摘要
利用常规气象资料和T213、自动站、加密雨量站等资料,对2011年7月23-25日福建省一次强对流天气过程及其影响进行分析。结果表明,高空冷涡中冷空气沿海岸线扩散南下,侵袭副热带高压,触发了强对流天气,产生强降水和强雷电。中尺度辐合和冷平流触发此次强对流天气,其过程具有中尺度特征。中尺度辐合线的强度变化及其移动,与强降水的强度及落时、落区变化有较好的对应关系。
By using conventional observation data, T213, automatic station and encryption rainfall stations files, an analysis has been conducted on a strong convective weather process occurred in Fujian Province from 23th to 25th in July, 2011 and its influence. It has been proved that the cold air in upper cold vortex spread down southward along the coast, hit the subtropical anticyclone, caused the strong convective weather process and finally generated great precipitation and thunder. Mesoscale convergence and cold advection led to the strong convective weather. This process had obvious mesoscale feature. Strength and movement of the mesoscale convergence line had a pretty precise correspondence relationship with strength, falling time and falling area changing of the great precipitation.
出处
《亚热带农业研究》
2013年第1期41-45,共5页
Subtropical Agriculture Research
关键词
暴雨
切变线
高空冷涡
中尺度辐合线
rainstorm
shear line
upper cold vortex
mesoscale convergence line
