MODIS资料遥感黄土高原半干旱地区气溶胶光学厚度  

Remote sensing aerosol with MODIS over aerosol optical depth of semi-arid regions in the loess plateau

作　　者：张玉洁[1,2] 陈艳[2] 张武[2] 高林[1] 苑文华 常倬林 

机构地区：[1]山东省气象局大气探测技术保障中心,济南250031 [2]兰州大学大气科学学院半干旱气候变化教育部重点实验室,兰州730000 [3]山东省枣庄市气象局,山东枣庄277100 [4]河北省气象培训中心,石家庄050000

出　　处：《兰州大学学报（自然科学版）》2011年第1期43-51,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：中央高校基本科研业务费专项资金项目(860348)

摘　　要：借助6S辐射传输模式,模拟了MODIS红、蓝、中红外通道的表观反射率在不同气溶胶类型下对地表反射率和气溶胶光学厚度的敏感性试验.利用Kau fman扩展的暗像元方法反演了黄土高原半干旱地区晴空天气条件下的2.5km高分辨率气溶胶光学厚度,选取的10天反演结果有6天的相对误差较小,在16%以下,绝对误差小于0.05的有7天.反演的10天资料中,兰州大学半干旱气候与环境观测站与之对应的CE-318观测资料的光学厚度平均值为0.2226,反演的平均值为0.2170,反演结果较合理.将反演结果与CE-318观测资料和NASA发布的气溶胶产品进行了对比,显示反演结果与NASA发布结果的空间发布存在一致性.The sensitivity tests were taken for both the surface reflectivity and aerosol optical depth（AOD） to the apparent reflectivity at the red, blue and mid-infrared channels of MODIS under different aerosol types, with the 6S radiative transfer model（RTM）. The extended dark target algorithm developed by Kaufman was used to retrieve the AOD of 2.5 km resolution in clear days over the semi-arid climate and environment observatory of Lanzhou University （SACOL） and the surrounding areas with contemporaneous MODIS data. The mean of AOD measured with sun-photometer CE-318 at SOCAL was 0.222 6 and the mean of retrieved AOD was 0.2170 in the 10 days. The results of retrieval are reasonable. The relative error of the retrieved results to the measurements was less than 16% in 6 days, and the absolute error was less 0.05 in 7 days. A comparison between the retrieved AODs and the products released from NASA was made, to the effect that they had high level of consistency.

关 键 词：MODIS资料 反演 气溶胶光学厚度 半干旱地区 黄土高原 

分 类 号：P402[天文地球—大气物理学与大气环境]