【作者】 王德辉；

【导师】 夏丽华；

【作者基本信息】 广州大学 ， 自然地理学， 2007， 硕士

【摘要】 本文探讨了MODIS(Moderate Resolution Imaging Spectrometer)气溶胶产品在珠江三角洲的可用性及珠江三角洲气溶胶的发生系统；建立了珠江三角洲大气气溶胶的多源数据监测模式并进行了个例研究：通过晴空表观反射率法和环境数据响应法，探讨了NASA的MODIS气溶胶产品在监测珠江三角洲地区大气气溶胶污染中的可用性。研究显示珠江三角洲地区具备较好的暗背景条件，MODIS气溶胶产品可用于珠三角地区的气溶胶观测的定性或半定量分析中。对珠江三角洲的遥感气溶胶产品与多年统计数据进行了分析，得出了珠江三角洲气溶胶污染的时空变化特点，建立了大气气溶胶发生系统。研究显示珠三角气溶胶污染的时空变化规律是由珠江三角洲地区表层开放复杂系统的整体作用决定的。通过将遥感影像数据、探空数据和地面观测数据结合，建立了珠江三角洲大气污染多源数据监测的ISO(Image-Sounding-Observing)模式。案例分析显示珠三角地区的气溶胶粒子主要为自身排放的超细颗粒物。气溶胶光学厚度高值具有沿交通线延伸，呈线状分布的特点，说明汽车尾气排放是珠江三角洲气溶胶污染物的最主要来源。在有利于污染物滞留的天气状况，MODIS数据与PM10等地面各站点污染物监测数据可形成较好的优势互补。该模式可以对珠江三角洲地区的大气污染的发生做出预警，提供分区和分时段的大气污染物排放量的控制方案，从时间和空间上避开气溶胶污染物过度累积，减轻污染强度，甚至避免此次大范围大规模灰霾污染事件的爆发。更多还原

【Abstract】 Aerosols play a crucial role in air pollution problems in Pearl River Delta region. This study focuses on the usability of MODIS LevelⅡAerosol Optical Depth(AOD) products (MOD04 and MYD04), genetic system of aerosols in the Pearl River Delta (PRD), the Image-Sounding-Observed data (ISO) pattern used in monitoring aerosols and its application in regional air pollution studies.A method based on MODIS1b data, which compare the linear relation of band1 with band7 and band3 with band7 in apparent reflectance respectively between the typical dark backgrounds with the typical background of PRD region, is used to validate the usability of dark background method in PRD region. The result indicates that there is good linear relation in apparent reflectance between band 1, 3 and band7 in PRD region. It shows that the dark background inversion method of MODIS AOD can be used in PRD region. The correlation between the time series of PM10, the hour mean value during TERRA satellite overpass Guangdong, and the time series of AOD in 4 environmental monitoring stations in Guangzhou among some days, which is unfit for atmospheric pollutants diffusion, from October to November, 2004, was analyzed. The study shows that the correlation is good and the MODIS LevelⅡAOD values from NASA can be used to monitoring the aerosols of the PRD region qualitatively or quasi-quantitatively.The aerosols property of PRD region was analyzed based on MODIS AOD product and statistic data. It shows that PRD region is one of high-aod-value centers in Guangdong Province. The aerosol sources of PRD region are from local emission and regional transportation. The aerosol pollution in PRD region occurs in all reasons, but mostly appears in the winter half. year. The properties above are determined by the genetic system of aerosols in the PRD region.Due to the dual nature of MODIS data and complexity of the genetic system of PRD region aerosols, it is a better way to utilize the image data, sounding data and observed data comprehensively. The ISO (Image-Sounding-Observed data) pattern, a multi-source data monitoring pattem, was used to analysis an aerosol polluted case during Oct.20 to 24, 2004.The study shows that ultra-fine particles formed by local automobile exhaust emission is the leading source of the aerosol pollutants. The high AOD pixels distributes along traffic lines。The pattern can be applied to monitoring, forewarning and controlling the aerosol pollution of PRD region effectively.更多还原