Analysis of spatial and temporal futures of atmospheric environmental carrying capacity of Zhejiang Province

SO2,NO2,PM10 were selected as development variables to investigate the atmospheric environmental carrying capacity of Zhejiang Province.Pollutant concentration less than 75%of annual average concentration of secondary standard of air quality standard(GB 3095-1996)was used as restricted variables to calculate the atmospheric environmental carrying capacity index.The spatial and temporal futures and impact factors of Zhejiang atmospheric environmental carrying capacity from 2009to 2011were analyzed by the means of relative remain rate and index of atmospheric environmental carrying capacity.The results showed that besides Shaoxing,other 10prefecture-level cities of Zhejiang Province have SO2 environmental capacity;all 11prefecture-level cities have NO2 environmental capacity; only Zhoushan,Lishui and Quzhou have PM10 environmental capacity.The atmospheric environmental carrying capacity of the 11prefecture-level cities is in middle and low stage.During 2009-2011,the atmospheric environmental capacity of the three main atmospheric pollutants and the atmospheric environmental capacity index of the whole province are both declined.