星地结合的细颗粒物超标防控区精确识别方法

A Satellite Remote Sensing and Site Monitoring Combined Method of PM2. 5 Concentration Off-limit Areas Accurate Recognition

为精确识别细颗粒物(PM 2.5)浓度超标的区域空间,依据卫星遥感与站点监测在PM 2.5浓度观测方面的特点,建立遥感反演数据与站点监测数据间的临界映射分析法,综合卫星遥感覆盖面广和站点监测准确性高的技术优势。通过该方法研究珠三角区域2013年灰霾污染过程的PM 2.5浓度超标区域,结果表明,利用星地结合的方法可以精确识别出PM 2.5浓度超标的区域空间;广州市西部和南部、佛山市大部、肇庆市主城区及东南部、东莞市西部和北部、中山市北部和中部、江门市主城区及东部是珠三角PM 2.5污染的高发地区,应作为防控重点。

In order to accurately identify the region with excessive PM 2.5 concentration,a threshold mapping method was established to combine the technological superiorities of satellite remote sensing and site monitoring.Base on wide spatial coverage of satellite remote sensing data and high accuracy of site monitoring data,the new method could be used to analyze PM 2.5 concentration spatial distribution and help figuring out exceeding standard areas accurately.According to the analysis in Pearl River Delta Region(PRD)in 2013,the frequencies of PM 2.5 concentration exceeding standard are significantly different among the districts and towns within PRD.While having high incidences of PM 2.5 pollution,southwest Guangzhou,most area of Foshan,southeast Zhaoqing,north and west Dongguan,north Zhongshan and northeast Jiangmen should be prioritized in the regional air pollution control.