摘要
利用LAPS资料,结合地面和高空常规观测资料、雷达资料,从环流背景、影响系统、物理量场等方面对2013年6月27—29日连续性暴雨过程进行分析,得出结论:(1)LAPS输出的产品时效性好,分辨率高,产品多样化,更好地丰富了对天气过程分析的方法,对中尺度天气具有非常明确的解释能力,有利于从更深层次分析天气发生的成因;(2)高纬有阻高建立,低纬度地区受南亚高压控制,系统稳定少动,中纬度地区不断有短波槽东移,引导冷空气南下,副高西北侧强盛的西南气流将暖湿空气源源不断地输入江西中北部,在此形成冷暖交汇,稳定的形势有利于形成连续性暴雨天气;(3)副高西北侧的强西南急流中,风向风速在江西中北部辐合,为强降水提供了抬升条件,并且急流的脉动与降水强度的变化有着密切关系,强降水往往出现在凌晨前后,下午至晚上逐渐减弱。
Based on LAPS data,combined with ground and high-altitude conventional observation data and radar data,the continuous rainstorm process from June 27 to 29,2013 was analyzed from the aspects of circulation background,influence system,physical quantity field,etc.,and the following conclusions were drawn:(1)LAPS output products have good timeliness,high resolution,and diversified products,which better enrich the methods of weather process analysis,and have a very clear interpretation ability for mesoscale weather,It was helpful to analyze the cause of weather from a deeper level;(2)The high latitudes hinder the establishment of the high latitudes.The low latitudes were controlled by the South Asia High,and the system was stable and less dynamic.There were short wave troughs moving eastward in the middle latitudes,leading the cold air to the south.The strong southwest airflow on the northwest side of the subtropical high continuously transports warm and humid air to the north central Jiangxi,where cold and warm air converge.The stable situation was conducive to the formation of continuous rainstorm weather;(3)In the strong southwest jet stream on the northwest side of the subtropical high,the wind direction and wind speed converge in the north central part of Jiangxi Province,providing lifting conditions for heavy rainfall,and the fluctuation of the jet stream was closely related to the change of rainfall intensity.Strong rainfall often occurs around the early morning,and gradually weakens from afternoon to evening.
作者
吴菲菲
毕晨
Wu Fei-fei(Nanchang Meteorological Bureau,Nanchang,Jiangxi 330038)
出处
《农业灾害研究》
2023年第3期104-106,共3页
Journal of Agricultural Catastrophology
基金
江西省气象局面上项目“井冈山森林气象火险预测模型及火险等级区划研究”(JX2018M16)。
