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利用MODIS卫星和激光雷达遥感资料研究香港地区的一次大气气溶胶污染
AN AEROSOL POLLUTION EPISODE IN HONG KONG WITH REMOTE SENSING PRODUCTS OFMODIS AND LIDAR
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摘要: 利用MODIS可见光通道气溶胶光学厚度的卫星遥感和523 nm波长微脉冲激光雷达 (MPL LIDAR) 对气溶胶消光系数垂直分布的观测，分析了珠江三角洲地区2003年6月一次气溶胶污染过程中气溶胶光学厚度的分布特征、气溶胶消光系数廓线的演变，认为这次污染过程是弱高压控制下的区域性污染，而香港地区污染物浓度的上升与区域性输送有直接关系，结果表明卫星和激光雷达的光学遥感方法提供了研究大气污染的可行手段。Abstract:
Aerosol optical depth data from MODIS visual channels and aerosol extinction coefficient profiles from MPL LIDAR are used to study an aerosol pollution episode in the Pear River Data on June 18 and 19, 2003. The regional distribution pattern of aerosol optical depth and the evolution of aerosol extinction coefficient profiles in mixing layer form remote sensing methods are given to demonstrate that the air pollution case caused by weak stable high system has a regional coverage and contributes to the surface air pollution in Hong Kong. The results show that satellite and LIDAR remote sensing provide new ways in air pollution study.
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图 4 MODIS气溶胶光学厚度产品
(a)2003年6月Terra和Aqua遥感AOD平均值; (b)2003年6月18日10:25 Terra获取的AOD分布; (c)2003年6月18日13:30 Aqua获取的AOD分布; (d)2003年6月19日11:05 Terra获取的AOD分布 (来自NASA反演Level2产品，图中斜格区域为因多云或卫星轨道未覆盖的无数据区域)
图 6 香港地区MODIS 1 km AOD分布 (a)2003年6月18日13:30 Aqua，(b)2003年6月19日11:05 Terra
(图中黑色部分为海面，陆地白色部分为有云或地表植被稀少反射率比较高的地带，；两处均没有数据)
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