气溶胶雷达比和波长指数的仿真研究

J4 ›› 2016, Vol. 33 ›› Issue (1): 98-105.

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

西安理工大学机械与精密仪器工程学院, 陕西西安 710048

收稿日期:2015-10-16 修回日期:2015-11-02 出版日期:2016-01-28 发布日期:2016-01-06
通讯作者: 华灯鑫（1964—）浙江人，博士，教授，主要从事激光雷达遥感探测技术及光电检测技术等方面的研究。 E-mail:dengxinhua@xaut.edu.cn
作者简介:宋跃辉（1980—）河北人，博士生，讲师，主要从事偏振激光雷达方面的研究。E-mail：songyuehui@xaut.edu.cn
基金资助:
国家自然科学基金（气溶胶雷达比与波长指数间相关性研究及实验观测，Correlation study and experimental observation of lidar ratio and angstrom coefficient of aerosols, No.61405158，转动拉曼激光雷达大气温度绝对探测技术研究，Research on absolute detection technique of rotational Raman lidar for atmospheric temperature, No.61308106），陕西省自然基金（基于转动拉曼谱型绝对遥感大气温度的激光雷达关键技术理论研究，Theoretical research on key techniques of lidar for absolutely remote-sensing atmospheric temperature based on rotational Raman spectral envelope, No.2013JM5001），陕西省教育厅基金（激光雷达光轴自调节系统的理论算法和技术研究，Theoretical and technical studies of optical axes automatic adjustment in lidar system, No.11JK0909）资助

Simulation of Lidar Ratios and Angstr?m Exponents of Different Aerosols

SONG Yue-hui, SHI Li-li, LU Lei-lei, LI Shi-chun, XIN Wen-hui,YAN Qing, HUA Deng-xin

School of Mechanical and Precision Instrument Engineering, Xi’ an University of Technology, Xi’an 710048, China

Received:2015-10-16 Revised:2015-11-02 Published:2016-01-28 Online:2016-01-06

摘要/Abstract

摘要：

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，深入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355nm，532nm和1064nm波长的激光雷达比均约为19sr，波长指数的绝对值很小，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532nm波长的雷达比最大，在355nm和1064nm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。仿真结果可为气溶胶光散射特性研究提供科学数据，这对揭示气溶胶光散射特性深层规律，精细反演气溶胶光学特性具有非常重要的意义。

关键词: 大气光学；雷达比；波长指数；仿真计算；气溶胶

Abstract:

Based on the theory of Mie scattering and assumption of particle size distribution, lidar ratios and angstr?m exponents of kinds of aerosols are simulated, for studying the relationships between these two parameters and the wavelength of incident light, the size and the refractive index of aerosols. The simulation results show that the lidar ratios of water clouds and fog at 355nm, 532nm and 1064nm are all approximately 19sr, and the absolute value of their angstr?m exponents are very small, revealing 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 532nm, the mean value of Angstr?m coefficients is approximately 1.3, and their extinction coefficients decrease with wavelength. The simulation results can provide important scientific data for studying the scattering properties, which is very important for finding the deep law of aerosols scattering and fine retrieving of the aerosols’ optical characteristics

Key words: atmospheric optics, lidar ratio, angström exponent, simulation calculation, aerosol

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]. J4, 2016, 33(1): 98-105.

SONG Yue-hui, SHI Li-li, LU Lei-lei, LI Shi-chun, XIN Wen-hui,YAN Qing, HUA Deng-xin. Simulation of Lidar Ratios and Angstr?m Exponents of Different Aerosols[J]. J4, 2016, 33(1): 98-105.

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