The recent increasing frequency of strong cooling event in Southwest China in February
Abstract A strong cooling event refers to a sharp change in the average temperature over a short period. The rapid change of temperature has important effect on human health and is highly concerned recent years. Based on the observed temperature data set from stations in Southwest China (SWC) from 1...
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crwiley:10.1002/joc.8550 2024-10-06T13:47:35+00:00 The recent increasing frequency of strong cooling event in Southwest China in February Chang, Sun Zi‐Niu, Xiao National Natural Science Foundation of China 2024 http://dx.doi.org/10.1002/joc.8550 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8550 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 44, issue 11, page 3778-3791 ISSN 0899-8418 1097-0088 journal-article 2024 crwiley https://doi.org/10.1002/joc.8550 2024-09-11T04:12:26Z Abstract A strong cooling event refers to a sharp change in the average temperature over a short period. The rapid change of temperature has important effect on human health and is highly concerned recent years. Based on the observed temperature data set from stations in Southwest China (SWC) from 1979 to 2017, this paper analyses the characteristics of the strong cooling event (SCE). The result shows that SCE occurs with the highest frequency during the time from February to May. Among them, the frequency of SCE in February exhibits an abrupt change before and after 2005 with a significant increase. Further study reveals that the change of SCE frequency in February is associated with the large‐scale background circulation patterns. After 2005, there is a cyclonic circulation anomaly in Northeast Asia and an anticyclonic circulation anomaly in the Tibet Plateau (TP). This pattern provides a favourable condition for the southward movement of cold air mass, thereby increasing the frequency of SCE in SWC. Furthermore, it is revealed that there is a strong correlation between the variation of SCE frequency in February and sea surface temperatures (SST) in the Northwest Pacific in January before 2005. The cold SST anomaly could favour the occurrence of extreme TD events in SWC through vertical circulation. After 2005, the correlation between SCE and Northwest Pacific SST is not significant. The sea ice in the northern Barents Sea and Kara Sea becomes the dominant impact factor. The abnormally low sea ice concentration is conducive to strengthen the meridional circulation over East Asia, leading to an increasing frequency of SCE in SWC. Article in Journal/Newspaper Barents Sea Kara Sea Sea ice Wiley Online Library Barents Sea Kara Sea Pacific International Journal of Climatology 44 11 3778 3791 |
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Wiley Online Library |
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English |
description |
Abstract A strong cooling event refers to a sharp change in the average temperature over a short period. The rapid change of temperature has important effect on human health and is highly concerned recent years. Based on the observed temperature data set from stations in Southwest China (SWC) from 1979 to 2017, this paper analyses the characteristics of the strong cooling event (SCE). The result shows that SCE occurs with the highest frequency during the time from February to May. Among them, the frequency of SCE in February exhibits an abrupt change before and after 2005 with a significant increase. Further study reveals that the change of SCE frequency in February is associated with the large‐scale background circulation patterns. After 2005, there is a cyclonic circulation anomaly in Northeast Asia and an anticyclonic circulation anomaly in the Tibet Plateau (TP). This pattern provides a favourable condition for the southward movement of cold air mass, thereby increasing the frequency of SCE in SWC. Furthermore, it is revealed that there is a strong correlation between the variation of SCE frequency in February and sea surface temperatures (SST) in the Northwest Pacific in January before 2005. The cold SST anomaly could favour the occurrence of extreme TD events in SWC through vertical circulation. After 2005, the correlation between SCE and Northwest Pacific SST is not significant. The sea ice in the northern Barents Sea and Kara Sea becomes the dominant impact factor. The abnormally low sea ice concentration is conducive to strengthen the meridional circulation over East Asia, leading to an increasing frequency of SCE in SWC. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Chang, Sun Zi‐Niu, Xiao |
spellingShingle |
Chang, Sun Zi‐Niu, Xiao The recent increasing frequency of strong cooling event in Southwest China in February |
author_facet |
Chang, Sun Zi‐Niu, Xiao |
author_sort |
Chang, Sun |
title |
The recent increasing frequency of strong cooling event in Southwest China in February |
title_short |
The recent increasing frequency of strong cooling event in Southwest China in February |
title_full |
The recent increasing frequency of strong cooling event in Southwest China in February |
title_fullStr |
The recent increasing frequency of strong cooling event in Southwest China in February |
title_full_unstemmed |
The recent increasing frequency of strong cooling event in Southwest China in February |
title_sort |
recent increasing frequency of strong cooling event in southwest china in february |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/joc.8550 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.8550 |
geographic |
Barents Sea Kara Sea Pacific |
geographic_facet |
Barents Sea Kara Sea Pacific |
genre |
Barents Sea Kara Sea Sea ice |
genre_facet |
Barents Sea Kara Sea Sea ice |
op_source |
International Journal of Climatology volume 44, issue 11, page 3778-3791 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.8550 |
container_title |
International Journal of Climatology |
container_volume |
44 |
container_issue |
11 |
container_start_page |
3778 |
op_container_end_page |
3791 |
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1812175776629391360 |