Production of Ice Particles in Clouds Due to Aircraft Penetrations
Production of Ice Particles in Clouds Due to Aircraft Penetrations
复制标题
由于飞机的穿透而在云中产生冰粒
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
P. Hobbs
中科院分区：
文献类型：
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作者：
A. Rangno;P. Hobbs
本文提出的证据表明，飞机穿过过冷云层时会产生高浓度的冰粒（在一种情况下，在−8°C时大于1000 L−1）。这些飞机产生的冰粒（APIP）的特点是，最初，它们的高浓度和非常均匀的尺寸分布。冰粒包含在圆柱状体积的空气中，该圆柱状体积的空气最初沿着飞行器的飞行轨迹定向;在经过5分钟的时间之后，圆柱体的直径为10300 m。讨论了APIP的可能机制。鉴于这些调查结果，在解释有关飞机穿透云层的数据时必须谨慎。以前的一些观测结果显示，云层中冰粒浓度异常高，这似乎是由于APIPs造成的。此外，由于APIPs模拟了故意人工催化所产生的一些效果，它可能会使云催化实验的评估复杂化。
Abstract Evidence is presented that the passage of an aircraft through supercooled clouds can produce high concentrations of ice particles (> 1000 L−1 at −8°C in one case). These Aircraft Produced Ice Particles (APIPs) are characterized, initially, both by their high concentration and very uniform size distribution. The ice particles are contained in a cylindrical-like volume of air that is initially oriented along the flight track of the aircraft; the diameter of the cylinder is ∼300 m after 5 min of elapsed time. Possible mechanisms for APIPs are discussed. In view of these findings, care must be taken in the interpretation of data on clouds that have been penetrated by aircraft. It seems likely that some previous observations of abnormally high concentrations of ice particles in clouds were due to APIPs. Also, since APIPs mimic some of the effects produced by deliberate artificial seeding, it could complicate the evaluation of cloud seeding experiments.