Three-Dimensional Urban Thermal Effect across a Large City Cluster during an Extreme Heat Wave:Observational Analysis

作     者：Yue MA Ping LIANG Sue GRIMMOND Xuchao YANG Jun LYU Yihui DING Yue MA;Ping LIANG;Sue GRIMMOND;Xuchao YANG;Jun LYU;Yihui DING

作者机构：Key Laboratory of Cities’Mitigation and Adaptation to Climate Change in ShanghaiShanghai Regional Climate CenterChina Meteorological AdministrationShanghai 200030China Shanghai Jiading District Meteorological BureauShanghai 201800China Department of MeteorologyUniversity of ReadingReading RG66ETUnited Kingdom Ocean CollegeZhejiang UniversityZhoushan 316021China Jiangsu Meteorological Information CenterJiangsu Meteorological BureauNanjing 210008China National Climate CenterChina Meteorological AdministrationBeijing 100081China 

出 版 物：《Journal of Meteorological Research》 (气象学报（英文版）)

年 卷 期：2022年第36卷第3期

页      面：387-400页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：Supported by the Guangdong Major Project of Basic and Applied Basic Research(2020B0301030004) National Natural Science Foundation of China(42175056,41790471) Natural Science Foundation of Shanghai(21ZR1457600) China Meteorological Administration Innovation and Development Project(CXFZ2022J009) UK-China Research and Innovation Partnership Fund through the Met Office Climate Science for Service Partnership(CSSP)China as part of the Newton Fund. 

主　　题：urban thermal effect three-dimensional Yangtze River Delta heat wave 

摘      要：Given extensive and rapid urbanization globally,assessing regional urban thermal effects(UTE)in both canopy and boundary layers under extreme weather/climate conditions is of significant interest.Rapid population and economic growth in the Yangtze River Delta(YRD)have made it one of the largest city clusters in China.Here,we explore the three-dimensional(3D)UTE in the YRD using multi-source observations from high-resolution automatic weather stations,radiosondes,and eddy covariance sensors during the record-setting heat wave(HW)of July-August 2013.It is found that the regional canopy layer UTE is up to 0.6-1.2℃,and the nocturnal UTE(0.7-1.6℃)is larger than daytime UTE(0.2-0.5℃)during the HW.The regional canopy layer UTE is enhanced and expanded northwards,with some rural sites contaminated by the urban influences,especially at night.In the boundary layer,the strengthened regional UTE extends vertically to at least 925 hPa(~750 m)during this HW.The strengthened 3D UTE in the YRD is associated with an enlarged Bowen ratio difference between urban and non-urban areas.These findings about the 3D UTE are beneficial for better understanding of the thermal environment of large city clusters under HW and for more appropriate adaption and mitigation strategies.