Seasonal variations in the sources of organic aerosol in Xi'an, Northwest China: The importance of biomass burning and secondary formation

Haobin Zhong, Ru‐Jin Huang, Jing Duan, Chunshui Lin, Yifang Gu, Ying Wang, Yongjie Li, Yan Zheng, Qi Chen, Yang Chen, Wenting Dai, Haiyan Ni, Yunhua Chang, Douglas R. Worsnop, Wei Xu, Jurgita Ovadnevaitė, Darius Čeburnis, Colin O’Dowd