Investigation of a haze-to-dust and dust swing process at a coastal city in northern China part I: Chemical composition and contributions of anthropogenic and natural sources

Wenqing Zhu, Yuxuan Qi, Huihui Tao, Haizhou Zhang, Wenshuai Li, Wenjun Qü, Jinhui Shi, Yingchen Liu, Lifang Sheng, Wencai Wang, Guanru Wu, Yunhui Zhao, Yanjing Zhang, Xiaohong Yao, Xinfeng Wang, Yi Li, Yingge Ma, Yang Zhou