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利用Micaps地面、高空资料及来自NCEP/NCAR逐6小时再分析资料,分析2015年11月23日飞机增雨作业过程中出现的飞机积冰过程,并结合河南2015-2016年飞机积冰事例,对比三种积冰判别法的准确性。结果表明:形成此次积冰过程的天气背景是低槽冷锋;充足的水汽和适宜的温度有利于积冰的形成;国际民航组织推荐的飞机积冰判别指数可以较好反映积冰发生区域及强度,假霜点判别法预报程度偏重、分级不明显,温湿度经验判断法效果最差。
Analyzing the ice accretion process of the aircraft during the precipitation increase operation on November 23, 2015, based on the Micaps ground and upper air data and the 6-hour reanalysis data from NCEP / NCAR, and combining with the case of aircraft ice accretion in Henan 2015-2016, Compare the accuracy of three kinds of ice accretion method. The results show that the weather background of the ice formation process is a low-trough cold front. Sufficient water vapor and appropriate temperature are favorable for the formation of ice formation. The ICAO-recommended ice accumulation discrimination index can better reflect the ice accretion area and Strength, fake frost point discriminant method to forecast the degree of emphasis, grading is not obvious, temperature and humidity experience to determine the worst effect.