Unprecedented Heatwave in Western North America during Late June of 2021: Roles of Atmospheric Circulation and Global Warming  

作　　者：Chunzai WANG Jiayu ZHENG Wei LIN Yuqing WANG 

机构地区：[1]Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China [2]State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China [3]Innovation Academy of South China Sea Ecology and Environmental Engineering,Chinese Academy of Sciences,Guangzhou 510301,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Advances in Atmospheric Sciences》2023年第1期14-28,共15页大气科学进展（英文版）

基　　金：supported by the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0306);National Natural Science Foundation of China (Grant Nos. 41731173 and 42192564);National Key R&D Program of China (2019YFA0606701);Strategic Priority Research Program of Chinese Academy of Sciences (XDB42000000 and XDA20060502);Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences (ISEE2021ZD01);Independent Research Project Program of State Key Laboratory of Tropical Oceanography (Grand No. LTOZZ2004);Leading Talents of Guangdong Province Program;supported by the High Performance Computing Division in the South China Sea Institute of Oceanology

摘　　要：An extraordinary and unprecedented heatwave swept across western North America(i.e.,the Pacific Northwest)in late June of 2021,resulting in hundreds of deaths,a massive die-off of sea creatures off the coast,and horrific wildfires.Here,we use observational data to find the atmospheric circulation variabilities of the North Pacific and Arctic-Pacific-Canada patterns that co-occurred with the development and mature phases of the heatwave,as well as the North America pattern,which coincided with the decaying and eastward movement of the heatwave.Climate models from the Coupled Model Intercomparison Project(Phase 6)are not designed to simulate a particular heatwave event like this one.Still,models show that greenhouse gases are the main reason for the long-term increase of average daily maximum temperature in western North America in the past and future.

关 键 词：HEATWAVE climate change atmospheric circulation pattern Pacific Northwest 

分 类 号：P467[天文地球—大气科学及气象学]