Faceted snow crystals
Faceted snow crystals
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多面雪晶
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
J. Hallett
中科院分区：
文献类型：
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作者：
J. Hallett
彩色光晕是由固体六角形雪晶折射光线产生的，雪晶的小面定义良好，尺寸足够大(>；20μm)，以避免明显的衍射效应。大的晶体随着它们的主轴水平下落，并通过涡流的脱落而振荡，形成弧形。这种晶体的形成强烈依赖于不断变化的生长条件，特别是冰的过饱和度、气压、温度和热辐射环境。提出了形成这种晶体的最佳气象条件。
Colored halos are produced by refraction of light by solid hexagonal snow crystals with well-defined facets whose size is sufficiently large (>20 μm) to avoid significant diffraction effects. Large crystals fall with their major axes horizontal and oscillate by eddy shedding to give dogs and arcs. The formation of such crystals is strongly dependent on changing growth conditions, particularly ice supersaturation, air pressure, temperature, and the thermal radiation environment. Optimum meteorological conditions for formation of such crystals are suggested.