利用卫星遥感大气气溶胶进行待建环境监测站点位评估

Assessment of the Location of One Background Monitoring Station to be Built with Particulate Matter Remote Sensing from Space

利用2011—2012年卫星遥感的气溶胶光学参数以及苏州市、无锡市环境监测部门发布的地面PM10质量浓度数据，进行苏州市待建区域背景监测站点的空气质量评估。结果表明，卫星遥感产品在10，5和2km的空间平均尺度下与地面小时浓度显著相关；年平均区域分布的卫星遥感结果显示，苏州市西山待建站点的地面空气质量显著好于城区年均PMIO低，达14％左右。利用客观天气分型技术在各种天气类型下统计分析表明，西山待建站点颗粒物浓度在不同天气类型下低幅变化范围为7％～21％，在区域重污染天气背景以及区域空气质量清洁两种情况下，待建站点与城市站点平均值会更接近，但低幅仍然达7％～9％。

The aerosol optical parameters derived from satellite remote sensing and the related surface PM10 mass concentration data in 2011-2012 over Suzhou and Wuxi Cities were used to assess the location selection of one background monitoring station to be built. The results showed that satellite remote sensing products with 10 kin, 5 km and 2 km space average were all significantly correlated to the hourly PM10 concentration. Showing in the annual average regional distribution of satellite remote sensing results, the annual average PM10 mass concentration over the Xishan （the site to be built in Suzhou） will be significantly lower than those over the urban stations in the magnitude up to 14%. Statistical analysis based on an objective weather classification technique showed that the mean concentration of particulate matter over Xishan were lower than that of urban stations in the amplitude range of 7%-21% in various weather patterns. The smaller （7%-9%） concentration difference between the urban stations and the Xishan station could be found at two types of weather conditions, when there were a regional heavy pollution or a regional clean air quality, respectively.