Microscopic Observations of Riming on an Ice Surface Using High Speed Video
Microscopic Observations of Riming on an Ice Surface Using High Speed Video
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DOI：
10.1016/j.atmosres.2016.10.014
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发表时间：
2017-03
影响因子：
5.5
通讯作者：
C. Emersic;P. Connolly
中科院分区：
文献类型：
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作者：
C. Emersic;P. Connolly
用高速视频观察了冰面上微观液滴的边缘事件。观察发现，在温度高于- 15°C的平坦冰面上，液滴扩散的倾向更大，随后，液滴在流动中形成越来越大的尖塔，允许液滴碰撞和更小的液滴的球形冻结。洞察哈雷特-莫索普过程的实验室观测之间的差异，提供了有关液滴传播的性质与撞击前的河表面结构有关。对空气速度和液滴在冰面上撞击速度之间的差异的观测可能会影响对雾凇实验室研究的解释，并可能解释最近对过冷层云中高二次产冰率的观测。
Microscopic droplet riming events on an ice surface have been observed using high speed video. Observations included greater propensity for droplet spreading at temperatures higher than − 15 °C on flatter ice surfaces, and subsequently, the formation of growing rime spires into the flow, allowing glancing droplet collisions and more spherical freezing of smaller droplets. Insight into differences between laboratory observations of the Hallett-Mossop process is offered, relating to the nature of droplet spreading associated with the structure of the rimer surface prior to impact. Observations of a difference between air speed and resulting droplet impact speed on an ice surface may affect interpretations of riming laboratory studies, and may explain recent observations of a high secondary ice production rate in supercooled layer clouds.