大气订正对MODIS植被参数的影响研究  

Research for the Influence of Atmospheric Correction on MODIS Vegetation Index

作　　者：胡晓[1] 马耀明[2] 王介民[1] 田辉[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]中国科学院青藏高原研究所,北京100085

出　　处：《高原气象》2007年第4期732-740,共9页Plateau Meteorology

基　　金：国家重点基础研究发展计划项目(2005CB422003);中国科学院知识创新工程重要方向项目(KZCX3-SW-339;KZCX3-SW-231);国家自然科学基金项目(40520140126)共同资助

摘　　要：在"全球能量和水循环实验(GEWEX)亚洲季风青藏高原实验(GAME/Tibet)"实验区采用6S辐射传输模式,对MODIS的前三个波段进行了大气订正,得到订正后的植被参数。NDVI在订正后增大,而EVI在订正后减小,且在季风来临时的7月变化最大,而且EVI经订正后的变化大于NDVI。将订正后的结果与MODIS的植被参数产品进行比较,发现由MODIS植被参数产品得到的结果普遍大于订正后的结果,在季风中的7月和季风后的9月表现的相对明显,且EVI的差别大于NDVI。Using the 6S model for atmospheric correction on the three bands of MODIS over the GAME/Tibet （GEWEX （Global Energy and Water cycle Experiment） Asian Monsoon Experiment on the Tibetan Plateau） area, the vegetation indexes after correction have obtained. It shows that the NDVI increases and the EVI decreases after such correction, also they change dramatically in July during the Asian Monsoon. Comparing with the MODIS vegetation index products, it is found that the latter appears larger basically. This is even obvious in July and September, during and after the monsoon respectively. The difference of EVI seems more evident compared with that of NDVI.

关 键 词：6S辐射传输模型 植被参数 藏北高原 MODIS植被指数产品 

分 类 号：P414.4[天文地球—大气科学及气象学]