基于高光谱分辨率激光雷达的气溶胶分类方法研究

发布时间：2018-01-06 20:42

  本文关键词：基于高光谱分辨率激光雷达的气溶胶分类方法研究　出处：《红外与激光工程》2017年04期 　论文类型：期刊论文

  更多相关文章： 高光谱分辨率激光雷达 气溶胶分类 消光系数 激光雷达比 退偏振比

【摘要】：气溶胶是影响气候变化和空气质量的重要因素,对气溶胶作用的量化分析依赖于气溶胶光学性质及其垂直剖面的精细探测。高光谱分辨率激光雷达利用窄带光学滤波器,可在光谱上实现对分子散射和气溶胶散射的分离,从而在不需假设气溶胶激光雷达比的情况下,独立获取气溶胶消光系数和后向散射系数。文中基于高光谱分辨率激光雷达技术,开展气溶胶分类方法研究。根据已有的气溶胶分类研究结果,给出基于气溶胶光学参数的分类方法,并建立气溶胶分类查找表。利用高光谱分辨率激光雷达于2015年春季在青岛地区测量的气溶胶消光系数、后向散射系数和退偏振比,参照建立的气溶胶分类查找表,实现了对气溶胶的分类识别,并用HYSPLIT轨迹模式、NAAPS气溶胶模式进行了印证。个例研究结果表明该方法能够实现对气溶胶类型的正确识别。
[Abstract]:Aerosol is an important factor in the impact of climate change and air quality, the quantitative analysis on the effects of aerosol fine detection depends on the optical properties of aerosol and its vertical profile. High resolution spectroscopy using narrow band optical filter, can realize the separation of molecular scattering and aerosol scattering in the spectrum, resulting in the situation without the assumption of aerosol lidar independent access ratio, aerosol extinction coefficient and backscattering coefficient. The laser radar technology based on high spectral resolution, to carry out the research on aerosol classification method. According to the existing aerosol classification results, given classification method based on aerosol optical parameters, and the establishment of aerosol classification lookup table. The aerosol extinction coefficient with high spectral resolution laser radar in the spring of 2015 in Qingdao area measurement, backscattering coefficient and depolarization ratio, with reference to the establishment of The aerosol classification lookup table has realized the classification and recognition of aerosols, and has been verified by the HYSPLIT trajectory mode and the NAAPS aerosol mode. A case study shows that the method can correctly identify aerosol types.

【作者单位】： 中国海洋大学海洋遥感研究所;北京华航无线电测量研究所;中国海洋大学电子工程系;
【基金】：国家自然科学基金(40905005,41375016)
【分类号】：TN958.98
【正文快照】： Mie散射激光雷达的基础上发展而来的一种高精度0引言气溶胶探测技术,也是目前公认的与Raman激光雷达并列的两种可不需要条件假定、直接探测气溶胶气溶胶是由分散并悬浮在大气中的固态、液态消光系数的技术之一[9-10]。Raman激光雷达虽然可以和固液混合态微粒所形成的胶体分散，

本文编号：1389487