Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology
In this study, we investigate the fully multivariate state and parameter estimation through idealised simulations of a dynamics-only model that uses the novel Maxwell elasto-brittle (MEB) sea-ice rheology and in which we estimate not only the sea-ice concentration, thickness and velocity, but also i...
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ftcopernicus:oai:publications.copernicus.org:egusphere113857 2024-06-23T07:56:38+00:00 Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology Chen, Yumeng Smith, Polly Carrassi, Alberto Pasmans, Ivo Bertino, Laurent Bocquet, Marc Finn, Tobias Sebastian Rampal, Pierre Dansereau, Véronique 2024-05-14 application/pdf https://doi.org/10.5194/egusphere-2023-1809 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1809/ eng eng doi:10.5194/egusphere-2023-1809 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1809/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2023-1809 2024-06-13T01:23:50Z In this study, we investigate the fully multivariate state and parameter estimation through idealised simulations of a dynamics-only model that uses the novel Maxwell elasto-brittle (MEB) sea-ice rheology and in which we estimate not only the sea-ice concentration, thickness and velocity, but also its level of damage, internal stress and cohesion. Specifically, we estimate the air drag coefficient and the so-called damage parameter of the MEB model. Mimicking the realistic observation network with different combinations of observations, we demonstrate that various issues can potentially arise in a complex sea-ice model, especially in instances for which the external forcing dominates the model forecast error growth. Even though further investigation will be needed using an operational (a coupled dynamics–thermodynamics) sea-ice model, we show that, with the current observation network, it is possible to improve both the observed and the unobserved model state forecast and parameter accuracy. Text Sea ice Copernicus Publications: E-Journals |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
In this study, we investigate the fully multivariate state and parameter estimation through idealised simulations of a dynamics-only model that uses the novel Maxwell elasto-brittle (MEB) sea-ice rheology and in which we estimate not only the sea-ice concentration, thickness and velocity, but also its level of damage, internal stress and cohesion. Specifically, we estimate the air drag coefficient and the so-called damage parameter of the MEB model. Mimicking the realistic observation network with different combinations of observations, we demonstrate that various issues can potentially arise in a complex sea-ice model, especially in instances for which the external forcing dominates the model forecast error growth. Even though further investigation will be needed using an operational (a coupled dynamics–thermodynamics) sea-ice model, we show that, with the current observation network, it is possible to improve both the observed and the unobserved model state forecast and parameter accuracy. |
format |
Text |
author |
Chen, Yumeng Smith, Polly Carrassi, Alberto Pasmans, Ivo Bertino, Laurent Bocquet, Marc Finn, Tobias Sebastian Rampal, Pierre Dansereau, Véronique |
spellingShingle |
Chen, Yumeng Smith, Polly Carrassi, Alberto Pasmans, Ivo Bertino, Laurent Bocquet, Marc Finn, Tobias Sebastian Rampal, Pierre Dansereau, Véronique Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
author_facet |
Chen, Yumeng Smith, Polly Carrassi, Alberto Pasmans, Ivo Bertino, Laurent Bocquet, Marc Finn, Tobias Sebastian Rampal, Pierre Dansereau, Véronique |
author_sort |
Chen, Yumeng |
title |
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
title_short |
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
title_full |
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
title_fullStr |
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
title_full_unstemmed |
Multivariate state and parameter estimation with data assimilation on sea-ice models using a Maxwell-Elasto-Brittle rheology |
title_sort |
multivariate state and parameter estimation with data assimilation on sea-ice models using a maxwell-elasto-brittle rheology |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-1809 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1809/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-1809 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-1809/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-1809 |
_version_ |
1802649908112523264 |