Composition and size distribution of wintertime inorganic aerosols at ground and alpine regions of northwest China

作     者：Haijiao Liu Qiao Feng Yu Huang Feng Wu Yali Liu Minxia Shen Xiao Guo Wenting Dai Weining Qi Yifan Zhang Lu Li Qiyuan Wang Bianhong Zhou Jianjun Li Haijiao Liu;Qiao Feng;Yu Huang;Feng Wu;Yali Liu;Minxia Shen;Xiao Guo;Wenting Dai;Weining Qi;Yifan Zhang;Lu Li;Qiyuan Wang;Bianhong Zhou;Jianjun Li

作者机构：State Key Laboratory of Loess and Quaternary GeologyKey Lab of Aerosol Chemistry and PhysicsInstitute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Xi'an Institute for Innovative Earth Environment ResearchXi'an 710061China College of Geography and EnvironmentBaoji University of Arts and SciencesShaanxi Key Laboratory of Disaster Monitoring and Mechanism SimulationBaoji 721013China National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong PlainShaanxiXi'an 710061China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第11期

页      面：238-242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 program from National Natural Science Foundation of China(Nos.42207555,41977332) Natural Science Basic Research Program of Shaanxi(Nos.2021JQ-971,2022JQ-242) Open Foundation of SKLLQG(No.SKLLQGZR2101) Strategic Priority Research Program of CAS(No.XDB40000000) the support of the Youth Innovation Promotion Association CAS(No.2020407) 

主　　题：Water-soluble inorganic ions Size distribution Aerosol acidity Ammonia Free troposphere 

摘      要：Water-soluble inorganic ions(WSIIs)play a pivotal role in atmospheric chemical reactions,particularly influencing the formation of secondary particulate matter.A comprehensive grasp of the vertical distribution of atmospheric pollutants holds immense significance in understanding the diffusion and transportation of these *** study investigates the WSIIs of PM_(2.5)and size-segregated particles at the top(~2060 m a.s.l.)and foot of *** during the winter of *** the measured ions present significant higher concentrations(1.9~6.9 times)at the foot than the ***^(-)and K^(+)at the foot are more than 4 times of those at the top,whereas Ca^(2+)and Mg^(2+)are only 1.3-1.9 times *** particle size distribution of NO_(3)^(-),SO_(4)^(2-),K^(+)and Cl^(-)demonstrate a single peak distribution(0.7-1.1μm)at the foot,but with a bimodal distribution(0.7-1.1μm and 4.7-5.8μm)at the *** differences suggest that the aerosol at the alpine region is mainly transported via long-distance from Northwest/North China,but limited influenced by vertical transport through valley *** changes of concentration and size distribution of WSIIs in dust event and non-dust period indicate that the effects of dust event on aerosols at ground surface were weaker than that of the free troposphere of Guanzhong ***,our study underscores the dominant influence of NO_(3)^(-)in shaping the gas-particle distribution of ammonia within the winter free *** results highlight the significant role of long-range transport on aerosols in the free troposphere in Guanzhong Plain,Northwest China.