基于平行偏振等效辐射的颗粒物偏振遥感反演算法研究

离水辐射偏振光谱携带着丰富的水体组分信息，在无机悬浮颗粒物浓度反演、叶绿素荧光信号提取、水体固有光学特性吸收衰减比评估等研究中极具应用潜力。针对当前水体偏振观测仪器缺乏、水体偏振光谱测量困难及水体组分偏振反演算法缺乏等科学问题，本项目拟结合辐射传输模拟与现场观测两种手段研究可见光在悬浮颗粒物（有机、无机）水体辐射传输过程中其偏振特性变化规律，理清离水辐射偏振特性与悬浮颗粒物之间的内在关系，阐明有机和无机悬浮颗粒物对离水辐射偏振特性的影响，着重分析平行偏振等效辐射随有机和无机悬浮颗粒物浓度变化规律及差异性。并在此基础上，构建有机和无机悬浮颗粒物偏振反演算法。本项目的研究可望提出一种实用的水色偏振遥感反演方法，为新型水色偏振遥感器的研制及发展业务化的海洋水色偏振遥感打下基础，促进海洋水色遥感学科的发展，具有显著的科学研究意义。

The polarization spectrum of water-leaving radiance carries embedded information of water constituents, which have potential applications in retrieval of inorganic suspended particulates concentration, phytoplankton chlorophyll fluorescence, and inherent optical properties (IOPs) such as absorption/attenuation ratio. Yet, owing to the lacking of instruments, the practical difficulties in obtaining reliable filed data, the polarization-based retrieval algorithm is still insufficient. In this study, the polarization spectrum characteristic of water-leaving radiance and the relationships along with variation of inorganic and organic suspended particle concentration will be researched, based on radiative transfer simulation and field experiments. And then, the influence of organic and inorganic suspended particles on the polarization of water-leaving radiance will be discussed to establish the polarization-based quantitative retrieval algorithm between parallel polarization radiance (PPR) and inorganic and organic suspended particulate concentration. The proposed project is expected to put forward a practical method for ocean color polarization remote sensing, promote to develop the new polarimetric ocean color remote sensing detector, which can help to advance the development of ocean color remote sensing science and have importantly scientific significance and applicable value.