Remote sensing of temperate coniferous forest leaf area index The influence of canopy closure, understory vegetation and background reflectance
Remote sensing of temperate coniferous forest leaf area index The influence of canopy closure, understory vegetation and background reflectance
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DOI：
10.1080/01431169008955002
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发表时间：
1990
影响因子：
3.4
通讯作者：
M. Spanner;L. Pierce;D. Peterson;S. Running
中科院分区：
文献类型：
--
作者：
M. Spanner;L. Pierce;D. Peterson;S. Running
摘要美国西部温带针叶林叶面积指数（LAI）与经大气效应和太阳表面传感器几何校正的专题制图仪（TM）数据之间的关系受到树冠郁闭度、林下植被和背景反射率的影响。针叶林叶面积指数与TM波段3（0-63-0-69μm）和5（1-55-1-75μm）之间均存在较强的反曲线关系。相反的关系被解释为增加反射率的林下植被和背景下的低叶面积指数的开放的立场和减少反射率的上层在封闭的冠层与高叶面积指数的立场。在林冠郁闭度大于89%的林分中，LAI与TM波段4（0-76-0-90μm）的辐射强度呈强正相关。低上层叶面积指数的开放式看台有升高的波段4辐射引起的林下植被和/或高反射花岗岩背景。覆盖层不完整的老林分的波段4辐射率较低。
Abstract The relationship between the leaf area index (LAI) of temperate coniferous forests in the western United States and Thematic Mapper (TM) data corrected for atmospheric effects and Sun-surface-sensor geometry was influenced by canopy closure, understory vegetation and background reflectance. Strong inverse curvilinear relationships were observed between coniferous forest LAI and both TM bands 3 (0-63-0-69μm) and 5 (1-55-1-75μm). The inverse relationships are explained by increased reflectance of understory vegetation and background in open stands of lower LAI and decreased reflectance of the overstory in closed canopy stands with higher LAI. A strong positive relationship was observed between LAI and TM band 4 (0-76-0-90μm) radiance in stands with greater than 89 per cent canopy closure. Open stands with low overstory LAI had elevated band 4 radiances caused by understory vegetation and/or a highly reflective granite background. Old growth stands with incomplete overstories had low band 4 radiance...