草业学报2016，Vol.25Issue(8)：1-13,13.DOI:10.11686/cyxb2015489
我国西北地区东部时间序列 NDVI数据集重建方法比较研究
Comparative studies of reconstruction methods for the long term NDVI dataset in the east of Northwest China
摘要
Abstract
A high-level time-series NDVI dataset is not only the basis for continuous monitoring of the land sur-face,but also an important tool for studying change related to climate and land use factors in terrestrial eco-systems.We reconstructed the noise component of the LTDR NDVI data for the east of Northwestern China where the ecosystem is fragile,using various time-series reconstruction methods.This paper use agrometeoro-logical data and high-level NDVI data to evaluate the accuracy of different reconstruction methods.The results show that:1)The vegetation or crop land cover is an important factor affecting fitted results of the various re-construction methods.Each reconstruction method has a different noise reduction ability depending on differ-ences in vegetation or crop growth characters;2)The D-L reconstruction method has a better noise reduction ability and applicability in those areas of grassland,and woodland for which the annual average NDVI data is higher (NDVI≥0.3)and the NDVI curve has obvious seasonal changes;3)The S-G reconstruction method has better fidelity ability and applicability in some areas of crop land in winter wheat and in areas of sparse vegeta-tion for which annual average NDVI data are lower (NDVI<0.3)and where the NDVI curve have no obvious seasonal changes.关键词
NDVI/时间序列重建/植被遥感/AVHRRKey words
NDVI/time-series data reconstruction/vegetation remote sensing/AVHRR引用本文复制引用
王玮,郭铌,沙莎,胡蝶,王小平,李耀辉..我国西北地区东部时间序列 NDVI数据集重建方法比较研究[J].草业学报,2016,25(8):1-13,13.基金项目
甘肃省气象局气象科研项目（GSMAMs2016-10），中国博士后科学基金项目（2015M582734）和公益性行业（气象）科研专项（重大专项）（GYHY201506001-5）资助。 （）
