Sensitivity of warm-sector heavy precipitation to the impact of anthropogenic heating in South China

作     者：LI Shu-Wen YANG Shuai LIU Hai-Wen LI Shu-Wen;YANG Shuai;LIU Hai-Wen

作者机构：School of Atmospheric SciencesChengdu University of Information Technology Laboratory of Cloud-PrecipitationPhysics and Severe Storms (LACS)Institute of Atmospheric PhysicsChinese Academy of Sciences Department of Aviation MeteorologyCivil Aviation University of China 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2018年第11卷第3期

页      面：236-245页

核心收录：

学科分类：07[理学] 08[工学] 070602[理学-大气物理学与大气环境] 0815[工学-水利工程] 0706[理学-大气科学] 

基　　金：supported by the Special Scientific Research Fund of the Meteorological Public Welfare of the Ministry of Sciences and Technology,China(Grant No.GYHY201406003) the National Natural Science Foundation of China(Grant Nos.41375054,41575064,and 41375052) the Applied Basic Research Programs of the Science and Technology Department of Sichuan Province(Grant No.2015JY0109) the Starting Foundation of Civil Aviation University of China(Grant No.2016QD05X) 

主　　题：Heavy precipitation anthropogenic heating numerical simulation 

摘      要：Previous studies have mostly focused on the effect of anthropogenic heating（AH） on air pollution events. However, few studies have investigated the impact of AH on the warm-sector precipitation over South China. By using the Weather Research and Forecasting model（WRF）coupled with an urban canopy model with appropriate AH release values, the warm-sector heavy rainfall event that occurred over the Pearl River Delta（PRD） during 8 May 2014 was *** results show that the warm-sector precipitation of the PRD is sensitive to the impact of *** affecting the convection in the initiation of precipitation, AH can reduce the total precipitation of urban areas by approximately 10%. The possible mechanism by which AH influences the warm-sector heavy precipitation is described as follows： AH induced local convergence shifts towards the border of the PRD and intensified the convection and precipitation therein, by rearranging the thermal distributions of the flow field. In addition, AH changed the local convergence within the urban PRD areas, which was weakened by the homogenous urban thermal environment, and thereby decreased the total urban precipitation.