一次飑线引发的大风强沙尘暴诊断分析

钱莉; 杨永龙; 殷玉春; 王生元

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DOI:10.7519/j.issn.1000-0526.2009.3.006

气象:2009,35(3):42-48

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一次飑线引发的大风强沙尘暴诊断分析

(1.中国气象局兰州干旱气象研究所甘肃省（中国气象局）干旱气候变化与减灾重点 （开放）实验室，兰州 730020;2.甘肃省武威市气象局)

Diagnose Analysis on a Gale and Strong Sandstorm Initiated by Squall Line

Qian Li^1,2,3, Yang Yonglong³, Yin Yuchun³, Wang Shengyuan³

(1.Lanzhou Institute of Arid Meteorology, CMA;2.Key Laboratory of Arid Climatic Change and Reducing Disaster in Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction, CMA, Lanzhou 730020;3.Wuwei Meteorological Office)

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投稿时间：2008-09-10 修订日期：2008-12-05

中文摘要: 利用常规探测、地面加密观测、T213数值预报产品和FY 2c/2d红外卫星云图资料，对20 08年5月2日河西走廊东部飑线引发的大风强沙尘暴过程进行了天气动力诊断和中尺度分析。结果表明：飑线引发的强风暴是产生强沙尘暴的根本原因。河西走廊东部处在不稳定大气层结中，500hPa阶梯短波槽为飑线提供了大尺度环流背景；700hPa变形场是飑线的触发系统；地面热低压的发展加大了冷锋前后的气压和温度梯度，为对流发展提供了热力不稳定条件；高空急流对于飑线的生成、发展具有重要的作用。

中文关键词: 强沙尘暴飑线发生机制物理特征

Abstract:Using conventional survey, ground intensive observations, numerical pr ediction product T213 and FY-2c/2d infrared satellite cloud image, synoptic-dyna mical diagnosis and mesoscale analysis are carried on gale and strong sandstorm process initiated by squall line on May 2, 2008 in east of Hexi corridor. The re sults show that strong storm initiated by squall line produced the strong sandst orm. East of Hexi Corridor is in instable atmosphere stratification. Large scale circulation background is provided by stepped short wave trough of 500 hPa for squall line. Deformation field of 700 hPa is triggering system of squall line. G radient of pressure and temperature before and after cold front is enlarged by d evelopment of ground thermal low pressure, by whichthermal energy stability condition is provided for convection development. Upper air jet stream has vital role for production and development of squall line.

keywords: strong sandstorm squall line production mechanism physical characteristic

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基金项目:甘肃省气象局2007年重点科研项目“数值预报产品在河西精细化预报中的应用”

作者	单位
钱莉	中国气象局兰州干旱气象研究所甘肃省（中国气象局）干旱气候变化与减灾重点 （开放）实验室，兰州 730020 甘肃省武威市气象局
杨永龙	甘肃省武威市气象局
殷玉春	甘肃省武威市气象局
王生元	甘肃省武威市气象局

Author Name	Affiliation
Qian Li	Lanzhou Institute of Arid Meteorology, CMA Key Laboratory of Arid Climatic Change and Reducing Disaster in Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction, CMA, Lanzhou 730020 Wuwei Meteorological Office
Yang Yonglong	Wuwei Meteorological Office
Yin Yuchun	Wuwei Meteorological Office
Wang Shengyuan	Wuwei Meteorological Office

引用文本：
钱莉,杨永龙,殷玉春,王生元,2009.一次飑线引发的大风强沙尘暴诊断分析[J].气象,35(3):42-48.
Qian Li,Yang Yonglong,Yin Yuchun,Wang Shengyuan,2009.Diagnose Analysis on a Gale and Strong Sandstorm Initiated by Squall Line[J].Meteor Mon,35(3):42-48.