Light absorption properties of brown carbon aerosol after coal to natural gas switch policy in China: a case study in winter PM<sub>2.5</sub> over Xi'an, northwestern China

Light absorption properties of brown carbon aerosol after coal to natural gas switch policy in China: a case study in winter PM_2.5 over Xi'an, northwestern China

Ting WANG¹, Dan Li¹, Yukun Chen² and Yueshe Wang², (1)Xi'an Jiaotong University, Xian, China, (2)Xi'an Jiaotong University, Xi'an, China