风的污染指数在大气污染中的应用

根据无锡特定的气候条件，对风的污染指数Id进行修正，并将Id=0．27定为污染型和清洁型的临界值。Id作为反映污染程度的指标，与SO2的线性相关较好，而与NOx几乎无相关性；通过风的污染指数Id计算的污染机率，与污染主要来源于上风向污染物长距离输送的监测点污染物浓度相关性较好，因此，风的污染指数Id经过修正后可以用来判断SO2等长距离输送类污染物的污染程度。

Application of Wind Pollution Index in the Air Pollution

According to the specific climatic conditions in Wuxi, the wind pollution index Id is amended, and take Id =0. 27 as the marginal value between pollution and clean. As a index to indicate the degree of pollution, Id has a good linear correlation with SO2, while almost no correlation with NOx. The probability of pollution calculated from the wind pollution index Id has a good correlation with the concentration of windward pollutants at the monitoring point where pollutants has been transported for a long distance. Therefore, the amended wind pollution index Id can be used to determine the pollution level of pollutants like SO2 that has been transported for a long distance.