[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 o...[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.展开更多
文摘[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.