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首页> 外文期刊>Journal of the Atmospheric Sciences >Ice Crystal Linear Growth Rates from -20 degrees to -70 degrees C: Confirmation from Wave Cloud Studies
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Ice Crystal Linear Growth Rates from -20 degrees to -70 degrees C: Confirmation from Wave Cloud Studies

机译：从-20度到-70度的冰晶线性生长速率：来自波云研究的证实

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As a result of recent comprehensive laboratory and field studies, many details have been clarified concerning atmospheric ice crystal habits below -20 degrees C as a function of temperature, ice supersaturation, air pressure, and growth history. A predominance of complex shapes has been revealed that is not reflected in most models, with symmetric shapes often incorrectly emphasized. From the laboratory study, linear (maximum dimension), projected area, and volume growth rates of complex and simple habits have been measured under simulated atmospheric conditions for temperatures from -20 degrees to -70 degrees C. Presently, only a few in situ cases of measured ice crystal growth rates are available for comparison with laboratory results. Observations from the Interaction of Aerosol and Cold Clouds (INTACC) field study of a well-characterized wave cloud at -24 degrees C are compared with the laboratory results using a simple method of habit averaging to derive a range of expected growth rates. Laboratory results are also compared with recently reported wave cloud results from the Ice in Clouds Experiment Layer Clouds (ICE-L) study between -20 degrees and -32 degrees C, in addition to a much colder wave cloud at -65 degrees C. Considerable agreement is observed in these cases, confirming the reliability of the laboratory measurements. This is the first of two companion papers that compare laboratory growth rates and characteristics with in situ measurements, confirming that the laboratory results effectively provide a predictive capability for cloud particle and particle ensemble growth.
机译：最近进行的全面实验室和现场研究的结果，已阐明了有关温度低于20摄氏度，大气过冰，气压和生长历史的函数的低于-20摄氏度的大气冰晶习性的许多细节。已经发现，大多数模型中没有反映出复杂形状的优势，而对称形状经常被错误地强调。根据实验室研究，已经在模拟大气条件下（温度范围为-20摄氏度至-70摄氏度）测量了复杂和简单习惯的线性（最大尺寸），投影面积和体积增长率。目前，仅在少数情况下进行现场测量测量的冰晶生长速率可用于与实验室结果进行比较。将气溶胶和冷云相互作用（INTACC）在-24摄氏度下表征良好的波云的观测结果与实验室结果进行比较，并使用一种简单的习惯平均方法得出了预期的增长率。除了在-65摄氏度下更冷的波动云外，还将实验室结果与最近在-20摄氏度至-32摄氏度之间的冰云实验层云（ICE-L）研究中报告的波动云结果进行了比较。在这些情况下观察到一致，证实了实验室测量的可靠性。这是两篇相伴论文中的第一篇，它们将实验室的增长率和特性与原位测量进行了比较，证实了实验室的结果有效地提供了云粒子和粒子整体增长的预测能力。

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