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中国沙漠 ›› 2005, Vol. 25 ›› Issue (5): 702-705.

• 研究论文 • 上一篇    下一篇

一次区域性大风沙尘暴天气成因分析

杨晓玲1,2,3, 丁文魁1,2,3, 钱莉2, 张慧玲2   

  1. 1. 中国气象局兰州干旱气象研究所, 甘肃兰州 730020;
    2. 甘肃省武威市气象局, 甘肃武威 733000;
    3. 甘肃省干旱气候变化与减灾重点实验室, 甘肃兰州 730020
  • 收稿日期:2004-05-24 修回日期:2004-07-02 出版日期:2005-10-20 发布日期:2005-10-20
  • 作者简介:杨晓玲(1971-),女(汉族),甘肃民勤人,工程师,研究生在读,主要从事天气预报和研究工作。E-mail:wwqxj6150343@163.com
  • 基金资助:
    兰州区域气象中心"天气与气候研究室"项目;"武威市灾重天气预报监测服务系统"课题资助

Diagnosis Analysis of a Gale and Sandstorm Weather Case

YANG Xiao-ling1,2,3, DING Wen-kui1,2,3, QIAN Li2, ZHANG Hui-ling2   

  1. 1. Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730000, China;
    2. Wuwei Meteorological Bureau of Gansu Province, Wuwei 733000, Gansu, China;
    3. Key Laboratory of Arid Climate Change and Reducing Disaster, Lanzhou 730020, China
  • Received:2004-05-24 Revised:2004-07-02 Online:2005-10-20 Published:2005-10-20

摘要: 应用基本观测资料和我国数值预报产品HLAFS资料,对2004年3月2日由西伯利亚冷槽东移南压并强烈发展,在河西走廊东部武威市形成的一次区域性大风、沙尘暴天气过程,从天气学成因、动力机制等方面进行了诊断分析。结果表明,强冷空气的卷入使西伯利亚冷槽强烈发展,为沙尘暴的发展提供了动力条件,而西伯利亚冷槽的垂直结构为沙尘暴提供了动量下传机制,地面冷锋后部形成的大风,为沙尘暴的形成创造了基本条件,在此基础上得出了西伯里亚冷槽的预报着眼点。

关键词: 沙尘暴, 数值预报, 西伯利亚冷槽, 诊断分析

Abstract: Using data of basic observation and numerical forecasting product HLAFS, we analyzed the synoptic causes and forcing mechanism of a gale and sandstorm weather process in March 2nd of 2004 in Wuwei city of Hexi corridor. This weather process was formed under the Siberian Cold Trough moving towards southeast and developing greatly. The involvement of very cold air made the Siberian Cold Trough develops further, which provided the forcing condition for sandstorm. The vertical structure of Siberian Cold Trough provided the mechanism of momentum transmitting downwards for sandstorm. The gale at rear of ground cold front created the basic condition for sandstorm. Accordingly, we got the starting point of forecasting sandstorm.

Key words: sandstorm, numerical forecast, Siberian Cold Trough, diagnosis analysis

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