| 一次飑线引发的大风强沙尘暴诊断分析 |
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| 引用本文： | 钱莉,杨永龙,殷玉春,王生元.一次飑线引发的大风强沙尘暴诊断分析[J].气象,2009,35(3):42-48. |
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| 作者姓名： | 钱莉 杨永龙 殷玉春 王生元 |
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| 作者单位： | 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;甘肃省武威市气象局
2. 甘肃省武威市气象局 |
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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” |
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| 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2008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.
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| 关 键 词： | 强沙尘暴 飑线 发生机制 物理特征 |
| 收稿时间： | 2008/9/10 0:00:00 |
| 修稿时间： | 2008/12/5 0:00:00 |
Diagnose Analysis on a Gale and Strong Sandstorm Initiated by Squall Line |
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| Qian Li,Yang Yonglong,Yin Yuchun and Wang Shengyuan.Diagnose Analysis on a Gale and Strong Sandstorm Initiated by Squall Line[J].Meteorological Monthly,2009,35(3):42-48. |
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| Authors: | Qian Li Yang Yonglong Yin Yuchun and Wang Shengyuan |
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| Affiliation: | 1. 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;Lanzhou 730020;2. Wuwei Meteorological Office |
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| Abstract: | Using conventional survey, ground intensive observations, numerical prediction product T213 and FY-2c/2d infrared satellite cloud image, synoptic-dynamical 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 results show that strong storm initiated by squall line produced the strong sandstorm. East of Hexi Corridor is in instable atmosphere stratification. Large scale circulation background is provided by ste... |
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| Keywords: | strong sandstorm squall line production mechanism physical characteristic |
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