摘要
介绍了一种利用测量得到的大气能见度获取多波长气溶胶光学特性(主要探讨气溶胶的消光系数、散射系数和吸收系数)的新方法。首先,由能见度求出波长0.55μm的大气消光系数,在减去大气分子的消光系数后得到0.55μm气溶胶的消光系数,使用Mie散射理论求出气溶胶粒子的数密度;因为同一时间大气状态下气溶胶的数密度是不变的,所以再次使用Mie散射理论即可得到其他波长下气溶胶的光学特性。以1.06、1.536、3.75μm为例,给出了合肥2003年近地面层的气溶胶光学特性,该方法对于研究大气环境和大气中光传输模式具有重要意义。
A new method is proposed for certain wavelength aerosol optical characteristics （e.g extinction coefficient, scattering coefficient and absorption coefficient） by using the measurement data of a visibility meter. Firstly, 0.55 μm atmospheric extinction coefficient can be resolved by using visibility, when it subtracts the extinction coefficient of atmospheric molecule, 0.55 μm aerosol extinction coefficient can be obtained, and the number density of aerosol can be calculated by using Mie theory. Because the number density of aerosol is constant at the same time and atmospheric condition, so some other wavelength aerosol optical characteristics can be obtained by using Mie theory. This paper provided the aerosol optical characteristic of 0-2 km in 2003 in Hefei, at the wavelength of 1.06,1.536 and 3.75 μm, which is important for research on atmospheric environment and light transmission mode in atmosphere.
出处
《红外与激光工程》
EI
CSCD
北大核心
2007年第2期265-269,共5页
Infrared and Laser Engineering
基金
国家863计划激光领域某专题资助项目
关键词
大气光学
气溶胶
散射系数
吸收系数
Atmospheric optics
Aerosol
Scattering coefficient
Absorption coefficient
