Surface Environment Change Impact on Fog Days in Nanjing Area

For studying the impact of surface environment change on the local climate, the change of fog days in Nanjing area during 1960-2007 is studied. Total foggy days in Nanjing urban districts like as lots of other city has been decreased, but that of Jiangpu (in Nanjing suburb) has been increased clearly. The research results show that different surface environment affects fog days change obviously. The rock desertification of urban surface reduces the vegetation overlay area which causes the ground surface dryness and fog days decrease, whereas the increasing fog days is related to the enhancing vegetation overlay area and moisture. Moreover, the vegetation causes adding carbon sinks so that the urban vegetation recovery plays an important role at the carbon emission reduction.