文献类型： 外文期刊

作者： Fu, Zhuo ¹ ; Wang, Jindi ¹ ; Song, Jin L. ¹ ; Zhou, Hong M. ¹ ; Pang, Yong ³ ; Chen, Bai S. ¹ ;

作者机构： 1.Beijing Normal Univ, State Key Lab Remote Sensing Sci, Sch Geog, Beijing 100875, Peoples R China

2.Satellite Environm Ctr, Minist Environm Protect, Beijing 100094, Peoples R China

3.Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing, Peoples R China

4.Natl Engn Res Ctr Informat Technol Agr, Beijing, Peoples R China

关键词： GOMS model inversion; LAI; MODIS; MISR; LiDAR; forest

期刊名称：JOURNAL OF APPLIED REMOTE SENSING （ 影响因子：1.53； 五年影响因子：1.565 ）

ISSN： 1931-3195

年卷期： 2011 年 5 卷

页码：

收录情况： SCI

摘要： A new approach for determining the forest leaf area index (LAI) from a geometric-optical model inversion using multisensor observations is developed. For improving the LAI estimate for the forested area on rugged terrain, a priori information on tree height and the spectra of four scene components of a geometric-optical mutual shadowing (GOMS) model are extracted from airborne light-detection and ranging (LiDAR) data and optical remote sensing data with high spatial resolution, respectively. The slope and aspect of the study area are derived from digital elevation model data. These extracted parameters are applied in an inversion to improve the estimates of forest canopy structural parameters in a GOMS model. For the field investigation, a bidirectional reflectance factor data set of needle forest pixels is collected by combining moderate-resolution-imaging-spectroradiometer (MODIS) and multiangle-imaging-spectroradiometer (MISR) multiangular remote sensing observations. Then, forest canopy parameters are inverted based on the GOMS model. Finally, the LAI of the forest canopy of each pixel is estimated from the retrieved structural parameters and validated by field measurements. The results indicate that the accuracy of forest canopy LAI estimates can be improved by combining observations of passive multiangle and active remote sensors. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3594171]