Occurrence levels of and effects of air pollution control measures on carbonaceous aerosols in fine particulate matter in the Beijing-Tianjin-Hebei region of China: Insights gained from long-term measurement

Dongsheng Ji1, Willy Maenhaut2, Jun He3, Lili Wang1, Jinyuan Xin1, Bo Hu1, Yang Sun1 and Yuesi Wang1, (1)Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, (2)Ghent Univ, Gent, Belgium, (3)University of Nottingham Ningbo China, Chemical and Environmental Engineering, Ningbo, China