机载海洋激光荧光雷达测量海表层叶绿素a浓度的算法研究

Algorithmic Research for Measuring Chlorophyll-a Concentration in the Sea Surface Layer by Using Airborne Ocean Fluorescence Lidar

基于中国海洋大学研制的我国首台机载海洋激光荧光雷达系统及其测量海水中叶绿素a浓度的方法;对该系统在烟台至荣成沿岸海域进行实验的情况作一回顾,并对实验数据进行了处理,采用拉曼校正归一方法,反演了海表层的叶绿素a浓度,同时利用激光雷达方程反演出了海水的衰减系数;另外,提出了最小二乘拟合提取信号峰值的新反演算法。反演结果与往年同时期采集数据较为吻合,使用最小二乘拟合提取信号峰值的算法反演的叶绿素a浓度更接近于近期实地测得的结果。

The first airborne ocean fluorescence lidar system in China and its first experiment results along the coastal area from Yantai to Rongcheng are introduced in this paper. Raman Normalization Method is used in retrieving the Chlorophyll-a Concentration in the sea surface layer. A retrieval.algorithm of the least squares simulation method for extracting signal peak values is proposed, And the effective attenuation coefficients of the lidar are retrieved. The results are in agreement with the in situ sampling data in the same period in former years. And the results by using the least squares simulation method are much closer to those in-situ sampling data recently.