Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea
The application of a generalized inverse approach for assimilating vessel-mounted acoustic Doppler current profiler (VM-ADCP) data into numerical solutions of barotropic tides is described. The derived estimates of tidal currents can be used to detide the VM-ADCP data and expose underlying mean circ...
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ftoregonstate:ir.library.oregonstate.edu:8336h359h 2024-09-15T17:43:07+00:00 Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea Erofeeva, S. Y. Padman, Laurie Egbert, Gary https://ir.library.oregonstate.edu/concern/articles/8336h359h English [eng] eng unknown American Meteorological Society https://ir.library.oregonstate.edu/concern/articles/8336h359h Copyright Not Evaluated Article ftoregonstate 2024-07-22T18:06:05Z The application of a generalized inverse approach for assimilating vessel-mounted acoustic Doppler current profiler (VM-ADCP) data into numerical solutions of barotropic tides is described. The derived estimates of tidal currents can be used to detide the VM-ADCP data and expose underlying mean circulation. The methodology is illustrated with data assimilation models of tidal currents in the Ross Sea. The prior solution, obtained by solving the nonlinear shallow-water equations by time stepping with a linear bottom friction parameterization and elevation of open boundary conditions obtained from a circum-Antarctic tide model, provides reasonably good fit to most available moored current meter data. Two inverse solutions were obtained: one assimilating moored current meter records and the other assimilating three cruises of VM-ADCP data. Fitting either the mooring time series or the VM-ADCP records leads to only small changes relative to the prior solution currents, except over the shelf break where short length scale, energetic diurnal topographic vorticity waves are present. It is shown that the dynamics embedded in the representer functions provides reasonable tidal corrections even with no prior information about forcing at open boundaries. Article in Journal/Newspaper Antarc* Antarctic Ross Sea ScholarsArchive@OSU (Oregon State University) |
institution |
Open Polar |
collection |
ScholarsArchive@OSU (Oregon State University) |
op_collection_id |
ftoregonstate |
language |
English unknown |
description |
The application of a generalized inverse approach for assimilating vessel-mounted acoustic Doppler current profiler (VM-ADCP) data into numerical solutions of barotropic tides is described. The derived estimates of tidal currents can be used to detide the VM-ADCP data and expose underlying mean circulation. The methodology is illustrated with data assimilation models of tidal currents in the Ross Sea. The prior solution, obtained by solving the nonlinear shallow-water equations by time stepping with a linear bottom friction parameterization and elevation of open boundary conditions obtained from a circum-Antarctic tide model, provides reasonably good fit to most available moored current meter data. Two inverse solutions were obtained: one assimilating moored current meter records and the other assimilating three cruises of VM-ADCP data. Fitting either the mooring time series or the VM-ADCP records leads to only small changes relative to the prior solution currents, except over the shelf break where short length scale, energetic diurnal topographic vorticity waves are present. It is shown that the dynamics embedded in the representer functions provides reasonable tidal corrections even with no prior information about forcing at open boundaries. |
format |
Article in Journal/Newspaper |
author |
Erofeeva, S. Y. Padman, Laurie Egbert, Gary |
spellingShingle |
Erofeeva, S. Y. Padman, Laurie Egbert, Gary Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
author_facet |
Erofeeva, S. Y. Padman, Laurie Egbert, Gary |
author_sort |
Erofeeva, S. Y. |
title |
Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
title_short |
Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
title_full |
Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
title_fullStr |
Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
title_full_unstemmed |
Assimilation of Ship-Mounted ADCP Data for Barotropic Tides: Application to the Ross Sea |
title_sort |
assimilation of ship-mounted adcp data for barotropic tides: application to the ross sea |
publisher |
American Meteorological Society |
url |
https://ir.library.oregonstate.edu/concern/articles/8336h359h |
genre |
Antarc* Antarctic Ross Sea |
genre_facet |
Antarc* Antarctic Ross Sea |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/8336h359h |
op_rights |
Copyright Not Evaluated |
_version_ |
1810489948538667008 |