The Spectral Ice Habit Prediction System (SHIPS). Part II: Simulation of Nucleation and Depositional Growth of Polycrystals
The Spectral Ice Habit Prediction System (SHIPS). Part II: Simulation of Nucleation and Depositional Growth of Polycrystals
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光谱冰习性预测系统（SHIPS）。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
G. Tripoli
中科院分区：
文献类型：
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作者：
T. Hashino;G. Tripoli
本文提出了一个在云分辨模式中预报多晶体和六方单晶的框架，并通过对一次地形冬季风暴的二维云分辨模拟，讨论了该方案的有效性和对习性分布具有重要意义的物理过程。根据实验室建立的习惯频率图和在不断变化的大气条件下预测的生长历史，模拟了水蒸气沉积生长。预测多晶体在空间分布上的差异明显，中上层多晶体的沉积作用显著。浸泡冻结过程似乎是导致平面多晶形成的关键过程，而均匀冻结过程对于柱状和不规则多晶是重要的。结果表明，冰核浓度通过改变冰核的过饱和度、冻结成核过程的倾向性和沉积物的分布来影响冰核的习性分布。
Abstract This paper proposes a framework to predict polycrystals along with hexagonal monocrystals in a cloud-resolving model and discusses validity of the scheme and physical processes important for habit distribution by implementing 2D cloud-resolving simulations of an orographic winter storm. The vapor depositional growth is simulated based on a habit frequency map constructed in the laboratory and based on a predicted growth history under evolving atmospheric conditions. Differences brought by predicting polycrystals in spatial distribution were apparent, and sedimentation of polycrystals from middle and upper levels was significant. The immersion freezing process appeared to be a key process resulting in the creation of planar polycrystals, while the homogeneous freezing process was found important for columnar and irregular polycrystals. The ice nuclei (IN) concentration was shown to affect habit distribution by changing the supersaturation, tendency of the freezing nucleation processes, and sedimen...