Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp>
Abstract The relationship between improvements in the radiation bias over the Southern Ocean and the alleviation of the double‐intertropical convergence zone (ITCZ) problem in the actual updates of our climate models is investigated. The radiation bias in MRI‐CGCM3 that was used for CMIP5 simulation...
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crwiley:10.1002/asl.1064 2024-03-24T09:05:19+00:00 Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> Kawai, Hideaki Koshiro, Tsuyoshi Yukimoto, Seiji Environmental Restoration and Conservation Agency Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology 2021 http://dx.doi.org/10.1002/asl.1064 https://onlinelibrary.wiley.com/doi/pdf/10.1002/asl.1064 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/asl.1064 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl.1064 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Atmospheric Science Letters volume 22, issue 12 ISSN 1530-261X 1530-261X Atmospheric Science journal-article 2021 crwiley https://doi.org/10.1002/asl.1064 2024-02-28T02:10:20Z Abstract The relationship between improvements in the radiation bias over the Southern Ocean and the alleviation of the double‐intertropical convergence zone (ITCZ) problem in the actual updates of our climate models is investigated. The radiation bias in MRI‐CGCM3 that was used for CMIP5 simulations, particularly over the Southern Ocean, is significantly reduced in MRI‐ESM2 that is used for CMIP6 simulations. Each modification that contributed to the reduction of the radiation bias was progressively reverted to the corresponding older treatment in order to examine their individual impacts on the ITCZ representation. Results show the double‐ITCZ problem worsens almost monotonically when the excessive shortwave insolation over the Southern Ocean increases. The contribution of the atmosphere is about one third of the impact on the total northward energy transport and the corresponding response of the Hadley cell is related to the change in the double‐ITCZ. However, our results also imply that the ITCZ bias cannot be completely resolved by the improvements of radiative flux alone and that there are other causes of the problem. Article in Journal/Newspaper Southern Ocean Wiley Online Library Southern Ocean Atmospheric Science Letters |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Atmospheric Science |
spellingShingle |
Atmospheric Science Kawai, Hideaki Koshiro, Tsuyoshi Yukimoto, Seiji Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
topic_facet |
Atmospheric Science |
description |
Abstract The relationship between improvements in the radiation bias over the Southern Ocean and the alleviation of the double‐intertropical convergence zone (ITCZ) problem in the actual updates of our climate models is investigated. The radiation bias in MRI‐CGCM3 that was used for CMIP5 simulations, particularly over the Southern Ocean, is significantly reduced in MRI‐ESM2 that is used for CMIP6 simulations. Each modification that contributed to the reduction of the radiation bias was progressively reverted to the corresponding older treatment in order to examine their individual impacts on the ITCZ representation. Results show the double‐ITCZ problem worsens almost monotonically when the excessive shortwave insolation over the Southern Ocean increases. The contribution of the atmosphere is about one third of the impact on the total northward energy transport and the corresponding response of the Hadley cell is related to the change in the double‐ITCZ. However, our results also imply that the ITCZ bias cannot be completely resolved by the improvements of radiative flux alone and that there are other causes of the problem. |
author2 |
Environmental Restoration and Conservation Agency Japan Society for the Promotion of Science Ministry of Education, Culture, Sports, Science and Technology |
format |
Article in Journal/Newspaper |
author |
Kawai, Hideaki Koshiro, Tsuyoshi Yukimoto, Seiji |
author_facet |
Kawai, Hideaki Koshiro, Tsuyoshi Yukimoto, Seiji |
author_sort |
Kawai, Hideaki |
title |
Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
title_short |
Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
title_full |
Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
title_fullStr |
Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
title_full_unstemmed |
Relationship between shortwave radiation bias over the Southern Ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>MRI‐ESM2</scp> |
title_sort |
relationship between shortwave radiation bias over the southern ocean and the <scp>double‐</scp>intertropical convergence zone problem in <scp>mri‐esm2</scp> |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/asl.1064 https://onlinelibrary.wiley.com/doi/pdf/10.1002/asl.1064 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/asl.1064 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/asl.1064 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Atmospheric Science Letters volume 22, issue 12 ISSN 1530-261X 1530-261X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/asl.1064 |
container_title |
Atmospheric Science Letters |
_version_ |
1794406883063234560 |