State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
Center for Excellence in Regional Atmospheric Environment, Institute
of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Danhui Xu
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
National Center for Climate Change Strategy and International Cooperation, Ministry of Ecology and Environment, Beijing 100035, China
Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United
Kingdom
Xuefeng Yao
PLA 96941 Army, Beijing 102206, China
Junhua Wang
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
University of Chinese Academy of Sciences, Beijing 100049, China
Xueshun Chen
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
Qixin Tan
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP),
Chinese Academy of Sciences (CAS), Beijing 100029, China
University of Chinese Academy of Sciences, Beijing 100049, China
Center for Excellence in Regional Atmospheric Environment, Institute
of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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In this study, an improved sequential sampling method is developed and implemented to estimate the contribution of below-cloud and in-cloud wet deposition over four years of measurements in Beijing. We find that the contribution of below-cloud scavenging for Ca2+, SO42–, and NH4+ decreases from above 50 % in 2014 to below 40 % in 2017. This suggests that the Action Plan has mitigated particulate matter pollution in the surface layer and hence decreased scavenging due to the washout process.
In this study, an improved sequential sampling method is developed and implemented to estimate...
