中文摘要：

在这份报纸，作者分析伪静止的前面，表面条件，和在长江的中间降低的活动范围上与一个结冰降水事件联系的大气的层化过程，特别在在 2 月三月期间的 Dabie 山 2009。冻结降水的长持续时间被静止、异常的摘要的天气模式首先引起，例如在北分支的一个堵住的高压力和在 westerlies 的南部的分支的马槽，它从南方从北中国和温暖的潮湿导致了相遇寒冷空气。east-west-oriented，伪静止的前面(或砍线) 在华中发现主要负责生产降水。温暖的层和近表面的冻结的层沿着前面地区位于更低的对流层。尽管温暖的层(> 0

英文摘要：

In this paper, the authors analyze the quasistationary fronts, surface conditions, and atmospheric stratification processes associated with a freezing precipitation event over the middle-lower reaches of the Yangtze River, especially in the Dabie mountain during February-March 2009. The long duration of freezing precipitation was primarily caused by stationary and anomalous synoptic weather patterns, such as a blocking high pressure in the northern branch and a trough in the southern branch of the westerlies, which resulted in the encounter cold air from northern China and warm moisture from the south. The east-west-oriented, quasi-stationary front （or shear line） found in central China was mostly responsible for producing the precipitation. The warm layer and nearsurface frozen layer were located in the lower troposphere along the front zone. Although the warm layer （〉 0℃） existed along the whole front, a surface temperature less than 0℃ appeared only over the lower-middle reaches of the Yangtze River, especially in the Dabie mountain. Therefore, the surface temperature was the main influencing factor, as the freezing precipitation only happened over the Dabie mountain.