中文摘要：

将植物叶片光谱模型PROSPECT、植被冠层光谱模型SAIL与大气辐射传输模型6S进行耦合,模拟不同参数条件下植被星上光谱信息在400～900 nm谱段的变化,并分析从地表植物叶片光谱、冠层光谱到卫星入瞳处光谱的过程中,植物叶片的叶肉结构参数、叶绿素含量、干重、叶片含水量和植物冠层的叶面积指数（LAI）、太阳天顶角、气溶胶光学厚度、地表邻近效应以及混合像元等参数对植物光谱的影响。研究结果表明,由大气引起的误差要远大于由植物本身的各种生化参数引起的误差;在叶片尺度上引起反射率发生变化的主要因素是叶绿素含量和叶肉结构参数,含水量的影响非常小,可以忽略;在冠层尺度上引起光谱发生变化的因素主要有LAI和叶片倾角。

英文摘要：

Coupled plant leaf spectral model PROSPECT,vegetation canopy spectral model SAIL（scattering by arbitrarily inclined leaves） and atmospheric radiative transfer model 6S（second simulation of the satellite signal in the solar spectrum） were used to simulate the top of atmospheric（TOA） reflectance of vegetation under different conditions.And then the influences on the spectrum of the leaf mesophyll structure parameters,chlorophyll content,leaf dry weight,leaf water content,plant canopy of LAI,solar zenith angle,aerosol optical thickness（AOT）,adjacency effect and mix-pixel effect were analyzed.The research results show that the vegetation TOA reflectance error caused by the atmosphere is by far larger than the error caused by the biochemical parameters of plant itself.At the leaf level scale,the main factors causing reflectance change are chlorophyll content and mesophyll structure parameters,the effect of water content is very small on leaf reflectance in 400 ～ 900 nm.At the canopy level,the main factors causing spectral change are LAI and leaf angle distribution.