鲁西南一次强降水天气过程特征分析(英文)

Characteristic Analysis of One Heavy Precipitation Synoptic Process in the South-west of Shandong Province

[目的]分析鲁西南一次强降水天气过程的形成机制。[方法]利用环流形式资料、物理量场资料、雷达回波演变数据以及数值预报检验,对2010年7月16~17日鲁西南一次强降水天气进行分析,探讨此次天气过程的形成机制。[结果]在我国东部环流径向度较大的情况下,蒙古地区高空冷涡分裂冷空气南下,从西侧冲击副高边缘西南气流。冷涡、副热带高压边缘切变线是此次强降水天气过程的主要影响系统,西南急流对暖湿气流的输送为较强降水的产生提供了水汽条件,高低空急流和低空切变线为降水的产生提供了动力抬升作用。[结论]该研究为强降水预报提供一定的参考依据。

[Objective] This paper aimed to explore the formulation mechanism of one heavy precipitation synoptic process in the south-west of Shandong Province from June 16th to June 17th in 2010. [Method] Based on information of circulation forms and physical quantity field, data of radar echo evolution and numerical prediction test, a heavy precipitation synoptic process in southwest Shandong during June 16th to June 17th in 2010 was analyzed to explore the formation mechanism of this synoptic process. [Result] The results showed that under the condition of relatively large circulation radial degree in eastern China, high-altitude cold vortex in Mongolia split, moved towards the south and impacted southwest air current at the edge of subtropical high from the west side. Cold vortex and shear line at the edge of subtropical high were the major impact system for the formulation of heavy precipitation synoptic process. The transportation of the southwest jest stream to the warm moist airflow provided water vapor conditions for the heavy precipitation, the high and low level jet stream and low level shear line provided strong dynamic lifting for this precipitation. [Conclusion] This study provided reference for heavy precipitation forecast.