激光雷达反演消光系数的k值确定方法  

Method for Determining the k Value in Lidar-Derived Extinction Coefficients

作　　者：马蕾 褚颖佳 杨亮亮 姚文姣 赵子龙 MA Lei;CHU Yingjia;YANG Liangliang;YAO Wenjiao;ZHAO Zilong(Shandong key Laboratory of Meteorological Disaster Prevention and Reduction,Jinan 250031,China;Jinan Meteorological Bureau,Jinan 250102,China;Qingdao Leice Transient Technology Co.Ltd.,Qingdao 266101,Shandong China)

机构地区：[1]山东省气象防灾减灾重点实验室,济南250031 [2]济南市气象局,济南250102 [3]青岛镭测创芯科技有限公司,山东青岛266101

出　　处：《河南科学》2024年第12期1753-1761,共9页Henan Science

基　　金：山东省气象局科学技术研究项目(2023sdqxz09)。

摘　　要：利用济阳国家基本气象站1550 nm米散射激光雷达观测数据,对反演气溶胶消光系数过程中k值的确定方法进行了初步研究.基于雷达原始信噪比信号,利用Klett法反演得到气溶胶消光系数,训练建立气溶胶消光系数神经网络预测模型.使用模型得到当前时刻气溶胶消光系数预测值,反推计算k值.使用得到的k值反演气溶胶消光系数,并与使用能见度数据计算的气溶胶消光系数对比分析,相关系数达到0.920,气溶胶消光系数反演效果得到明显提升.Using observational data from the 1550 nm elastic-scattering lidar at the Jiyang National Basic Meteorological Station,the method for determining the k value in the inversion process of aerosol extinction coefficients was preliminary studied.Based on the original signal-to-noise ratio(SNR)of the lidar,the Klett method was applied to invert the aerosol extinction coefficient,and a neural network prediction model for the extinction coefficient was trained and developed.The model was used to predict the aerosol extinction coefficient at the current time,and the k value was subsequently calculated in reverse.This k value was then used to invert the aerosol extinction coefficient,which was compared with the extinction coefficient derived from visibility data,yielding a correlation coefficient of 0.920.The accuracy of aerosol extinction coefficient inversion was significantly improved.

关 键 词：激光雷达 神经网络模型 后向散射消光对数比k 气溶胶消光系数 能见度 

分 类 号：P412.25[天文地球—大气科学及气象学]