Effects of long-range transport of air pollutants on island city pollution

To investigate the pollution formation and causes of island city, the MM5/CALPUFF modeling system was applied to quantificationally calculate the effects of air transportation on air quality in Zhoushan islands. The results show that Shanghai had the biggest contribution for the air pollution in Zhoushan which mainly due to the transmission of pollutants in upper northwest atmosphere in winter, with SO2 71%~79% and NO2 72%~83%; and Zhejiang had dramatical influence on the condition of south wind, with SO2 52%~63% and NO2 49%~55% in summer, respectively. Heavy air pollutions were continually emerged, which considered relevant weather conditions such as frequent and high-speed northwest or northerly wind, the highest concentration of all monitoring sites were 122~194 μg/m3per hour and 98% of contribution from regional transportation. A suggestion was presented that air quality improvement in Zhoushan islands should be jointed prevention and control with other cities.