Contrast in Secondary Organic Aerosols between the Present Day and the Preindustrial Period:The Importance of Nontraditional Sources and the Changed Atmospheric Oxidation Capability  

作　　者：Yingchuan YANG Wenyi YANG Xueshun CHEN Jiawen ZHU Huansheng CHEN Yuanlin WANG Wending WANG Lianfang WEI Ying WEI Qian YE Huiyun DU Zichen WU Zhe WANG Jie LI Xiaodong ZENG Zifa WANG 

机构地区：[1]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [2]International Center for Climate and Environment Sciences,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [3]Chinese Academy of Environmental Planning,Beijing 100041,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Institute of Urban Meteorology,China Meteorology Administration,Beijing 100089,China [6]Unit 93213 of PLA,Beijing 100085,China

出　　处：《Advances in Atmospheric Sciences》2024年第10期1936-1952,I0002-I0010,共26页大气科学进展（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2020YFA0607801);the National Natural Science Foundation of China(Grant Nos.42007199 and 42377105);the National Key Scientific and Technological Infrastructure project“Earth System Science Numerical Simulator Facility”.

摘　　要：Quantifying differences in secondary organic aerosols(SOAs)between the preindustrial period and the present day is crucial to assess climate forcing and environmental effects resulting from anthropogenic activities.The lack of vegetation information for the preindustrial period and the uncertainties in describing SOA formation are two leading factors preventing simulation of SOA.This study calculated the online emissions of biogenic volatile organic compounds(VOCs)in the Aerosol and Atmospheric Chemistry Model of the Institute of Atmospheric Physics(IAP-AACM)by coupling the Model of Emissions of Gases and Aerosols from Nature(MEGAN),where the input vegetation parameters were simulated by the IAP Dynamic Global Vegetation Model(IAP-DGVM).The volatility basis set(VBS)approach was adopted to simulate SOA formation from the nontraditional pathways,i.e.,the oxidation of intermediate VOCs and aging of primary organic aerosol.Although biogenic SOAs(BSOAs)were dominant in SOAs globally in the preindustrial period,the contribution of nontraditional anthropogenic SOAs(ASOAs)to the total SOAs was up to 35.7%.In the present day,the contribution of ASOAs was 2.8 times larger than that in the preindustrial period.The contribution of nontraditional sources of SOAs to SOA was as high as 53.1%.The influence of increased anthropogenic emissions in the present day on BSOA concentrations was greater than that of increased biogenic emission changes.The response of BSOA concentrations to anthropogenic emission changes in the present day was more sensitive than that in the preindustrial period.The nontraditional sources and the atmospheric oxidation capability greatly affect the global SOA change.

关 键 词：IAP-AACM VBS MEGAN secondary organic aerosol anthropogenic and biogenic emissions 

分 类 号：X513[环境科学与工程—环境工程]