Linkage Between European and East Asian Heatwaves on Synoptic Scales

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外文摘要：Concurrent extreme weather events in geographically distant areas potentially cause high-end risks for societies.By using network analysis,the present study managed to identify significant nearly-simultaneous occurrences of heatwaves between the grid cells in East Asia and Eastern Europe,even though they are geographically far away from each other.By further composite analysis,this study revealed that hot events first occurred in Eastern Europe,typically with a time lag of 3-4 days before the East Asian heatwave events.An eastward propagating atmospheric wave train,known as the circum-global teleconnection(CGT)pattern,bridged the sequent occurrences of extreme events in these two remote regions.Atmospheric blockings,amplified by surface warming over Eastern Europe,not only enhanced local heat extremes but also excited a CGT-like pattern characterized by alternative anomalies of high and low pressures.Subsequent downstream anticyclones in the middle and upper troposphere reduced local cloud cover and increased downward solar radiation,thereby facilitating the formation of heatwaves over East Asia.Nearly half of East Asian heatwave events were preceded by Eastern European heatwave events in the 10-day time range before East Asian heatwave events.This investigation of heatwave teleconnection in the two distant regions exhibits strong potential to improve the prediction accuracy of East Asian heatwaves.

外文关键词：

concurrent heatwavesEastern EuropeEast Asiacircum-global teleconnection pattern

作者：

蔡奋颖、刘彩红、杨崧、邓开强、KURTHS Jürgen

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作者单位：

School of Atmospheric Sciences,Sun Yat-sen University,and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai,Guangdong 519082 China

Department of Complexity Science,Potsdam Institute for Climate Impact Research(PIK),Member of the Leibniz Association,Potsdam 14473 Germany

Department of Water and Climate Risk,Institute for Environmental Studies,Vrije Universiteit Amsterdam,Amsterdam 1087HV Netherlands

Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,Sun Yat-sen University,Zhuhai,Guangdong 519082 China

Department of Physics,Humboldt-Universität zu Berlin,Berlin 12489 Germany

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基金：

Guangdong Major Project of Basic and Applied Basic ResearchNational Natural Science Foundation of ChinaInnovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies

项目编号：

2020B0301030004422750203110210012020B1212060025

出版年：

2024

DOI：

10.3724/j.1006-8775.2024.010

热带气象学报(英文版)

中国气象局广州热带海洋气象研究所

热带气象学报(英文版)

影响因子：0.169

ISSN：1006-8775

年,卷(期)：2024.30(2)