Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean
The seasonally dependent Antarctic sea ice concentration (SIC) budget is well observed and synthesizes many important air–sea–ice interaction processes. However, it is rarely well simulated in Earth system models, and means to tune the former are not well understood. In this study, we investigate th...
Published in: | Geoscientific Model Development |
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Online Access: | https://doi.org/10.5194/gmd-16-1395-2023 |
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ftzenodo:oai:zenodo.org:8066136 2024-09-15T17:48:34+00:00 Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean Nie, Yafei Li, Chengkun Vancoppenolle, Martin Cheng, Bin Dias, Fabio Boeira Lv, Xianqing Uotila, Petteri 2023-03-02 https://doi.org/10.5194/gmd-16-1395-2023 eng eng Zenodo https://zenodo.org/communities/polarres https://zenodo.org/communities/eu https://doi.org/10.5194/gmd-16-1395-2023 oai:zenodo.org:8066136 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/article 2023 ftzenodo https://doi.org/10.5194/gmd-16-1395-2023 2024-07-26T18:48:10Z The seasonally dependent Antarctic sea ice concentration (SIC) budget is well observed and synthesizes many important air–sea–ice interaction processes. However, it is rarely well simulated in Earth system models, and means to tune the former are not well understood. In this study, we investigate the sensitivity of 18 key NEMO4.0-SI 3 (Nucleus for European Modelling of the Ocean coupled with the Sea Ice Modelling Integrated Initiative) model parameters on modelled SIC and sea ice volume (SIV) budgets in the Southern Ocean based on a total of 449 model runs and two global sensitivity analysis methods. We found that the simulated SIC and SIV budgets are sensitive to ice strength, the thermal conductivity of snow, the number of ice categories, two parameters related to lateral melting, ice–ocean drag coefficient and air–ice drag coefficient. An optimized ice–ocean drag coefficient and air–ice drag coefficient can reduce the root-mean-square error between simulated and observed SIC budgets by about 10 %. This implies that a more accurate calculation of ice velocity is the key to optimizing the SIC budget simulation, which is unlikely to be achieved perfectly by simply tuning the model parameters in the presence of biased atmospheric forcing. Nevertheless, 10 combinations of NEMO4.0-SI 3 model parameters were recommended, as they could yield better sea ice extent and SIC budgets than when using the standard values. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Zenodo Geoscientific Model Development 16 4 1395 1425 |
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English |
description |
The seasonally dependent Antarctic sea ice concentration (SIC) budget is well observed and synthesizes many important air–sea–ice interaction processes. However, it is rarely well simulated in Earth system models, and means to tune the former are not well understood. In this study, we investigate the sensitivity of 18 key NEMO4.0-SI 3 (Nucleus for European Modelling of the Ocean coupled with the Sea Ice Modelling Integrated Initiative) model parameters on modelled SIC and sea ice volume (SIV) budgets in the Southern Ocean based on a total of 449 model runs and two global sensitivity analysis methods. We found that the simulated SIC and SIV budgets are sensitive to ice strength, the thermal conductivity of snow, the number of ice categories, two parameters related to lateral melting, ice–ocean drag coefficient and air–ice drag coefficient. An optimized ice–ocean drag coefficient and air–ice drag coefficient can reduce the root-mean-square error between simulated and observed SIC budgets by about 10 %. This implies that a more accurate calculation of ice velocity is the key to optimizing the SIC budget simulation, which is unlikely to be achieved perfectly by simply tuning the model parameters in the presence of biased atmospheric forcing. Nevertheless, 10 combinations of NEMO4.0-SI 3 model parameters were recommended, as they could yield better sea ice extent and SIC budgets than when using the standard values. |
format |
Article in Journal/Newspaper |
author |
Nie, Yafei Li, Chengkun Vancoppenolle, Martin Cheng, Bin Dias, Fabio Boeira Lv, Xianqing Uotila, Petteri |
spellingShingle |
Nie, Yafei Li, Chengkun Vancoppenolle, Martin Cheng, Bin Dias, Fabio Boeira Lv, Xianqing Uotila, Petteri Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
author_facet |
Nie, Yafei Li, Chengkun Vancoppenolle, Martin Cheng, Bin Dias, Fabio Boeira Lv, Xianqing Uotila, Petteri |
author_sort |
Nie, Yafei |
title |
Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
title_short |
Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
title_full |
Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
title_fullStr |
Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
title_full_unstemmed |
Sensitivity of NEMO4.0-SI3 model parameters on sea ice budgets in the Southern Ocean |
title_sort |
sensitivity of nemo4.0-si3 model parameters on sea ice budgets in the southern ocean |
publisher |
Zenodo |
publishDate |
2023 |
url |
https://doi.org/10.5194/gmd-16-1395-2023 |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
https://zenodo.org/communities/polarres https://zenodo.org/communities/eu https://doi.org/10.5194/gmd-16-1395-2023 oai:zenodo.org:8066136 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5194/gmd-16-1395-2023 |
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Geoscientific Model Development |
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16 |
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4 |
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1395 |
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1425 |
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1810289950430593024 |