The concentration characteristics of SO3, NO2 and PM10 in China's key environmental protection cities from 2006 to 2010 were analyzed based on the daily reported data of atmospheric pollution. The results showed that the concentrations of SO, and FM10 declined continuously and significantly, but the change of NO2 did not show a significant trend. The three kinds of pollutants had common seasonal variation characteristics, which were higher concentrations in winter and lower in summer. The variations of mass concentrations of SO2, NO2 and PM10 across the whole country were in the ranges of 0-0.150, 0-0. 100 and 0-0.250 mg/m3, respectively. The peak concentrations of SO, and PM10 decreased gradually from 2006 to 2010, and the number of high pollution cases were also reduced, which indicated that the two kinds of pollutants were controlled during this period. However, the peak concentration of NO, changed very little over these years. As for the annual change rates of the concentrations of SO2, NO, and PM10 in the provinces of China, the maximum declining values were in Shanxi Province, which were - 11.2, -3.6 and - 14.2 μg/m3. The yearly change rates of SO, in Qinghai Province and of NO, and PM10 in Shandong Province increased remarkably, which were 4.4, 2. 7 and 4. 5 μg/m3, respectively.
key environmental protection citiesSO2NO2PM10concentration distribution
NETL
NSTL
万方数据
