supported by the Natural Science Foundation of China(No.41103061);the Doctoral Fund Project of the Ministry of Education of China(No.20110141120015);the National Basic Research Programme(973)of China(No.2011CB707106)
In January 2013, a long-lasting severe haze episode occurred in Northern and Central China; at its maximum, it covered a land area of approximately 1.4 million km2. In Wuhan, the largest city in Central China, this ev...