Impact of Gobi desert dust on aerosol chemistry of Xi'an, inland China during spring 2009: differences in composition and size distribution between the urban ground surface and the mountain atmosphere
G. H. Wang, B. H. Zhou, C. L. Cheng, J. J. Cao, J. J. Meng, J. J. Li, J. Tao, R. J. Zhang, and P. Q. Fu