利用位于中国气象局南京综合观测基地的Rayleigh-Raman-Mie激光雷达Raman通道实测数据反演分析南京北郊气溶胶光学特性。在反演计算消光系数的过程中发现Raman信号波动很大、起伏很多,对我们反演结果带来了很大的困难,导致消光系数值波动范围达到-0.1~0.4 km-1。经过反复试验计算,用小波去噪解决这个问题,并将其反演结果与同一时刻同一仪器不同通道(Mie通道)反演结果进行对比,2011年3月30日晴天条件下二者消光系数都在0.05 km-1左右,它们的趋势具有很好的一致性,表明小波去噪能提高Raman散射反演气溶胶光学特性的准确性。

Analysis of the optical characteristics of aerosol in Nanjing by using the data from the Raman channel of Rayleigh-Raman-Mie Lidar,which belong to the Comprehensive Observation Base of China Meteorological Administration,is presented in this paper.In the inversion calculation of extinction coefficient,Raman signal fluctuates greatly,which causing the extinction coefficient value to fluctuate within the range of -0.1~0.4 km-1,and bring great difficulties in inversion results.After repeated inversion calculation.We found wavelet denoising can solve this problem,and the inversion results with the same instrument at the same time from different channels (Mie channel) inversion results were compared.The extinction coefficient value of there are both about 0.05 km-1 in March 30,2011,and the trends of the results are consistent.The results show that the wavelet denoising can improve the inversion calculation accuracy of the aerosol optical properties.