State Key Laboratory of Loess and Quaternary Geology,Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application,Xi'an AMS Center,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;
Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;
Department of Environmental Engineering,Technical University of Denmark,RisøCampus,Roskilde 4000,Denmark;
Xi'an Institute for Innovative Earth Environment Research,Xi'an 710061,China;
CAS Center for Excellence in Quaternary Science and Global Change,Xi'an 710061,China;
Open Studio for Oceanic-Continental Climate and Environment Changes,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qiangdao 266061,China;
University of Chinese Academy of Sciences,Beijing 100049,China;
Haze; Iodine isotopes; Aerosol; Primary nuclei; Secondary air particles; Formation mechanism of particles;