利用MODIS卫星资料对中国中东部和印度次大陆气溶胶特性的分析

利用Terra和Aqua卫星上的MODIS探测反演气溶胶产品,比较分析了中国中东部和印度次大陆地区的气溶胶物理特性的异同。研究结果表明:中国中东部气溶胶类型以烟尘为主,印度次大陆地区东、西部分别以烟尘和沙尘为主。两地气溶胶光学厚度均有明显的年际变化,冬季低,夏季高。在夏季,两地烟尘所占比例都很大,且光学厚度也大,故两地污染状况都比较严重。总体来说,中国中东部地区污染程度要高于印度次大陆地区。

Comparison on Aerosol Properties Between Central and East China and Indian Subcontinent by Using MODIS Products

In order to expose the similarities and differences of aerosol properties,such as aerosol optical depth,aerosol type,mass concentration and fine aerosol fraction,between Central and East China(CEC) and Indian Subcontinent(IS),we studied aerosol properties over the both regions by using standard data sets,aerosol and atmosphere products,derived from the MODIS onboard the Terra and Aqua satellites.Analyzed results show the evident differences of aerosol properties between CEC and IS.Over CEC,the majority of aerosol type is smoke.Higher Aerosol Optical Depth(AOD)and higher ratio of small particles in summer than other seasons indicates severe air pollutant during summer.Over IS,the majority of aerosol is dust in west part and smoke in east part during spring,and AOD is low.But in summer,the whole IS is dominated by smoke aerosols that results in higher AOD.Analysis indicates much more pollutant during summer in IS.But more pollutant can be found in CEC than in IS.Furthermore,AOD of two locations are highest in summer and lowest in winter in interannual variation.