利用ASTER数据估算2002年4月阿克苏地表特征和植被参数  

Land Surface and Vegetation Variables Estimated from ASTER Data over Akesu Region of Xingjiang in April 2002

作　　者：马伟强[1,2] 马耀明[3,4,1] T.Matsunaga 胡泽勇[1] 仲雷[3] 李茂善[1] 赵逸舟[1] 王永杰[3] 王介民[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100049 [3]中国科学院青藏高原研究所,北京100085 [4]北京师范大学地理学与遥感科学学院,北京100875 [5]National Institute for Environmental Studies,lbaraki,305--8506,Japan

出　　处：《高原气象》2008年第3期544-550,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(40705004,40675012);中国科学院院方向项目(KZCX3-SW-231);国家重点基础研究发展计划项目(2005CB422003);中国气象局成都高原气象研究所开放课题(LPM2007014);冰冻圈科学国家重点实验室开放基金项目(SKLCS07-01);中国科学院国际合作重点项目青藏高原能量水分循环共同资助

摘　　要：利用ASTER卫星可见光和短波红外波段数据,估算了2002年4月12日阿克苏地区地表特征参数(地表温度T、地表反射率α)和植被参数(归一化植被指数NDVI、修正的土壤调整植被指数MSA-VI、植被覆盖度Pv和叶面积指数LAI等)。结果表明,各种植被参数在沙漠地区较小,而在绿洲中的值较大。同时本文认为ASTER遥感数据有较高的地面分辨率,利用它可以更好地反映地表的植被参数及地表特征参数状况;还指出了ASTER卫星数据在沙漠绿洲中的适用性。Using ASTER data on 12 April 2002 from visible and near-infrared band and the short wave infrared band, the land surface variables （land surface temperature, albedo） and vegetation variables （ND- VI, MSAVI, Pv and LAI） over the Akesu area are retrieved. The values of vegetation index are discovered in desert to be less than that in oasis. ASTER remote sensing data have higher resolution and can get the vegetation status reasonably. At the same time ASTER has higher ground resolution, so land surface and vegetation variables can show real land surface variables using its data. The derived surface variables （land surface albedo and surface temperature） over the study area are in good accordance with the land surface status. The experimental area includes variety of land surfaces such as a large area of grassy marshland, some desertification grassland areas, many small rivers and several lakes; therefore these derived parame ters show a wide range due to the strong contrast of surface features. Surface albedois from0 to0.287 in April. Surface temperature ranged from 12 to 38℃ in April. NDVI changed from 0 to 0. 4. MSAVI changed from 0 to 0.25. Pv changed from 0 to 0.11. LAI changed from 0 to 0.25 in April in Akesu area. Further more it points out that ASTER remote sensing data can use in the desert and oasis in this paper.

关 键 词：阿克苏地区 ASTER 植被参数 

分 类 号：P404[天文地球—大气科学及气象学]