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模型ID：

M00039

模型名称：

LIBERTY模型

模型编码者：

序号	姓名	联系方式
1	Dawson	terry.dawson@ecu.ox.ac.uk

模型关键字：

LIBERTY，针叶结构

模型类型：

理论模型

模型最后修改日期：

模型提交日期：

模型摘要：

针叶叶片具有特殊的结构：没有明显的栅拦组织，其剖面内几乎都是球形细胞。

公式：

1	名称：平均细胞直径d	参数类型：int	物理意义：平均细胞直径Average internal cell diameter
2	名称：细胞内上行辐射分量的细胞间隙xu	参数类型：double	物理意义：细胞内上行辐射分量的细胞间隙Intercellular air space determinant
3	名称：基吸收	参数类型：double	物理意义：基吸收Baseline absorption
4	名称：白化吸收	参数类型：double	物理意义：白化吸收
5	名称：针叶厚度t	参数类型：double	物理意义：针叶厚度t
6	名称：叶绿素含量	参数类型：double	物理意义：叶绿素含量Chlorophyll (mg/g)
7	名称：水分含量	参数类型：double	物理意义：水分含量Water (% dry mass)
8	名称：蛋白质含量	参数类型：double	物理意义：蛋白质含量Nitrogen (% dry mass)
9	名称：木质素和纤维素含量	参数类型：double	物理意义：木质素和纤维素含量Lignin (% dry mass)

标题：

LIBERTY—Modeling the Effects of Leaf Biochemical Concentration on Reflectance Spectra

文献作者：

序号	姓名	联系方式
1	Terence P. Dawson
2	Paul J. Curran
3	Stephen E. Plummer

文献引用：

REMOTE SENS. ENVIRON

文献摘要:

The conifer leaf model LIBERTY (Leaf Incorporating Biochemistry Exhibiting Ref lectance and Transmittance Yields) is an adaptation of radiative transfer theory for determining the optical properties of powders. LIBERTY provides a simulation, at a fine spectral resolution, of quasiinfinite leaf ref lectance (as represented by stacked leaves) and single leaf ref lectance. Single leaf reflectance and transmittance are important input variables to vegetation canopy ref lectance models. A prototype parameterization of LIBERTY was based upon measurements of pine needles and known absorption coefficients of pure component leaf biochemicals. The estimated infinite-ref lectance output was compared with the spectra of both dried and fresh pine needles with root mean square errors (RMSE) of 2.87% and 1.73%, respectively. The comparisons between measured and estimated ref lectance and transmittance values for single needles were also very accurate with RSME of 1.84% and 1.12%, respectively. Initial inversion studies have demonstrated that significant improvements can be made to LIBERTY by utilizing in vivo absorption coefficients which have been determined by the inversion process. These results demonstrate the capability of LIBERTY to model accurately the spectral response of pine needles.

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