由使用时代过渡期间数据,在南部的中国从 2008 年 1 月 11 日发生了的结冰的雨和暴风雪事件的温度异例被分析。在这个时期期间, diabatic 加热和温度移流引起了温度在西藏的高原上反常地增加。从西藏的高原搬到南部的中国的反常地高的温度起了几个作用。首先,在中国上的上层的副热带的喷气被分成二在纵贯的方向分开,它影响了在南部的中国冻结雨的发展;第二,因为搬到中国的更温暖的空气,一条山脉形成了,它从它的在上游的堵住高度妨碍了冷空气的运输,强迫了冷空气在山脉后面聚在一起,并且便于在事件的以后的时期的严重冷空气爆发;第三,因为降低水平的冷空气和上层的更温暖的空气,倒置层在南部的中国上形成了,它对在南部的中国上的事件的发展导致;并且因为温度异例,最后,相反的风方向出现在底层(在 700 hPa 下面) ,它帮助了温暖潮湿、寒冷干燥的空气的运输到事件区域。
By using ERA-Interim data, the temperature anomaly of the freezing rain and snowstorm event that occurred from Ii to 22 January 2008 in southern China was analyzed. During this period, diabatic heating and temperature advection caused the temperature to increase anomalously over the Tibetan Plateau. The anomalously high temperature moving from the Tibetan Plateau to southern Chin.a played several roles. First, the upper-level subtropical jet over China was split into two parts in the north-south direction, which affected the development of freezing rain in southern China; second, a ridge formed because of the warmer air moving to China, which hindered the transport of cold air from its upstream blocking high, forced the cold air to gather behind the ridge, and facilitated the severe cold air outbreak in the later period of the event; third, an inversion layer formed because of the lower-level cold air and upper-level warmer air over southern China, which was conducive to the development of the event over southern China; and finally, because of the temperature anomaly, opposite wind directions appeared at the lower levels (below 700 hPa), which helped transport of warm-moist and cold-dry air to the event area.