Insights into multidimensional transport flux from vertical observation and numerical simulation in two cities in North China

作     者：Zhida Zhang Xiaoqi Wang Shuiyuan Cheng Guiqian Tang Yibin Fu Zhida Zhang;Xiaoqi Wang;Shuiyuan Cheng;Guiqian Tang;Yibin Fu

作者机构：Key Laboratory of Beijing on Regional Air Pollution ControlBeijing University of TechnologyBeijing 100124China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC)Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Environmental Optics and TechnologyAnhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第125卷第3期

页      面：831-842页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 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 National Key Research and Development Program of China (No.2018YFC0213206) the National Natural Science Foundation of China (Nos. 52000005, 51638001) 

主　　题：Transport flux Horizontal transport Vertical exchange Atmospheric boundary layer Free troposphere Pollutant budget relationship 

摘      要：This study represents the first quantitative evaluation of pollution transport budget within the boundary layer of typical cities in the Beijing-Tianjin-Hebei (BTH) region from the perspective of horizontal and vertical exchanges and further discusses the impact of the atmospheric boundary layer (ABL)-free troposphere (FT) exchange on concentration of fine particulate matter (PM_(2.5)) within the ABL during heavy *** the perspective of the transport flux balance relationship,differences in pollution transport characteristics between the two cities is mainly reflected in the ABL-FT exchange *** FT mainly flowed into the ABL in BJ,while in SJZ,the outflow from the ABL to the FT was more *** with an analysis of vertical wind profile distribution,BJ was found to be more susceptible to the influence of northwest cold high prevailing in winter,while sinking of strong cold air allowed the FT flowing into the ABL influence the vertical exchange over *** addition,we selected a typical pollution event for targeted analysis to understand mechanistic details of the influence of ABL-FT exchange on the pollution *** results showed that ABL-FT interaction played an important role in PM_(2.5)concentration within the ABL during heavy *** in the early stage of heavy pollution,FT transport contributed as much as 82.74% of PM_(2.5)within the *** findings are significant for improving our understanding of pollution transport characteristics within the boundary layer and the effect of ABL-FT exchange on air quality.