基于斜率-扰动法的激光雷达水体剖面参数遥感反演研究

Lidar has the unique advantage of directly detecting the vertical profile of the upper ocean, and is the research frontier in the field of international ocean remote sensing. At present, the lidar inversion for water profile information needs to assume the lidar ratio of the water particles, and the acquisition of this parameter is very difficult, especially in the sea area with complex environment, which restricts the accuracy and application range of the lidar inversion for water profile information. This project proposes to invert the water extinction and scattering coefficient profiles based on the slope-disturbance method, and further develop a profile inversion model of seawater bio-optical quantities (absorption, attenuation, scattering, and chlorophyll concentration) based on extinction and scattering coefficients. This method does not need to assume the lidar ratio, which can provide a new model for the lidar to acquire the water body profile information, and provide a new inversion path for the lidar to be applied for the detection of large-scale water body biological profile.

激光雷达具有直接探测上层海洋垂直剖面结构的独特优势，是当前国际海洋遥感领域的研究前沿。当前，激光雷达水体剖面信息反演需要假定水中颗粒的激光雷达比，而这个参数的获取十分困难，特别是在环境复杂的海区，制约了激光雷达水体光学剖面信息反演的精度和适用范围。本项目创新提出基于斜率-扰动法反演激光雷达消光、散射系数剖面，并进一步发展基于消光、散射系数的海水生物光学量（吸收、衰减、散射、叶绿素浓度）剖面反演模型。该方法无需假定激光雷达比，从而可为激光雷达反演水体剖面信息提供新的模型，并为激光雷达应用于大范围水体生物剖面结构探测提供新的反演途径。

激光雷达具有直接探测上层海洋垂直剖面结构的独特优势，是当前国际海洋遥感领域的研究前沿。针对海洋生物光学剖面结构的探测需求和现有基于激光雷达比反演方法的局限性，发展了无需激光雷达比先验假设的海水光学剖面激光雷达反演方法，通过实测和仿真分析，建立了不同系统参数、水质条件下的激光雷达反演的消光散射与海水生物光学参数转换关系模型，探究了基于激光雷达消光散射的水色剖面反演方法，绘制了南海典型水域次表层叶绿素垂直分布以及漫衰减系数、衰减系数等光学剖面信息产品几十余幅。项目标注的SCI论文合计21篇，其中第一/通讯作者17篇。