The Theoretical Basis for the Parameterization of Ice Crystal Habits: Growth by Vapor Deposition
The Theoretical Basis for the Parameterization of Ice Crystal Habits: Growth by Vapor Deposition
复制标题
冰晶习性参数化的理论基础：气相沉积生长
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
D. Lamb
中科院分区：
文献类型：
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作者：
Jen‐Ping Chen;D. Lamb
摘要 表面动力学和气相扩散效应的理论分析允许以自洽的方式指定冰晶的生长速率和习性。该分析利用了这样一个事实：棱镜和基面的凝结系数之间的差异决定了主要晶体习性，而蒸汽密度的空间变化则有助于次要习性。理论分析得出的参数化方案产生了 a 和 c 轴长度之间的幂律关系，该关系与根据 -30° 至 0°C 温度范围的观测数据得出的早期经验公式相匹配。通过在微物理模型中应用这种自适应参数化，根据冰颗粒的质量和形状对冰颗粒进行分类，结果表明，如果晶体经历空气温度及其固有生长习性的显着变化，则可能会出现幂律关系的偏差。一个质量...
Abstract A theoretical analysis of surface kinetic and gas-phase diffusional effects permits the growth rates and habits of ice crystals to be specified in a self-consistent way. The analysis makes use of the fact that the difference between the condensation coefficients of the prism and basal faces determines the primary crystal habits, whereas the spatial variations of the vapor density contribute to the secondary habits. The parameterization scheme that results from the theoretical analysis yields a power law relationship between the a and c axial lengths that matches earlier empirical formulas derived from observational data for the temperature range of −30° to 0°C. Through application of this adaptive parameterization in a microphysical model that categorizes ice particles according to both their masses and shapes, it is shown that deviations from the power law relationship may develop if the crystals experience significant variations in the air temperature and in their inherent growth habits. A mass...