近10年呼和浩特空气质量变化特征分析

Analysis of air quality variation characteristics in Hohhot in recent 10 years

本文分析了2001～2011年呼和浩特市SO_2、NO_2和PM_10三种污染物变化特征和其与气象条件的关系。结果显示：呼和浩特市空气质量状况逐渐提高；全年中，冬季、春季污染较为严重，空气质量状况较差，夏季、秋空气质量较好。PM_10为首要污染物。

The article analyzed the daily average concentration values of PM_10 ,SO_2 ,NO_2 during the heating period from 2004 to 2010. The results show that the quality of air pollution is heating downwards during the heating period in Hohhot. Between mid to late Dec to through Jan concentration of PMI0 ,SO2 is larger. The reason is that the amount of coal increase during the period. In addition, the other high concentration of PM_10 happens in Mary. The phenomenon is close contact to dust storm weather in sping.