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Position: Home > Articles > Analysis of Mesoscale Characteristics of a Heavy Rain Process Induced by the Southwest Vortex Journal of Anhui Agricultural Sciences 2015 (1) 137-139+178

一次西南涡暴雨过程中尺度特征分析

作  者:
聂云;周继先;杨胜海
单  位:
贵州省思南县气象局;贵州省天柱县气象局;贵州省三穗县气象局
关键词:
西南涡;暴雨;中尺度特征
摘  要:
运用2008年7月20~24日fnl资料和全国723站降水资料对我国2008年7月一次西南涡暴雨过程进行大尺度环流分析和降水运动的中尺度诊断分析。结果表明,此次西南涡暴雨过程500 h Pa呈两槽两脊型,水汽来源于孟加拉湾,24日西南涡经山东半岛出海暴雨过程结束;中尺度诊断分析表明,暴雨发生在辐合上升运动区且具有一定的滞后性,LI<-2 K区域不稳定能量释放触发区域强降水,高湿区随暴雨系统向下游移动为其提供充足的水汽,进而导致此次西南涡暴雨的产生并维持较长时间。
译  名:
Analysis of Mesoscale Characteristics of a Heavy Rain Process Induced by the Southwest Vortex
作  者:
NIE Yun;ZHOU Ji-xian;YANG Sheng-hai;Sansui County Meteorological Bureau;Sinan County Meteorological Bureau;Tianzhu County Meteorological Bureau;
关键词:
Southwest vortex;;Rainstorm;;Mesoscale characteristics
摘  要:
Using fnl data from Jul. 20- 24,2008 and 723 precipitation data,large-scale circulation analysis and mesoscale diagnosis analysis was conducted on a heavy rain process induced by the southwest vortex. The results showed that 500 h Pa of the heavy rain process indicated two slot two ridge type,the source of water was from the bay of Bengal; mesoscale diagnosis analysis showed that rainstorm occurred in convergence ascending motion area and had a certain lag. The release of unstable energy in LI <- 2K region caused regional strong rainfall,high humidity areas moved to downstream with the storm system to provide sufficient water vapor,then led to the rainstorm and maintained a longer period of time.

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