Based on the environmental monitoring data and meteorological data in Changchun City during the last three years,seasonal variation characteristics of the main pollutant PM10 were analyzed. The statistical correlation between PM10 concentration and six meteorological factors was analyzed,including average temperature,precipitation,relative humidity,visibility,average wind speed and air pressure. The results showed that the PM10 concentration was about 0.097-0.100 mg/m3 from 2006 to 2008 and had no significant increasing or decreasing trend in the three years. The PM10 concentration in Changchun showed significant seasonal variations;it was obviously a bit higher in winter and spring,lower in summer. The PM10 pollution primarily attained Grade Ⅱ in the recent three years,and it accounted for 87.7%. PM10 pollution was heavier on the day when it was accompanied by fog,smog,gale and dust. The results showed that PM10 concentration had a negative correlation with the average temperature,precipitation,visibility and average wind speed,and had a positive correlation with relative humidity and air pressure.
