大气科学学报2025，Vol.48Issue(6)：941-948,8.DOI:10.13878/j.cnki.dqkxxb.20241110001
2022年7月西欧热浪和中国长江流域高温干旱与青藏高原增暖的可能联系
Linkages between western European heatwaves and Yangtze River basin heatwaves and drought in July 2022 and unprecedented warming over the Qinghai-Xizang Plateau
摘要
Abstract
Global warming and associated climate change have intensified the frequency and severity of extreme summer events across the Northern Hemisphere,posing significant risks to human health and socioeconomic sys-tems.Increasingly,these events exhibit strong spatial connectivity,manifested as the concurrent concurrence of heatwaves,droughts,floods,and wildfires in distant regions.Understanding the interactions and forcing mecha-nisms behind such compound events is critical for improving prediction skill and informing climate risk manage-ment.This study investigates whether the simultaneous extreme heat events in western Europe and the Yangtze River basin in July 2022 were linked to the unprecedented warming over the Qinghai-Xizang Plateau during that summer.Using observational datasets,NCEP/NCAR analysis,and CPC precipitation data,we analyze the evo-lution of heatwave characteristics and associated circulation anomalies,with emphasis on the physical processes through which anomalous plateau warming modulated Rossby wave propagation.Results show that from 2 to 13 July 2022,the Qinghai-Xizang Plateau experienced extreme warming.Subsequently,from 14 to 25 July,the Yangtze River basin suffered its most severe heatwave-drought event since the founding of the People's Republic of China,while western Europe was simultaneously impacted by intense heatwaves.The analysis reveals that plateau warming induced a northward shift and strengthening of the southern branch of the midlatitude westerly jet.Superimposed upstream wave activity flux reinforced mid-high-latitude circulation anomalies,including an in-tensified and eastward-extending European ridge,a strengthened South Asian high,and an anomalous western Pacific subtropical high over eastern China.These anomalies jointly established an atmospheric teleconnection linking the two heat extremes.The findings highlight that extreme Qinghai-Xizang Plateau warming initiated a Rossby wave train that generated anticyclonic circulation anomalies over both Europe and the Yangtze River ba-sin,leading to their concurrent extreme heat events.Future studies could develop an index of plateau warming to test its statistical relationship with historical concurrent heat events across Eurasia.Moreover,the Yangtze River basin event in 2022 likely reflected the combined influence of multiple external forces,whose synergistic effects were not addressed here but warrant further investigation.关键词
青藏高原/西欧/长江流域/极端高温/罗斯贝波/西风急流Key words
Qinghai-Xizang Plateau/western Europe/Yangtze River basin/extreme heat/Rossby wave/westerly jet streams引用本文复制引用
王欣,段明铿,李菲..2022年7月西欧热浪和中国长江流域高温干旱与青藏高原增暖的可能联系[J].大气科学学报,2025,48(6):941-948,8.基金项目
第二次青藏高原综合科学考察研究项目(2024OZKK0301) （2024OZKK0301）
国家自然科学基金项目(42075030) （42075030）
山西省气象能力提升创新平台(中国气象局五台山云物理野外科学试验基地)基金项目(SXKYBYWLJD04) （中国气象局五台山云物理野外科学试验基地）
