Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021
Understanding intra-seasonal variation in extreme cold events (ECEs) has important implications for climate prediction and climate adaptation. However, the ECEs difference between early (from December 1 to January 15) and late (from January 16 to February 28) winters is a lack of sufficient understa...
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Online Access: | http://dx.doi.org/10.3389/fenvs.2022.923228 https://www.frontiersin.org/articles/10.3389/fenvs.2022.923228/full |
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crfrontiers:10.3389/fenvs.2022.923228 2024-02-11T10:01:11+01:00 Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 Dong, Wei Zhao, Liang Cheng, Wei Guo, Chunyan Shen, Xinyong Yao, Haoxin National Natural Science Foundation of China National Key Research and Development Program of China 2022 http://dx.doi.org/10.3389/fenvs.2022.923228 https://www.frontiersin.org/articles/10.3389/fenvs.2022.923228/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Environmental Science volume 10 ISSN 2296-665X General Environmental Science journal-article 2022 crfrontiers https://doi.org/10.3389/fenvs.2022.923228 2024-01-26T09:57:19Z Understanding intra-seasonal variation in extreme cold events (ECEs) has important implications for climate prediction and climate adaptation. However, the ECEs difference between early (from December 1 to January 15) and late (from January 16 to February 28) winters is a lack of sufficient understanding. Herein, we investigated the trends of ECEs over eastern China in early and late winters. Results showed that the number of days with ECEs had a faster and uniformly decreasing trend in late winter over eastern China, whereas the decreasing trend in early winter was not significant because of the dipole pattern with an increase of ECEs in northeast China and a decrease of ECEs in southeast China during the time period 1980–2021. This denoted that China was presenting a pattern of “cold early winter–warm late winter”. The feature of cold early winter was related to a significant increase in high-latitude blocking highs extending poleward and reaching the Arctic Circle in early winter during the last 20 years. In particular, there was a large-scale tilted high ridge from the Ural Mountains to northern Asia, which favored the negative phase of the Arctic oscillation. This, in turn, led to a strong Siberian high and East Asian winter monsoon. Strong cold advection related to the circulation anomalies caused an ECEs increase in northeast China and dominated the change in temperature over eastern China in early winter. By contrast, the decrease in ECEs in late winter in the last 20 years was more related to the interdecadal enhancement of the anticyclonic anomaly over the north Pacific (NPAC). The strong NPAC extended to East Asia in a zonal direction, causing strong warm anomalies in eastern China through warm advection and diabatic heating, which weakened the northerly and prevented the East Asian trough from moving south, resulting in a warmer East Asia and a uniform decrease in late winter. Article in Journal/Newspaper Arctic ural mountains Frontiers (Publisher) Arctic Pacific Frontiers in Environmental Science 10 |
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General Environmental Science |
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General Environmental Science Dong, Wei Zhao, Liang Cheng, Wei Guo, Chunyan Shen, Xinyong Yao, Haoxin Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
topic_facet |
General Environmental Science |
description |
Understanding intra-seasonal variation in extreme cold events (ECEs) has important implications for climate prediction and climate adaptation. However, the ECEs difference between early (from December 1 to January 15) and late (from January 16 to February 28) winters is a lack of sufficient understanding. Herein, we investigated the trends of ECEs over eastern China in early and late winters. Results showed that the number of days with ECEs had a faster and uniformly decreasing trend in late winter over eastern China, whereas the decreasing trend in early winter was not significant because of the dipole pattern with an increase of ECEs in northeast China and a decrease of ECEs in southeast China during the time period 1980–2021. This denoted that China was presenting a pattern of “cold early winter–warm late winter”. The feature of cold early winter was related to a significant increase in high-latitude blocking highs extending poleward and reaching the Arctic Circle in early winter during the last 20 years. In particular, there was a large-scale tilted high ridge from the Ural Mountains to northern Asia, which favored the negative phase of the Arctic oscillation. This, in turn, led to a strong Siberian high and East Asian winter monsoon. Strong cold advection related to the circulation anomalies caused an ECEs increase in northeast China and dominated the change in temperature over eastern China in early winter. By contrast, the decrease in ECEs in late winter in the last 20 years was more related to the interdecadal enhancement of the anticyclonic anomaly over the north Pacific (NPAC). The strong NPAC extended to East Asia in a zonal direction, causing strong warm anomalies in eastern China through warm advection and diabatic heating, which weakened the northerly and prevented the East Asian trough from moving south, resulting in a warmer East Asia and a uniform decrease in late winter. |
author2 |
National Natural Science Foundation of China National Key Research and Development Program of China |
format |
Article in Journal/Newspaper |
author |
Dong, Wei Zhao, Liang Cheng, Wei Guo, Chunyan Shen, Xinyong Yao, Haoxin |
author_facet |
Dong, Wei Zhao, Liang Cheng, Wei Guo, Chunyan Shen, Xinyong Yao, Haoxin |
author_sort |
Dong, Wei |
title |
Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
title_short |
Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
title_full |
Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
title_fullStr |
Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
title_full_unstemmed |
Inconsistent trends between early and late winters in extreme cold events in China from 1980 to 2021 |
title_sort |
inconsistent trends between early and late winters in extreme cold events in china from 1980 to 2021 |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fenvs.2022.923228 https://www.frontiersin.org/articles/10.3389/fenvs.2022.923228/full |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic ural mountains |
genre_facet |
Arctic ural mountains |
op_source |
Frontiers in Environmental Science volume 10 ISSN 2296-665X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fenvs.2022.923228 |
container_title |
Frontiers in Environmental Science |
container_volume |
10 |
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1790596935273414656 |