Validation of CAPPS in Shijiazhuang,Hebei province

According to "the quality test and temporary management methods of air quality prediction in China Meteorological Administration",the validation of the city air pollution numerical prediction system(CAPPS) was conducted in Shijiazhuang.The prediction ability and the errors of CAPPS1.0 and CAPPS2.0 were analyzed.The results indicate that the prediction results of CAPPS2.0 are better than those of CAPPS1.0.However,the prediction value is often higher than the observation value,which results in the lower quality test of the main pollutants in winter and the lower prediction precision of high pollution in summer.The prediction precision of CAPPS depends on the factual pollution situation of yesterday.The prediction results lag and the prediction precision to high concentration pollution days is merely 13%.