Cause of an extreme warm and rainy winter in Shanghaiin 2019
Abstract An extreme warm winter (ranked first during the past 30‐years) occurred in Shanghai in 2019, accompanied with an extreme rainy winter (ranked thirdly in the same period). An observational diagnosis shows that the extreme warm and rainy winter arose from southerly anomalies associated with a...
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crwiley:10.1002/joc.7094 2024-06-02T08:11:08+00:00 Cause of an extreme warm and rainy winter in Shanghaiin 2019 Pan, Xiao Wang, Wei Li, Tim Xin, Fei Yu, Jinhua National Natural Science Foundation of China National Oceanic and Atmospheric Administration 2021 http://dx.doi.org/10.1002/joc.7094 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7094 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7094 https://rmets.onlinelibrary.wiley.com/doi/am-pdf/10.1002/joc.7094 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7094 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 41, issue 9, page 4684-4697 ISSN 0899-8418 1097-0088 journal-article 2021 crwiley https://doi.org/10.1002/joc.7094 2024-05-03T11:19:28Z Abstract An extreme warm winter (ranked first during the past 30‐years) occurred in Shanghai in 2019, accompanied with an extreme rainy winter (ranked thirdly in the same period). An observational diagnosis shows that the extreme warm and rainy winter arose from southerly anomalies associated with an anticyclone east of Shanghai. The cause of the anticyclone was attributed to V‐shaped upper‐tropospheric Rossby wave activity fluxes, originated from the North Atlantic and tropical Indian Ocean. Numerical model experiments indicate that the anomalous heat source in the tropical Indian Ocean played a dominant role (~65%) in causing the local anomalous circulation, while the heating in North Atlantic also played a role (~35%). A further analysis of the past 30 year data revealed that an extreme warm winter in the past did not coincide with an extreme wet winter. While the warm winter composite shows a large‐scale anticyclone anomaly over Central and East Asia, the rainy winter composite exhibits a circulation dipole pattern with an anomalous cyclone (anticyclone) west (east) of Shanghai. Numerical experiments confirm that the former was forced by the combined effect of precipitation anomalies over the North Atlantic and tropical Indian Ocean (IO) and Maritime Continent (MC) through Rossby wave energy dispersion, whereas the latter was caused by a dipole heating pattern over the tropical IO/MC sector. Article in Journal/Newspaper North Atlantic Wiley Online Library Indian International Journal of Climatology 41 9 4684 4697 |
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English |
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Abstract An extreme warm winter (ranked first during the past 30‐years) occurred in Shanghai in 2019, accompanied with an extreme rainy winter (ranked thirdly in the same period). An observational diagnosis shows that the extreme warm and rainy winter arose from southerly anomalies associated with an anticyclone east of Shanghai. The cause of the anticyclone was attributed to V‐shaped upper‐tropospheric Rossby wave activity fluxes, originated from the North Atlantic and tropical Indian Ocean. Numerical model experiments indicate that the anomalous heat source in the tropical Indian Ocean played a dominant role (~65%) in causing the local anomalous circulation, while the heating in North Atlantic also played a role (~35%). A further analysis of the past 30 year data revealed that an extreme warm winter in the past did not coincide with an extreme wet winter. While the warm winter composite shows a large‐scale anticyclone anomaly over Central and East Asia, the rainy winter composite exhibits a circulation dipole pattern with an anomalous cyclone (anticyclone) west (east) of Shanghai. Numerical experiments confirm that the former was forced by the combined effect of precipitation anomalies over the North Atlantic and tropical Indian Ocean (IO) and Maritime Continent (MC) through Rossby wave energy dispersion, whereas the latter was caused by a dipole heating pattern over the tropical IO/MC sector. |
author2 |
National Natural Science Foundation of China National Oceanic and Atmospheric Administration |
format |
Article in Journal/Newspaper |
author |
Pan, Xiao Wang, Wei Li, Tim Xin, Fei Yu, Jinhua |
spellingShingle |
Pan, Xiao Wang, Wei Li, Tim Xin, Fei Yu, Jinhua Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
author_facet |
Pan, Xiao Wang, Wei Li, Tim Xin, Fei Yu, Jinhua |
author_sort |
Pan, Xiao |
title |
Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
title_short |
Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
title_full |
Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
title_fullStr |
Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
title_full_unstemmed |
Cause of an extreme warm and rainy winter in Shanghaiin 2019 |
title_sort |
cause of an extreme warm and rainy winter in shanghaiin 2019 |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/joc.7094 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7094 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7094 https://rmets.onlinelibrary.wiley.com/doi/am-pdf/10.1002/joc.7094 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7094 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
International Journal of Climatology volume 41, issue 9, page 4684-4697 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.7094 |
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International Journal of Climatology |
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41 |
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9 |
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4684 |
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4697 |
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