利用HITRAN资料研究黑碳和沙尘气溶胶粒子的光学特性  

Optical characteristics of black carbon and dust aerosols with HITRAN data

作　　者：葛觐铭[1] 刘玉芝[1] 黄建平[1] 苏婧[1] 李积明[1] 闭建荣[1] 

机构地区：[1]兰州大学大气科学学院,甘肃兰州730000

出　　处：《应用光学》2009年第2期202-209,共8页Journal of Applied Optics

基　　金：科技部973项目(2006CB403705);国家自然科学基金重点项目(40730949);国家自然科学基金(40633017)

摘　　要：在IDL程序语言中实现Mie理论的数值算法,利用HITRAN资料提供的气溶胶粒子复折射指数,计算分析了沙尘、黑炭2种气溶胶粒子在不同半径(1μm,2.5μm和10μm)时,对波长为400nm和860nm光的散射效率以及散射相函数矩阵元素。结果表明:黑炭与沙尘有明显的光学性质差别,沙尘粒子不仅散射效率大于黑碳,而且后向散射比黑碳粒子强。2种粒子对400 nm和860nm太阳光的偏振也不同,可以利用此特性鉴别这2种气溶胶。The numerical algorithm of Mie theory was realized in IDL. The scattering etttctency and phase matrix elements of black carbon and dust aerosols at 400 nm and 860 nm wavelength were calculated when their radius were 1 μm, 2.5μm and 10μm. The results show that the optical characteristics of the black carbon and dust are significantly different, and both the scattering efficiency and backward scattering of the dust are greater than those of the black carbon. Since the lighting polarizations of the two aerosols are different at the sun light of 400 nm and 860 nm, both the aerosols can be distinguished with the characteristics.

关 键 词：黑碳粒子 沙尘粒子 气溶胶 HITRAN MIE理论 

分 类 号：O436.2[机械工程—光学工程]