Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport
Using four-dimensional variational analysis, we produce an estimate of the state of a coastal region in Northern Norway during the late winter and spring in 1984. We use satellite sea surface temperature and in situ observations from a series of intensive field campaigns, and obtain a more realistic...
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Online Access: | https://hdl.handle.net/1956/16174 https://doi.org/10.1002/2016jc012640 |
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ftunivbergen:oai:bora.uib.no:1956/16174 2023-05-15T17:43:25+02:00 Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport Sperrevik, Ann Kristin Röhrs, Johannes Christensen, Kai Håkon 2017 application/pdf https://hdl.handle.net/1956/16174 https://doi.org/10.1002/2016jc012640 eng eng Wiley Modeling coastal circulation in Norway using a high-resolution 4D-Var ocean assimilation system urn:issn:2169-9275 https://hdl.handle.net/1956/16174 https://doi.org/10.1002/2016jc012640 Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2017 The Authors Journal of Geophysical Research: Oceans 122 7 5445-5457 Peer reviewed Journal article 2017 ftunivbergen https://doi.org/10.1002/2016jc012640 2023-03-14T17:44:53Z Using four-dimensional variational analysis, we produce an estimate of the state of a coastal region in Northern Norway during the late winter and spring in 1984. We use satellite sea surface temperature and in situ observations from a series of intensive field campaigns, and obtain a more realistic distribution of water masses both in the horizontal and the vertical than a pure downscaling approach can achieve. Although the distribution of Eulerian surface current speeds are similar, we find that they are more variable and less dependent on model bathymetry in our reanalysis compared to a hindcast produced using the same modeling system. Lagrangian drift currents on the other hand are significantly changed, with overall higher kinetic energy levels in the reanalysis than in the hindcast, particularly in the superinertial frequency band. publishedVersion Article in Journal/Newspaper Northern Norway University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway Journal of Geophysical Research: Oceans 122 7 5445 5457 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Using four-dimensional variational analysis, we produce an estimate of the state of a coastal region in Northern Norway during the late winter and spring in 1984. We use satellite sea surface temperature and in situ observations from a series of intensive field campaigns, and obtain a more realistic distribution of water masses both in the horizontal and the vertical than a pure downscaling approach can achieve. Although the distribution of Eulerian surface current speeds are similar, we find that they are more variable and less dependent on model bathymetry in our reanalysis compared to a hindcast produced using the same modeling system. Lagrangian drift currents on the other hand are significantly changed, with overall higher kinetic energy levels in the reanalysis than in the hindcast, particularly in the superinertial frequency band. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Sperrevik, Ann Kristin Röhrs, Johannes Christensen, Kai Håkon |
spellingShingle |
Sperrevik, Ann Kristin Röhrs, Johannes Christensen, Kai Håkon Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
author_facet |
Sperrevik, Ann Kristin Röhrs, Johannes Christensen, Kai Håkon |
author_sort |
Sperrevik, Ann Kristin |
title |
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
title_short |
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
title_full |
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
title_fullStr |
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
title_full_unstemmed |
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport |
title_sort |
impact of data assimilation on eulerian versus lagrangian estimates of upper ocean transport |
publisher |
Wiley |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/16174 https://doi.org/10.1002/2016jc012640 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Journal of Geophysical Research: Oceans 122 7 5445-5457 |
op_relation |
Modeling coastal circulation in Norway using a high-resolution 4D-Var ocean assimilation system urn:issn:2169-9275 https://hdl.handle.net/1956/16174 https://doi.org/10.1002/2016jc012640 |
op_rights |
Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2017 The Authors |
op_doi |
https://doi.org/10.1002/2016jc012640 |
container_title |
Journal of Geophysical Research: Oceans |
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122 |
container_issue |
7 |
container_start_page |
5445 |
op_container_end_page |
5457 |
_version_ |
1766145487194292224 |