Sea ice assimilation into a coupled ocean–sea ice model using its adjoint
Satellite sea ice concentrations (SICs), together with several ocean parameters, are assimilated into a regional Arctic coupled ocean–sea ice model covering the period of 2000–2008 using the adjoint method. There is substantial improvement in the representation of the SIC spatial distribution, in pa...
Published in: | The Cryosphere |
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Online Access: | https://doi.org/10.5194/tc-11-2265-2017 https://doaj.org/article/a21f0f9681f04c1a9a2907bca4e1d01d |
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ftdoajarticles:oai:doaj.org/article:a21f0f9681f04c1a9a2907bca4e1d01d 2023-05-15T14:44:35+02:00 Sea ice assimilation into a coupled ocean–sea ice model using its adjoint N. V. Koldunov A. Köhl N. Serra D. Stammer 2017-09-01T00:00:00Z https://doi.org/10.5194/tc-11-2265-2017 https://doaj.org/article/a21f0f9681f04c1a9a2907bca4e1d01d EN eng Copernicus Publications https://www.the-cryosphere.net/11/2265/2017/tc-11-2265-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2265-2017 1994-0416 1994-0424 https://doaj.org/article/a21f0f9681f04c1a9a2907bca4e1d01d The Cryosphere, Vol 11, Pp 2265-2281 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-2265-2017 2022-12-31T14:56:11Z Satellite sea ice concentrations (SICs), together with several ocean parameters, are assimilated into a regional Arctic coupled ocean–sea ice model covering the period of 2000–2008 using the adjoint method. There is substantial improvement in the representation of the SIC spatial distribution, in particular with respect to the position of the ice edge and to the concentrations in the central parts of the Arctic Ocean during summer months. Seasonal cycles of total Arctic sea ice area show an overall improvement. During summer months, values of sea ice extent (SIE) integrated over the model domain become underestimated compared to observations, but absolute differences of mean SIE to the data are reduced in nearly all months and years. Along with the SICs, the sea ice thickness fields also become closer to observations, providing added value by the assimilation. Very sparse ocean data in the Arctic, corresponding to a very small contribution to the cost function, prevent sizable improvements of assimilated ocean variables, with the exception of the sea surface temperature. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean The Cryosphere 11 5 2265 2281 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 N. V. Koldunov A. Köhl N. Serra D. Stammer Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Satellite sea ice concentrations (SICs), together with several ocean parameters, are assimilated into a regional Arctic coupled ocean–sea ice model covering the period of 2000–2008 using the adjoint method. There is substantial improvement in the representation of the SIC spatial distribution, in particular with respect to the position of the ice edge and to the concentrations in the central parts of the Arctic Ocean during summer months. Seasonal cycles of total Arctic sea ice area show an overall improvement. During summer months, values of sea ice extent (SIE) integrated over the model domain become underestimated compared to observations, but absolute differences of mean SIE to the data are reduced in nearly all months and years. Along with the SICs, the sea ice thickness fields also become closer to observations, providing added value by the assimilation. Very sparse ocean data in the Arctic, corresponding to a very small contribution to the cost function, prevent sizable improvements of assimilated ocean variables, with the exception of the sea surface temperature. |
format |
Article in Journal/Newspaper |
author |
N. V. Koldunov A. Köhl N. Serra D. Stammer |
author_facet |
N. V. Koldunov A. Köhl N. Serra D. Stammer |
author_sort |
N. V. Koldunov |
title |
Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
title_short |
Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
title_full |
Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
title_fullStr |
Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
title_full_unstemmed |
Sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
title_sort |
sea ice assimilation into a coupled ocean–sea ice model using its adjoint |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-2265-2017 https://doaj.org/article/a21f0f9681f04c1a9a2907bca4e1d01d |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice The Cryosphere |
genre_facet |
Arctic Arctic Ocean Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 11, Pp 2265-2281 (2017) |
op_relation |
https://www.the-cryosphere.net/11/2265/2017/tc-11-2265-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2265-2017 1994-0416 1994-0424 https://doaj.org/article/a21f0f9681f04c1a9a2907bca4e1d01d |
op_doi |
https://doi.org/10.5194/tc-11-2265-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
5 |
container_start_page |
2265 |
op_container_end_page |
2281 |
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1766316080507125760 |