Investigation of the summer Kara Sea circulation employing a variational data assimilation technique
Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 112 (2007): C04S15, doi:10.1029/2006JC003728. The summer circu...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3672 2023-05-15T15:15:47+02:00 Investigation of the summer Kara Sea circulation employing a variational data assimilation technique Panteleev, G. Proshutinsky, Andrey Kulakov, M. Nechaev, D. A. Maslowski, Wieslaw 2007-04-06 application/pdf https://hdl.handle.net/1912/3672 en_US eng American Geophysical Union https://doi.org/10.1029/2006JC003728 Journal of Geophysical Research 112 (2007): C04S15 https://hdl.handle.net/1912/3672 doi:10.1029/2006JC003728 Journal of Geophysical Research 112 (2007): C04S15 doi:10.1029/2006JC003728 Kara Sea Variational approach Numerical modeling Article 2007 ftwhoas https://doi.org/10.1029/2006JC003728 2022-05-28T22:58:02Z Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 112 (2007): C04S15, doi:10.1029/2006JC003728. The summer circulations and hydrographic fields of the Kara Sea are reconstructed for mean, positive and negative Arctic Oscillation regimes employing a variational data assimilation technique which provides the best fit of reconstructed fields to climatological data and satisfies dynamical and kinematic constraints of a quasi-stationary primitive equation ocean circulation model. The reconstructed circulations agree well with the measurements and are characterized by inflow of 0.63, 0.8, 0.51 Sv through Kara Gate and 1.18, 1.1, 1.12 Sv between Novaya Zemlya and Franz Josef Land, for mean climatologic conditions, positive and negative AO indexes, respectively. The major regions of water outflow for these regimes are the St. Anna Trough (1.17, 1.21, 1.34 Sv) and Vilkitsky/Shokalsky Straits (0.52, 0.7, 0.51 Sv). The optimized velocity pattern for the mean climatological summer reveals a strong anticyclonic circulation in the central part of the Kara Sea (Region of Fresh Water Inflow, ROFI zone) and is confirmed by ADCP surveys and laboratory modeling. This circulation is well pronounced for both high and low AO phases, but in the positive AO phase it is shifted approximately 200 km west relatively to its climatological center. During the negative AO phase the ROFI locaion is close to its climatological position. The results of the variational data assimilation approach were compared with the simulated data from the Hamburg Shelf Ocean Model (HAMSOM) and Naval Postgraduate School 18 km resolution (NPS-18) model to validate these models. This research is supported by the Frontier Research System for Global Change, through JAMSTEC, Japan, and by the National Science Foundation Office of Polar Programs (under cooperative agreements ... Article in Journal/Newspaper Arctic Franz Josef Land Kara Sea National Science Foundation Office of Polar Programs Novaya Zemlya Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Franz Josef Land ENVELOPE(55.000,55.000,81.000,81.000) Kara Sea St. Anna Trough ENVELOPE(69.500,69.500,80.750,80.750) Journal of Geophysical Research 112 C4 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Kara Sea Variational approach Numerical modeling |
spellingShingle |
Kara Sea Variational approach Numerical modeling Panteleev, G. Proshutinsky, Andrey Kulakov, M. Nechaev, D. A. Maslowski, Wieslaw Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
topic_facet |
Kara Sea Variational approach Numerical modeling |
description |
Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 112 (2007): C04S15, doi:10.1029/2006JC003728. The summer circulations and hydrographic fields of the Kara Sea are reconstructed for mean, positive and negative Arctic Oscillation regimes employing a variational data assimilation technique which provides the best fit of reconstructed fields to climatological data and satisfies dynamical and kinematic constraints of a quasi-stationary primitive equation ocean circulation model. The reconstructed circulations agree well with the measurements and are characterized by inflow of 0.63, 0.8, 0.51 Sv through Kara Gate and 1.18, 1.1, 1.12 Sv between Novaya Zemlya and Franz Josef Land, for mean climatologic conditions, positive and negative AO indexes, respectively. The major regions of water outflow for these regimes are the St. Anna Trough (1.17, 1.21, 1.34 Sv) and Vilkitsky/Shokalsky Straits (0.52, 0.7, 0.51 Sv). The optimized velocity pattern for the mean climatological summer reveals a strong anticyclonic circulation in the central part of the Kara Sea (Region of Fresh Water Inflow, ROFI zone) and is confirmed by ADCP surveys and laboratory modeling. This circulation is well pronounced for both high and low AO phases, but in the positive AO phase it is shifted approximately 200 km west relatively to its climatological center. During the negative AO phase the ROFI locaion is close to its climatological position. The results of the variational data assimilation approach were compared with the simulated data from the Hamburg Shelf Ocean Model (HAMSOM) and Naval Postgraduate School 18 km resolution (NPS-18) model to validate these models. This research is supported by the Frontier Research System for Global Change, through JAMSTEC, Japan, and by the National Science Foundation Office of Polar Programs (under cooperative agreements ... |
format |
Article in Journal/Newspaper |
author |
Panteleev, G. Proshutinsky, Andrey Kulakov, M. Nechaev, D. A. Maslowski, Wieslaw |
author_facet |
Panteleev, G. Proshutinsky, Andrey Kulakov, M. Nechaev, D. A. Maslowski, Wieslaw |
author_sort |
Panteleev, G. |
title |
Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
title_short |
Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
title_full |
Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
title_fullStr |
Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
title_full_unstemmed |
Investigation of the summer Kara Sea circulation employing a variational data assimilation technique |
title_sort |
investigation of the summer kara sea circulation employing a variational data assimilation technique |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
https://hdl.handle.net/1912/3672 |
long_lat |
ENVELOPE(55.000,55.000,81.000,81.000) ENVELOPE(69.500,69.500,80.750,80.750) |
geographic |
Arctic Franz Josef Land Kara Sea St. Anna Trough |
geographic_facet |
Arctic Franz Josef Land Kara Sea St. Anna Trough |
genre |
Arctic Franz Josef Land Kara Sea National Science Foundation Office of Polar Programs Novaya Zemlya |
genre_facet |
Arctic Franz Josef Land Kara Sea National Science Foundation Office of Polar Programs Novaya Zemlya |
op_source |
Journal of Geophysical Research 112 (2007): C04S15 doi:10.1029/2006JC003728 |
op_relation |
https://doi.org/10.1029/2006JC003728 Journal of Geophysical Research 112 (2007): C04S15 https://hdl.handle.net/1912/3672 doi:10.1029/2006JC003728 |
op_doi |
https://doi.org/10.1029/2006JC003728 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C4 |
_version_ |
1766346128959209472 |