An ETKF approach for initial state and parameter estimation in ice sheet modelling
Estimating the contribution of Antarctica and Greenland to sea-level rise is a hot topic in glaciology. Good estimates rely on our ability to run a precisely calibrated ice sheet evolution model starting from a reliable initial state. Data assimilation aims to provide an answer to this problem by co...
Published in: | Nonlinear Processes in Geophysics |
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Online Access: | https://doi.org/10.5194/npg-21-569-2014 https://npg.copernicus.org/articles/21/569/2014/ |
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ftcopernicus:oai:publications.copernicus.org:npg21224 2023-05-15T13:54:27+02:00 An ETKF approach for initial state and parameter estimation in ice sheet modelling Bonan, B. Nodet, M. Ritz, C. Peyaud, V. 2018-01-15 application/pdf https://doi.org/10.5194/npg-21-569-2014 https://npg.copernicus.org/articles/21/569/2014/ eng eng doi:10.5194/npg-21-569-2014 https://npg.copernicus.org/articles/21/569/2014/ eISSN: 1607-7946 Text 2018 ftcopernicus https://doi.org/10.5194/npg-21-569-2014 2020-07-20T16:25:07Z Estimating the contribution of Antarctica and Greenland to sea-level rise is a hot topic in glaciology. Good estimates rely on our ability to run a precisely calibrated ice sheet evolution model starting from a reliable initial state. Data assimilation aims to provide an answer to this problem by combining the model equations with observations. In this paper we aim to study a state-of-the-art ensemble Kalman filter (ETKF) to address this problem. This method is implemented and validated in the twin experiments framework for a shallow ice flowline model of ice dynamics. The results are very encouraging, as they show a good convergence of the ETKF (with localisation and inflation), even for small-sized ensembles. Text Antarc* Antarctica Greenland Ice Sheet Copernicus Publications: E-Journals Greenland Nonlinear Processes in Geophysics 21 2 569 582 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Estimating the contribution of Antarctica and Greenland to sea-level rise is a hot topic in glaciology. Good estimates rely on our ability to run a precisely calibrated ice sheet evolution model starting from a reliable initial state. Data assimilation aims to provide an answer to this problem by combining the model equations with observations. In this paper we aim to study a state-of-the-art ensemble Kalman filter (ETKF) to address this problem. This method is implemented and validated in the twin experiments framework for a shallow ice flowline model of ice dynamics. The results are very encouraging, as they show a good convergence of the ETKF (with localisation and inflation), even for small-sized ensembles. |
format |
Text |
author |
Bonan, B. Nodet, M. Ritz, C. Peyaud, V. |
spellingShingle |
Bonan, B. Nodet, M. Ritz, C. Peyaud, V. An ETKF approach for initial state and parameter estimation in ice sheet modelling |
author_facet |
Bonan, B. Nodet, M. Ritz, C. Peyaud, V. |
author_sort |
Bonan, B. |
title |
An ETKF approach for initial state and parameter estimation in ice sheet modelling |
title_short |
An ETKF approach for initial state and parameter estimation in ice sheet modelling |
title_full |
An ETKF approach for initial state and parameter estimation in ice sheet modelling |
title_fullStr |
An ETKF approach for initial state and parameter estimation in ice sheet modelling |
title_full_unstemmed |
An ETKF approach for initial state and parameter estimation in ice sheet modelling |
title_sort |
etkf approach for initial state and parameter estimation in ice sheet modelling |
publishDate |
2018 |
url |
https://doi.org/10.5194/npg-21-569-2014 https://npg.copernicus.org/articles/21/569/2014/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_source |
eISSN: 1607-7946 |
op_relation |
doi:10.5194/npg-21-569-2014 https://npg.copernicus.org/articles/21/569/2014/ |
op_doi |
https://doi.org/10.5194/npg-21-569-2014 |
container_title |
Nonlinear Processes in Geophysics |
container_volume |
21 |
container_issue |
2 |
container_start_page |
569 |
op_container_end_page |
582 |
_version_ |
1766260366933753856 |