Characteristics of MERRA-2 Black Carbon in Eight Key Climatic Regions across China from 2007 to 2018Yong Zhang, Junli Jin, Yanan Li, Dajiang Yu, Qing Zhou and Lina GaoE3S Web Conf., 194 (2020) 04060DOI: https://doi.org/10.1051/e3sconf/202019404060