摘要
对 2 0 0 1年在北京地区利用太阳光度计观测的气溶胶光学厚度和NASA发布的MODIS气溶胶产品进行了比较 ,验证了这一卫星遥感产品的可靠性 ;比较了 2 0 0 1年MODIS气溶胶光学厚度 (AOD)产品和由空气污染指数 (API)计算的每日平均可吸入颗粒物 (PM1 0 )浓度 ,得到了比较高的相关系数 ,证实该气溶胶产品可用于污染分析。将北京地区AOD与气象能见度观测资料进行比较 ,得到了不同季节的气溶胶“标高”。利用统计的不同季节的气溶胶标高 ,从光学厚度的季节分布得到了能见度 (能见距离 )的季节分布。气溶胶光学厚度图像的个例分析表明 ,除局地排放外 ,周边区域 (主要为西南和南向 )的输送对北京市区的空气污染贡献份额较大。卫星遥感气溶胶可以比较直观地再现污染物的区域分布和输送 。
The MODIS aerosol optical depth (AOD) and averaged mass concentration of respirable suspended particulate (PM 10) calculated from released API data are compared, and a high correlation coefficient of 0 232 with data pairs of 107 has been gotten The relations between the visibilities and the AOD values with distinct mean aerosol scale heights in different seasons are also gained The seasonal AOD variations in Beijing show the mean AOD value is highest in summer, and it has a decreasing trend from summer to autumn, and then to winter There is a rapid increase from winter to spring due to spring dust in North China Then the seasonal mean visibility distributions of Beijing and its surroundings are estimated based on the seasonal aerosol scale heights and AOD distributions The case studies described by the AOD distribution images over Beijing and its surroundings show some dramatic processes, and suggested us the air pollution in Beijing urban area is contributed largely by the regional transport Remote sensing from space has given us a new view to study the air pollution in describing the aerosol distributions from a large coverage
出处
《大气科学》
CSCD
北大核心
2003年第5期869-880,共12页
Chinese Journal of Atmospheric Sciences
基金
国家重点基础研究发展规划项目G1 9990 45 70 0
国家自然科学基金委员会
香港研究资助局联合科研资助基金项目NSFC/HKUST3 6共同资助
