研究冰冻天气的特征对于更好的认识冰冻天气,提高此类天气的预警预报能力,从而达到防灾减灾有重要意义。利用2011~2013年间中国民航机场的一小时或半小时一次的例行观测和特殊观测资料,分析了冻雨、冻毛毛雨和冻雾天气的时空分布、持续时间和气象条件等特征。研究结果表明:我国大部分地区均会发生冰冻天气。冻雨和冻毛毛雨的频发区与其持续时间较长区比较一致,而冻雾的少发区,其持续时间也可能较长。我国冰冻天气最容易在冬季(12~2月)发生,在1月出现的比例最高;在凌晨[00~07时(当地时间,下同)]出现频率相对较高,午后(13~14时)出现频率最低。一次冰冻天气的持续时间一般不超过2个小时。温度在-3~-1℃,露点温度在-4~-1℃,温度露点差在0~1℃时冰冻天气发生的频率最大。出现冰冻天气时的风向以东北风和北风为主,而平均风速在2~3.9 m s-1时冻雨和冻毛毛雨发生的频率最大。我国冻雨和冻毛毛雨发生时,同时常会有雾或轻雾;冻雾出现时,一般不会伴随其他天气
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