Figure 7 presents the spatial distribution of cumulative active fire detections over eastern Asia and Asian Russia from March to December 2008. It was evident that Asian fires mainly scattered in six major source areas such as the south of the Central Siberian Plain and part of Middle Asia, the east of China, Northeast China and its boundary bordering Russia, the south of the Eastern Siberian Plateau, the Baikal Lake and east next to Mongolia, and the north of India. We also analyzed relationships of BC at Tongyu with daily active fire counts at each 1° × 1° cell and calculated their correlation coefficients, considering fire emission contribution to BC at the receptor site by outflow transport of an interval period from fire source areas.