J4 ›› 2008, Vol. 25 ›› Issue (1): 48-52.

• 论文 • 上一篇    下一篇

多普勒雷达对一次阵风锋的三维结构研究

王振国1卓鸿2李春虎3刘爱梅2杨芙蓉2   

  1. 1.甘肃省甘南州气象局,甘肃合作747000;2.济南市气象局,山东济南250001;3.山东省气象局.山东济南250001
  • 收稿日期:2006-05-08 修回日期:2006-12-17 出版日期:2007-03-31 发布日期:2007-03-31
  • 作者简介:王振国(1966一),男,甘肃天水人,工程师,主要从事天气预报研究和业务管理工作.E—mail:w—zg_660918@163.tom
  • 基金资助:

    山东省气象局重点科研项目(2005sdqxzl7)资助

Analysis of a Gust Front 3——D Structure by Using Doppler Radar Data

WANG Zhenguo1ZHUO Hong2, LI Chunhu 3,LIU Aimei 2,YANG Furong2   

  1. 1.Gannan Meteorological Bureau of Gansu Province,Hezuo 747000,China;2.Ji’nart Meteorological  Bureau ofs~.aong Province.Ji’nart 250001,China;3.Shandong ProvincialMeteorologicalBureau,Ji’nart 250001,China
  • Received:2006-05-08 Revised:2006-12-17 Online:2007-03-31 Published:2007-03-31

摘要:

通过对济南地区一次春季阵风锋的多普勒雷达资料分析,反演出典型的密度流外流边界(阵风锋)的特征,在雷达回波图上表现为一条狭窄的弧状强回波带,强回波带的后方再发展出宽大较弱的回波区。体扫的各仰角速度场显示出阵风锋合理的空间结构;在雷达回波上阵风锋的长度表现为低仰角长,高仰角短,而距离表现为低仰角远,高仰角近。速度垂直剖面上存在典型的中层径向辐合MARC,高度大约在2.5—7 km之间,反映出强对流存在明显的后方中层人流。随着仰角的增大,可以分析出阵风锋是近地面现象。

关键词: 春季阵风锋, 多普勒雷达, 空间结构, 中层径向辐合MARC

Abstract:

A spring gust front occurred on April 17,2003 over Ji’nan was analyzed by using Doppler radar data.A typical density cur-leat outt]ow boundary(gust front)characteristic was retrieved,which presented a strong nalTow bow echo belt before a wide weak echo region on Doppler radar echo images.Diferent elevation velocity fields showed a reasonable spatial structure of the gust front.The characteristic of the gust front on Doppler Radar echo images presented the length was long(short)at low(high)elevation and the dis—tance was far(near)at low(high)elevation.A typical midaltitude radial convergence(MARC)at the height of2.5—7 km on velocity vertical profileindicated an evident rear middle—levelinflow.A phenomenonthatthegustfrontwas near the groundwas foundwith radar elevation increase.

Key words: spring gust front, Doppler radar, spatial structure, MARC

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