-15 ℃附近雪晶生长中边缘增强不稳定性的观测
Observations of an Edge-enhancing Instability in Snow Crystal Growth near -15 C
摘要：
我们目前的观察板状雪晶的形成提供了证据的边缘增强晶体生长的不稳定性。当描述冰棱柱刻面的生长的冷凝系数随着刻面的宽度变窄而增加时，这种不稳定性就会出现。再加上粒子扩散的影响，这种现象导致薄板状晶体从较厚的棱镜发展，随着它们的生长，将板的边缘锐化到微米或亚微米尺寸。这种锐化效应在很大程度上是由接近-15 ℃的水蒸气形成薄板状冰晶的原因，这是雪晶形态图中的主要特征。其他刻面晶体材料可表现出类似的形态生长不稳定性，其促进板状或针状结构的扩散限制生长。
英文摘要：
We present observations of the formation of plate-like snow crystals that provide evidence for an edge-enhancing crystal growth instability. This instability arises when the condensation coefficient describing the growth of an ice prism facet increases as the width of the facet becomes narrower. Coupled with the effects of particle diffusion, this phenomenon causes thin plate-like crystals to develop from thicker prisms, sharpening the edges of the plates to micron or sub-micron dimensions as they grow. This sharpening effect is largely responsible for the formation of thin plate-like ice crystals from water vapor near -15 C, which is a dominant feature in the snow crystal morphology diagram. Other faceted crystalline materials may exhibit similar morphological growth instabilities that promote the diffusion-limited growth of plate-like or needle-like structures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
