主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2014, Vol. 30 ›› Issue (6): 1-7.doi:

• 论文 •    下一篇

辽宁黑山突发性局地特大暴雨中尺度对流条件和特征

才奎志1 蒋大凯1杨磊1 于增华1孙晓巍2陈宇1 谭世君3   

  1. 1.辽宁省气象灾害监测预警中心，辽宁 沈阳 110166； 2.辽宁省气象台，辽宁 沈阳 110166；辽宁省气象局，辽宁 沈阳 110001
  • 出版日期:2014-12-30 发布日期:2014-12-30

Mesoscale convective conditions of abrupt and local rainstorm and its characteristics at Heishan of Liaoning province

CAI Kui-zhi1 JIANG Da-kai1 YANG Lei1 YU Zeng-hua1 SUN Xiao-wei2 CHEN Yu1 TAN Shi-jun2   

  1. 1. Liaoning Meteorological Disaster Monitoring and Early Warning Centre, Shenyang 110166, China; 2. Liaoning Meteorological Service, Shenyang 110001, China
  • Online:2014-12-30 Published:2014-12-30

PDF (PC)

379

被引次数

6

摘要：

利用常规和加密自动气象站观测资料、卫星和雷达探测资料以及NCEP再分析资料（1°×1°，6h）, 对2013年8 月15-16日辽宁黑山地区特大暴雨的中尺度对流条件和对流系统特征进行探讨。结果表明: 此次强降水由中-β尺度系统引起，短时大暴雨发生在能量舌边缘，地面偏东风和地形强迫抬升作用造成对流单体沿着山脉东侧生成、发展和移动,最终导致持续性对流性强降雨。东北低压冷锋前所激发的中尺度切变和涡旋触发了局地大暴雨。黑山地区上游有两个对流单体生成，向东移动合并影响该地区，移动方向前侧的斜升气流和低质心回波提高了降水效率。

关键词: 能量舌, 中尺度涡旋, 地形强迫, 斜升气流

Abstract:

 Based on data from conventional and automatic weather stations, satellite and radar, and the NCEP reanalysis data (1°×1°, 6 h), the mesoscale convective conditions and convective system characteristics of an extraordinary rainstorm process on August 15-16, 2013 at Heishan of Liaoning province were analyzed. The results show that the severe precipitation process is caused by mesoscale-β convectional systems. The short-term torrential rain area occurs at the edge of energy tongue. Surface eastward wind and topographic force are dominant factors that causes generation, development and movement of convection cells along the east side of mountain, which lead to the continuous and convectional precipitation. The mesoscale wind shear and vortex motivated by the northeast low-pressure cold front trigger the local torrential rain. Two separate convective cells generate in upper reaches of heavy rain areas, and merge together and then influence Heishan County. The oblique ascension airflow in front of echo moving direction and low heart echo both enhance precipitation efficiency.

Key words: High energy tongue, Mesoscale vortex, Terrain force, oblique ascension airflow