J4 ›› 2011, Vol. 29 ›› Issue (2): 240-245.

• 业务技术应用 • 上一篇    下一篇

甘肃陇东黄土高原春末初夏局地暴雨诊断分析

樊晓春1 ,王若升1 ,王位泰2 ,杜丽红1
  

  1. 1. 甘肃省平凉市气象局,甘肃平凉744000; 2. 甘肃省庆阳市气象局,甘肃庆阳745000
  • 收稿日期:2011-01-19 修回日期:2011-03-23 出版日期:2011-06-30 发布日期:2011-06-30
  • 作者简介:樊晓春( 1964 - ) ,女,汉族,甘肃静宁人,高级工程师,主要从事短期天气预报及相关研究. E - mail: fxiaochun@126. com
  • 基金资助:

    中国气象局气象关键技术集成与应用项目“甘肃省降水相态及定量预报技术业务化应用”( CMAGJ2011M53) 资助

Diagnostic Analysis of a Local Heavy Rain Occurred in Loess Plateau of Eastern Gansu

FAN Xiaochun1,WANG Ruosheng1,WANG Weitai2,DU Lihong1   

  1. 1. Pingliang Meteorological Bureau of Gansu Province,Pingliang 744000,China;
    2. Qingyang Meteorological Bureau of Gansu Province,Qingyang 745000,China
  • Received:2011-01-19 Revised:2011-03-23 Online:2011-06-30 Published:2011-06-30

摘要:

用常规观测资料、实时探空资料和雷达资料对2010 年5 月25 ~ 26 日发生在甘肃陇东黄土高原春末初夏的局地暴雨天气过程进行了诊断。结果表明: 此次局地暴雨过程由高空低槽、中低层低涡切变及西南急流、地面倒槽和冷空气共同影响产生; 雷达回波上表现为局地暴雨由混合性降水回波产生,持续时间长,降水效率高; 同时,暴雨量场及V - 3θ 图在暴雨的起报、结束及落区上有很好的预报能力。

关键词: V - 3&theta, 图, 雷达, 春末初夏暴雨, 不稳定参数, 暴雨量场

Abstract:

Based on routine observed data,precipitation from the automatic meteorological station,physical quantity field,radar echoes and V - 3θ digram,the local heavy rain occurred in loess plateau of eastern Gansu on 25 - 26 May 2010 was diagnosed. The results show that the upper - level trough,the middle - low - level vortex shears,southwest jets,ground inverted trough and cold air resulted in this local heavy rain. The mixed precipitation echo formed the local heavy rainfall and the rainfall lasted long. The prediction method based on the the forecasting tools ( heavy rain field and V - 3θ figures) could forecast the beginning,end and area of the heavy rain.

Key words:  local heavy rain, unstable parameter, heavy rain field, V - 3&theta, figures, radar echo

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