Modeling study of PM2.5 concentration change in Beijing-Tianjin-Hebei and Chengdu-Chongqing urban clusters

Yuanlin Wang1, Huansheng Chen2, Qizhong Wu3 and Zifa Wang1, (1)Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, (2)LAPC, LAPC, Beijing, China, (3)Beijing Normal University, Beijing, China