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Fluorescence Properties and Chemical Composition of fine Particles in the Background Atmosphere of North China

Advances in Atmospheric Sciences 2023年第7期40卷 1159-1174页

作者： Ping LI Siyao YUE Xiaoyang YANG Di LIU Qiang ZHANG Wei HU Shengjie HOU Wanyu ZHAO Hong REN Gang LI Yuanguan GAO Junjun DENG Qiaorong XIE Yele SUN Zifa WANG Pingqing FU State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China University of Chinese Academy of Sciences Beijing 100049China

To understand the aerosol characteristics in a regional background environment,fine-particle(PM_(2.5),n=228)samples were collected over a one-year period at the Shangdianzi(SDZ)station,which is a Global Atmospheric Watch regional background station in North *** chemical and optical characteristics of PM_(2.5)were analyzed,including organic carbon,elemental carbon,water-soluble organic carbon,water-soluble inorganic ions,and fluorescent components of watersoluble organic *** source factors of major aerosol components are apportioned,and the sources of the fluorescent chromophores are further *** major chemical components of PM_(2.5)at SDZ were NO_(3)^(-),organic matter,SO_(4)^(2-),and NH_(4)^(+).Annually,water-soluble organic carbon contributed 48%±15%to the total organic *** formation(52%)and fossil fuel combustion(63%)are the largest sources of water-soluble organic matter and water-insoluble organic matter,*** addition,three humic-like and one protein-like matter were identified via parallel factor analysis for excitation–emission *** fluorescence intensities of the components were highest in winter and lowest in summer,indicating the main impact of burning *** study contributes to understanding the chemical and optical characteristics of ambient aerosols in the background atmosphere.

关键词： fine aerosols excitation-emission matrix fluorescence properties primary biological aerosols Shangdianzi

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