[1]苏兆达,赖雨薇,韦覃武,等.一次边界层急流触发的大范围暴雨过程诊断分析[J].气象研究与应用,2015,36(04):53-58.
　Su Zhaoda,Lai Yuwei,Wei Qinwu,et al.The Diagnostic Analysis of a Large-scale Rainstorm Process Caused by Boundary Layer Jet[J].Journal of Meteorological Research and Application,2015,36(04):53-58.
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一次边界层急流触发的大范围暴雨过程诊断分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第36卷
期数:
2015年04期
页码:
53-58
栏目:
天气气候
出版日期:
2015-12-23

文章信息/Info

Title:
The Diagnostic Analysis of a Large-scale Rainstorm Process Caused by Boundary Layer Jet
作者:
苏兆达1;  赖雨薇1;  韦覃武2;  李菁3
1. 南宁市气象局, 广西南宁 530022;
2. 上林县气象局, 广西上林 530500;
3. 广西气象台, 南宁 530022
Author(s):
Su Zhaoda1;  Lai Yuwei1;  Wei Qinwu2;  Li Jing3
1 Nanning Municipal Meteorological Service, Nanning 530029;
2 Shanglin County Meteorological Service, Nanning 530500;
3. Guangxi Meteorological Observatory, Nanning 530022
关键词:
边界层急流; 暴雨; 诊断分析; 广西
Keywords:
boundary layer jet; rainstorm; diagnostic analysis; Guangxi
分类号:
P458.1+21.1
摘要:
利用常规气象资料、雷达资料和数值预报产品资料,采用天气动力诊断分析方法,对2015年5月22-23日广西中部大范围暴雨过程的成因进行分析,结果表明:这次暴雨过程是在中高纬两槽一脊环流背景下,切变线快速移入,并与西南急流迎面相遇,发生强烈抬升凝结作用造成的;边界层西南急流为暴雨提供了充足的暖湿水汽、不稳定能量和抬升条件;低空850hPa和925hPa切变线的南北分离、间距适宜,两者之间区域是暴雨的主要落区;低层辐合、中高层辐散及整层强烈的上升运动有利于大量暖湿气流在桂中一带辐合抬升凝结;雷达资料的应用对暴雨预报和中尺度天气系统的识别和跟踪有重要参考价值。
Abstract:
Based on the conventional observation data and the radar data and numerical forecasting products, a heavy rain storm weather process appearing in central Guangxi from May 22 to 23, 2015 were analyzed by synoptic dynamic diagnostic analysis. The results show that:under the two-toughs-and-oneridge circulation in middle-high latitude, this rain storm was caused by strong lifting condensation, which was formed by meeting of shear line and southwest jet. The southwest jet of boundary layer provided adequate warm vapor, unstable energy and lifting dynamic; the area of rainstorm appearing is the place between low-level 850hPa and shear line 925hPa separating. Lower convergence and upper divergence and the whole-level strong upward movement make for lifting condensation of warm moist air flows in central area of Guangxi; The application of radar data is significant reference value for rainstorm forecast and recognition of mesosacle weather system.

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备注/Memo

备注/Memo:
收稿日期:2015-05-17。
基金项目:广西自然科学基金(2013GXNSFAA019280)、南宁市科技局科研项目(20153257)、广西气象局重点科研项目(桂气科201302)和华南区域气象中心科技攻关项目(GRMC2014M12)共同资助
作者简介:苏兆达(1978-),男,广西桂林人,工程师,主要从事中短期、短时天气预报工作。Email:suada@126.com
更新日期/Last Update: 1900-01-01