摘要
The accurate understanding of atmospheric aerosol extinction coefficients is very important for at- mospheric science research. To achieve a fast and simple method for determining the parameters, the selection of optimal forward-scattering angles of atmospheric aerosols is required. In this paper, the authors introduce the detec- tion basis of forward-scattering of atmospheric aerosols, and the authors verify the sensitivity of the phase function to the real part of the complex refractive index. The au- thors use the Jaenicke urban aerosol model to determine that forward-scattering angles near 33° are suitable. However, the optimal forward-scattering angles in North China are between 37° and 40°. Numerical simulation shows that certain types of particle size distribution of newly generated particles and pollution have limited in- fluences on the selection of forward-scattering angles. But the ranges of these insensitive angles shift - 10 degrees for dust intrusion, and the relative deviations of the phase function are less than 5.0% within extra angles of 0° to 3°. This study can serve as a reference for the selection of optimal forward-scattering angles for visibility meters and Present Weather Identifiers （PWIs） in addition to the de- tection of forward-scattering optical properties.
大气的喷雾器扑灭系数的精确理解为大气的科学研究是很重要的。为决定参数完成一个快、简单的方法，大气的喷雾器的最佳的前面散布的角度的选择被要求。在这篇论文，作者介绍察觉基础大气的喷雾器，和作者前面散布验证阶段功能的敏感到复杂折射索引的真实部分。作者使用 Jaenicke 决定前面散布的角度接近 33 獥汵楴杮映潲 ? 楤牵慮? 慶楲瑡潩獮漠 ? ?晲捡 ? 楷摮猠数摥愠摮琠敨戠畯摮牡 ? 慬敹 ? 的城市的喷雾器模型敨杩?
基金
supported mainly by the China Meteorological Administration under Grant GYHY200806031
supported by the Chinese Academy of Sciences under Grant XDA05040302
