气溶胶雷达比和波长指数的仿真研究

宋跃辉; 时丽丽; 鲁雷雷; 李仕春; 辛文辉; 闫庆; 华灯鑫

doi:doi:10.3969/j.issn.1007-5461. 2016.01.015

量子电子学报, 2016, 33 (1): 98, 网络出版: 2016-03-22

气溶胶雷达比和波长指数的仿真研究

Simulation of lidar ratios and Angstr m exponents of different aerosols

论文大纲

宋跃辉 ^*时丽丽鲁雷雷李仕春辛文辉闫庆华灯鑫

作者单位

西安理工大学机械与精密仪器工程学院, 陕西西安 710048

大气光学雷达比波长指数仿真计算气溶胶 atmospheric optics lidar ratio Angstr?m exponent simulation calculation aerosol

摘要

为深入研究气溶胶光散射特性,以米散射理论和粒谱分布为基础,仿真计算了多种气溶胶的雷达比和波长指数,研究了二者与入射光波长、气溶胶尺寸及复折射率之间的关系。仿真结果表明水云和雾在355 nm、532 nm和1064 nm波长的激光雷达比均约为19 sr,波长指数的绝对值很小,表明消光系数与波长之间不存在明显的依存关系。大陆型气溶胶的雷达比与其中soot型气溶胶的含量正相关,这与soot型气溶胶的强吸收性有关。大陆型气溶胶在532 nm波长的雷达比最大,在355 nm和1064 nm的雷达比相对较小。大陆型气溶胶的消光系数随波长增加而减小,其波长指数的平均值约为1.3。

Abstract

Based on the theory of Mie scattering and assumption of particle size distribution, lidar ratios and Angstr?m exponents of many kinds of aerosols were simulated for investigating the light scattering property of aerosols. The relationships between these two parameters and the wavelength of incident light, the size and refractive index of aerosols were researched. The simulation results show that the lidar ratios of water clouds and fog at 355 nm, 532 nm and 1064 nm are all approximately 19 sr. The absolute values of their Angstr?m exponents are very small, which reveals that there is no obvious dependency between extinction coefficient and wavelength. Due to the strong absorption of soot, the lidar ratios of continental aerosols are found to be positively correlated with the content of soot. The continental aerosols have the maximum lidar ratio at 532 nm. The mean value of Angstr?m coefficients is approximately 1.3, and their extinction coefficients decrease with increasing wavelength.

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宋跃辉, 时丽丽, 鲁雷雷, 李仕春, 辛文辉, 闫庆, 华灯鑫. 气溶胶雷达比和波长指数的仿真研究[J]. 量子电子学报, 2016, 33(1): 98. SONG Yuehui, SHI Lili, LU Leilei, LI Shichun, XIN Wenhui, YAN Qing, HUA Dengxin. Simulation of lidar ratios and Angstr m exponents of different aerosols[J]. Chinese Journal of Quantum Electronics, 2016, 33(1): 98.

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