摘要
利用常规气象观测资料及NCEP/NCAR1°×1°再分析资料,对2015年5月18—19日发生在江西南部的区域性大暴雨天气过程的雨情及影响系统进行了分析。结果表明,中高纬度地区东北冷涡东移南调,引导其南侧高空槽东移,并引发弱冷空气南下;副热带高压偏强且维持在18°N附近。弱冷空气与副热带高压北侧西南急流持续交汇有利于江西南部地区出现大暴雨的稳定环流型。副热带高压西北侧旺盛的水汽输送及辐合在江西南部的维持为大暴雨的发生提供了充足的水汽条件。多尺度系统相互作用导致江西南部的东北部局地较强的静止锋锋生作用是此次大暴雨天气过程发生的主要天气学成因。
Based on the conventional meteorological observation data and NCEP/NCAR rcanalysis data, the severe rainstorm process happened in southern Jiangxi during 18 -19 May 2015 was analyzed in this paper. The results indicated that,the north-east cold vortex in the high latitude moved eastward, leading the south side of the trough moving eastward and the weak coldair to the southern China. The subtropical high was strong and maintained in the vicinity of 18°N. The continuous convergencebetween weak cold air and the southwest jet on north side of the subtropical high wheavy rain in southern Jiangxi. The transportation and convergence of exuberant water vapor on the northwest tropical high provided adequate moisture for the heavy rain. The interaction of multi-scale systemstrong stationary front, which was the main causes of the heavy rain.
出处
《气象与减灾研究》
2017年第1期15-21,共7页
Meteorology and Disaster Reduction Research
基金
2016年江西省气象局面上项目"江西省汛期暴雨分区预报模型研究"
2016年江西省气象局高层次培育项目"我国南岭区域汛期降水可预报性研究"
中国气象局预报员专项(编号:CMAYBY2016-037)
2015年江西省气象局重点项目"基于集合预报产品的降尺度乡镇精细化预报研究"
关键词
区域性暴雨
华南静止锋
锋生作用
江西南部地区
regional rainstorm
southern China stationary front
frontogcncsis
southern Jiangxi