp. 313-335 . hdl:10013/epic.15575 |
_version_ |
1810463355855437824 |