Comparisons of MODIS LAI products and LAI estimates derived from Landsat TM

文献类型： 外文期刊

第一作者： Yang, Peng

作者： Yang, Peng;Chen, Zhongxin;Zhou, Qingbo;Zha, Yan;Wu, Wenbin;Shibasaki, Ryosuke

作者机构：

关键词： leaf area index (LAI);Moderate Resolution Imaging Spectroradiometer (MODIS);Landsat Thematic Mapper (TM);validation;North China Plain (NCP);winter wheat

期刊名称：2006 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-8

ISSN： 2153-6996

年卷期： 2006 年

页码：

收录情况： SCI

摘要： Numerous pre- and post-launch validation researches have been applied on the MODIS LAI products. However, the validation activities were mainly located in North America, Europe and Africa. The validated vegetation types were mainly focused on woodlands (broadleaf forest, coniferous forest and shrubland) and savannas (woody savannas and savannas). In this study, we evaluated the Collection 4 MODIS LAI (MOD15A2) products in North China Plain, with emphasis on the croplands, by: (1) deriving empirical LAI validation maps, based on in situ measurements and Landsat Thematic Mapper (TM) images; (2) conducting initial MODIS validation exercises to assess the quality of MODIS products. The results indicated the MODIS LAI products could resemble the general patterns of the LAI seasonal variation of vegetations in North China Plain, but MODIS LAI algorithm had underestimated LAI values obviously (down to 2-3 m(2)/m(2)). Biome misclassification and cloud effect were thought to be the main reasons for the significant underprediction of MODIS LAI products.

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