中文摘要：

固有光学量描述了水体的吸收、散射等光学特性,随波长变化而呈现出连续的光谱。固有光学量光谱拟合不仅简化了固有光学量的表达,便于代入水质参数反演的解析模型或是代入模拟水体辐射场的正向模型中去;还有助于利用拟合得到的参量定量地对比不同水体的固有光学特性。本文从非藻类颗粒物吸收系数光谱、有色溶解性有机物吸收系数光谱、浮游植物吸收系数光谱、总颗粒物体散射函数光谱及后向散射系数光谱4个方面出发,归纳了国内外湖泊水体固有光学量光谱数据拟合方法,同时对比了以往文献中的拟合得到的参量,进一步分析总结了这些参量与色素成分、化学组成、细胞粒径、浑浊程度等水体状况的内在关系,并给出了近几年内出现的一些前沿方向。在4类固有光学量中,当前最常用且最被认可的是有色溶解性有机物吸收光谱的拟合,拟合结果常被直接代入到生物光学模型中去。在拟合光谱时,需要更多地重视选用的参考波长、光谱范围、模型类别等拟合方法。拟合非藻类颗粒物吸收光谱、有色溶解性有机物吸收光谱时,建议采用负指数模型而不是取对数后的线性形式模型;采用指数模型拟合浮游植物吸收光谱与叶绿素a浓度的关系时,选择675nm为参考波长要优于选择443nm。在拟合总颗粒物后向散射光谱时,常采用负指数模型或双曲线模型,其中双曲线模型被采用的较多。体散射函数β(ψ0,λ)随波长变化的光谱形状不都相似,有些会在色素吸收特征波长处表现出峰值特征,有些随波长向长波方向移动而递减。本文成果将有助于促进湖泊水体固有光学量的分析与应用。

英文摘要：

Inherent optical parameters (IOPs)describe the optical properties of water,including absorption and scattering properties,which are always continuous spectra versus wavelength.Spectra curves fitting for IOPs not only simplify the expression but also is beneficial to compare quantitatively IOPs in different waters via fitting variables,which is easier to be substituted into semi-analytic models to retrieve water quality parameters or into forward models to simulate radiance distribution in water.This paper introduces absorption spectra of non-algae particles,color dissolved organic matters and phytoplankton,volume scattering function and backscattering spectra of total particles.In this paper,the spectral curve fitting methods for IOPs in lakes of China and abroad are summarized,and the variables from fitting methods are compared with those in published literature.Furthermore,the paper discusses the relationships between these variables and water body status such as pigments,chemical composition,cell size and turbidity.Several related forefront directions are claimed.During four types of IOPs,the most recognized and frequently used is curves fitting for absorption spectra of color dissolved organic matters,which is always substituted into the bio-optical model directly.The reference wavelength,wavelength range and model type should be paid much more attention in spectral curve fitting.In spectra curve fitting for absorption of non-algae particles and color dissolved organic matter,it is recommended to use negative exponential model but not linear model after the logarithm.Another recommendation is to use 675nm,not 443nm as reference wavelength when using exponential model to fit the relationship between phytoplankton absorption and chlorophyll a concentration.For total particles backscattering,negative exponential model and hyperbolic model are usually used.The latter is used mostly.The shapes of volume scattering function β(ψ0,λ)are not always the same.In them,some show peaks at the wavelengths where abso