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 ›› 2018, Vol. 34 ›› Issue (3): 18-27.doi: 10.3969/j.issn.1673-503X.2018.03.003

• 论文 • 上一篇    下一篇

辽宁省3次暴雪天气过程雷达特征对比分析

胡鹏宇1, 徐爽2, 陈传雷1, 杨磊1, 纪永明1, 孙丽3   

  1. 1. 辽宁省气象灾害监测预警中心, 辽宁 沈阳 110166;
    2. 沈阳市气象局, 辽宁 沈阳 110168;
    3. 辽宁省人工影响 天气办公室, 辽宁 沈阳 110166
  • 收稿日期:2017-07-14 修回日期:2017-12-06 出版日期:2018-06-30 发布日期:2018-06-30
  • 通讯作者: 陈传雷,E-mail:ln_ccl@163.com。 E-mail:ln_ccl@163.com
  • 作者简介:胡鹏宇,男,1990年生,助理工程师,主要从事短临预报预警研究,E-mail:hu471064185@163.com。
  • 基金资助:
    中国气象局预报员专项(CMAYBY2017-015)和辽宁省气象局科学技术项目(BA201809)共同资助。

Comparative analysis of the radar echo characteristics of three heavy snowfall events in Liaoning province

HU Peng-yu1, XU Shuang2, CHEN Chuan-lei1, YANG Lei1, JI Yong-ming1, SUN Li3   

  1. 1. Liaoning Meteorological Disaster Monitoring and Early Warning Center, Shenyang 110166, China;
    2. Shenyang Meteorological Service, Shenyang 110168, China;
    3. Weather Modification Office in Liaoning Province, Shenyang 110166, China
  • Received:2017-07-14 Revised:2017-12-06 Online:2018-06-30 Published:2018-06-30

摘要: 利用欧洲中心(European Center for Medium-Range Weather Forecasts,ECMWF) ERA-interim再分析资料、常规气象观测资料及多普勒雷达资料,对辽宁省境内发生的2007年"0304"、2009年"0212"和2017年"0221"共3次暴雪过程进行对比分析,主要研究3次暴雪过程的大尺度环流背景条件、气团、水汽来源及雷达回波和雷达参量特征的异同。结果表明:辽宁省3次暴雪过程均为受高空槽影响产生的,高空低槽配合地面冷锋或倒槽,导致动力抬升条件增强;来自不同水汽源地的气团和冷暖气团的交绥是暴雪过程增强的关键因素;降雪过程的雷达回波强度不超过40 dBz,回波顶高低于10 km;雷达参量ZmaxZmean15的演变与降雪过程强弱的变化对应较好,强回波中心增强和及地的时段与主要降雪时段较一致,可以揭示系统强度的变化和降水粒子的下落,对降雪天气具有一定的预报意义。

关键词: 暴雪, 环流形势, HYSPLIT, 雷达回波, 雷达参量

Abstract: Three heavy snow processes occurring in Liaoning province on March 4,2007,February 12,2009,and February 21,2017 respectively,were investigated based on the ECMWF (European Center for Medium-Range Weather Forecasts) ERA-interim reanalysis data,convention observations and echo data from the Doppler radar.The similarities and differences of the large scale circulation background,air mass source,vapor source and characteristics of the radar echo parameter of these three processes were studied.The results indicate that the three events are all caused by the influences of the upper-level trough.The upper-level trough cooperated with the surface inverted trough or cold front strengthens the dynamic lift.The air masses from different water vapor sources and the convergence of cold and warm air are the key factors to strengthen the snowfall processes.The reflectivity of the snowfall process is usually below 40 dBz,and the maximum echo depth is less than 10 km.The maximum reflectivity (Zmax) and the average value of the radar reflectivity larger than 15 dBz (Zmean15) at each level within the thunderstorm correspond very well with the process of snowfall and reveal the intensity change of the systems and the drop conditions of the precipitation particles.It is important to the forecasting of rainfall.

Key words: Heavy snow, Circulation Patterns, HYSPLIT, Radar echo, Radar echo parameters

中图分类号: