Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability
Abstract Utilizing ERA5 data, this study provides evidence that both the winter-mean state and subseasonal variability (SSV) of the warm Arctic-cold Eurasia (WACE) pattern significantly influence the frequency of cold extremes in Eurasia. The positive phase of winter-mean WACE (WACE Mean ) or a stro...
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Online Access: | http://dx.doi.org/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf/pdf |
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crioppubl:10.1088/1748-9326/ad2caf 2024-06-02T08:01:54+00:00 Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability Wang, Sai Ding, Minghu Li, Guancheng Chen, Wen Basic Research Fund of CAMS National Natural Science Foundation of China 2024 http://dx.doi.org/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 19, issue 3, page 034043 ISSN 1748-9326 journal-article 2024 crioppubl https://doi.org/10.1088/1748-9326/ad2caf 2024-05-07T13:58:31Z Abstract Utilizing ERA5 data, this study provides evidence that both the winter-mean state and subseasonal variability (SSV) of the warm Arctic-cold Eurasia (WACE) pattern significantly influence the frequency of cold extremes in Eurasia. The positive phase of winter-mean WACE (WACE Mean ) or a stronger SSV of WACE (WACE SSV ) corresponds to a higher occurrence of cold extremes over central Eurasia and East Asia. Furthermore, the study reveals that the impact of WACE Mean on the cold extremes is modulated by WACE SSV . During years characterized by a positive WACE Mean and enhanced WACE SSV , the associated winter-mean anticyclonic anomalies, combined with amplified subseasonal circulation fluctuations over the northern Eurasia continent, contribute to a significant increase in the blocking frequency over the Ural–Siberia region. This, in turn, contributes to an intensified occurrence of cold extremes in central Eurasia and East Asia. In contrast, during the years with a positive WACE Mean but reduced WACE SSV , in the absence of significant changes in the subseasonal circulation fluctuations, the winter-mean anticyclonic anomalies over the northern Eurasia continent do not exert a significant impact on Ural–Siberian blocking frequency by themselves. Consequently, there are no notable anomalies in the frequency of cold extremes over central Eurasia and East Asia. Finally, this study reveals that the differences in the distribution of the frequency anomalies in the blocking between the two sets of years are attributed to the constructive and destructive superposition of anomalies in subseasonal circulation fluctuations related to the WACE Mean and WACE SSV . Article in Journal/Newspaper Arctic Siberia IOP Publishing Arctic Environmental Research Letters 19 3 034043 |
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Abstract Utilizing ERA5 data, this study provides evidence that both the winter-mean state and subseasonal variability (SSV) of the warm Arctic-cold Eurasia (WACE) pattern significantly influence the frequency of cold extremes in Eurasia. The positive phase of winter-mean WACE (WACE Mean ) or a stronger SSV of WACE (WACE SSV ) corresponds to a higher occurrence of cold extremes over central Eurasia and East Asia. Furthermore, the study reveals that the impact of WACE Mean on the cold extremes is modulated by WACE SSV . During years characterized by a positive WACE Mean and enhanced WACE SSV , the associated winter-mean anticyclonic anomalies, combined with amplified subseasonal circulation fluctuations over the northern Eurasia continent, contribute to a significant increase in the blocking frequency over the Ural–Siberia region. This, in turn, contributes to an intensified occurrence of cold extremes in central Eurasia and East Asia. In contrast, during the years with a positive WACE Mean but reduced WACE SSV , in the absence of significant changes in the subseasonal circulation fluctuations, the winter-mean anticyclonic anomalies over the northern Eurasia continent do not exert a significant impact on Ural–Siberian blocking frequency by themselves. Consequently, there are no notable anomalies in the frequency of cold extremes over central Eurasia and East Asia. Finally, this study reveals that the differences in the distribution of the frequency anomalies in the blocking between the two sets of years are attributed to the constructive and destructive superposition of anomalies in subseasonal circulation fluctuations related to the WACE Mean and WACE SSV . |
author2 |
Basic Research Fund of CAMS National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Wang, Sai Ding, Minghu Li, Guancheng Chen, Wen |
spellingShingle |
Wang, Sai Ding, Minghu Li, Guancheng Chen, Wen Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
author_facet |
Wang, Sai Ding, Minghu Li, Guancheng Chen, Wen |
author_sort |
Wang, Sai |
title |
Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
title_short |
Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
title_full |
Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
title_fullStr |
Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
title_full_unstemmed |
Modulation of the impact of winter-mean warm Arctic-cold Eurasia pattern on Eurasian cold extremes by the subseasonal variability |
title_sort |
modulation of the impact of winter-mean warm arctic-cold eurasia pattern on eurasian cold extremes by the subseasonal variability |
publisher |
IOP Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf https://iopscience.iop.org/article/10.1088/1748-9326/ad2caf/pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_source |
Environmental Research Letters volume 19, issue 3, page 034043 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ad2caf |
container_title |
Environmental Research Letters |
container_volume |
19 |
container_issue |
3 |
container_start_page |
034043 |
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1800746392073797632 |