Investigation of optical and radiative properties of atmospheric dust aerosols

Atmospheric Environment. Part A. General Topics Pub Date : 1993-11-01 DOI:10.1016/0960-1686(93)90023-R

Irina Sokolik , George Golitsyn

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引用次数: 92

Abstract

A dust aerosol optical model is proposed as a result of analysis of the data obtained during the U.S.S.R.-U.S. experiment in Tadzhikistan, 1989. The model consists of spectral dependencies of the single scattering albedo, ω, the asymmetry parameter of the scattering phase function, g, and of possible values of the aerosol optical thickness, τ, for background conditions and for dust storms. This model and available published optical models of dust aerosols were used to perform simulations of radiative forcing in the dusty atmosphere. Results obtained are compared with corresponding results for Saharan aerosol. It is shown that atmospheric dust strongly decreases the total radiative balance of the underlying surface and at the same time induces general warming of the underlying surface-atmosphere system due to a decrease in the system albedo over the arid zones. The calculated heating/cooling rates in the atmosphere are analysed together with data from aerological soundings and radiation measurements.

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大气尘埃气溶胶光学和辐射特性的研究

通过对1989年苏联-美国在塔吉克斯坦进行的试验资料的分析，提出了一种粉尘气溶胶光学模型。该模型包括单次散射反照率ω、散射相函数的不对称参数g以及背景条件和沙尘暴下气溶胶光学厚度τ的可能值的光谱依赖关系。该模型和现有的已发表的粉尘气溶胶光学模型被用于模拟多尘大气中的辐射强迫。所得结果与撒哈拉气溶胶的相应结果进行了比较。结果表明，大气尘埃强烈地降低了下垫面总辐射平衡，同时由于干旱区下垫面-大气系统反照率的降低，导致下垫面-大气系统普遍变暖。计算出的大气加热/冷却速率连同气象探测和辐射测量的数据一起进行分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Atmospheric Environment. Part A. General Topics

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