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Optical properties of contrail-induced cirrus: Discussion of unusual halo phenomena

机译:转换轨迹引起的卷云的光学性质:讨论不寻常的光晕现象

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Photographs of a 120 degrees parhelion and a 22 degrees parhelion within persistent contrails are presented. These phenomena result from hexagonal plate-shaped ice crystals oriented horizontally with diameters between 300 mu m and 2 mm. From our observations and reinvestigation of previous reports, we conclude that a subset of the population in persistent contrails can consist of highly regular, oriented, hexagonal plates or columns comparable to the most regular crystals in natural cirrus clouds. measured ambient humidities below the formation conditions of natural cirrus. azimuthal variability of the scattering phase function impacts the radiative transfer through persistent contrails. (C) 1997 Optical Society of America.
机译:呈现了持续凝结尾迹中120度和24度的照片。这些现象是由水平方向直径在300微米至2毫米之间的六角形板状冰晶引起的。根据我们对先前报告的观察和再研究,我们得出结论,持久凝结尾迹中的一部分人口可以由高度规则的,定向的,六边形的板块或柱子组成,可与天然卷云中最规则的晶体相媲美。低于自然卷云形成条件的环境湿度。散射相位函数的方位角可变性通过持续的凝结尾迹影响辐射传递。 (C)1997年美国眼镜学会。

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