supported by the National Natural Science Foundation of China (Grant Nos. 41571130032 & 41571130035);the National Key R & D Program (Grant No. 2016YFC0201506);supported by the MAIA science team at the JPL, California Institute of Technology (Grant No. 1588347)
China promulgated the Air Pollution Prevention and Control Action Plan(the Action Plan)in 2013 and developed stringent control measures to mitigate fine particulate matter(PM2.5) pollution.Here,we investigated the PM2...