Aerosol optical properties and its type classification based on multiyear joint observation campaign in north China plain megalopolis

Yu Zheng, Huizheng Che, Xiangao Xia, Yaqiang Wang, Leiku Yang, Jing Chen, Hong Wang, Hujia Zhao, Lei Li, Lei Zhang, Ke Gui, Xianyi Yang, Yuanxin Liang, Xiaoye Zhang