Local and regional contributions to fine particulate matter in Beijing during heavy haze episodes

Yangjun Wang, Shengwei Bao, Shuxiao Wang, Yongtao Hu, Xiang Shi, Jiandong Wang Bin Zhao, Jingkun Jiang, Mei Zheng, Minghong Wu, Armistead G. Russell, Yuhang Wang, Jiming Hao, Science of The Total Environment