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2002年3月19日沙尘暴爆发条件分析
引用本文:肖贤俊,刘还珠,宋振鑫,何金海.2002年3月19日沙尘暴爆发条件分析[J].应用气象学报,2004,15(1):1-9.
作者姓名:肖贤俊  刘还珠  宋振鑫  何金海
作者单位:1.南京气象学院,南京 210044
基金项目:NMC7893 0 2,YF2 0 0 1A 0 2课题资助
摘    要:使用沙尘暴预报模式的输出资料,对2002年3月19~21日的一次特强沙尘暴过程作动力诊断分析。结果表明,该次沙尘暴由蒙古气旋后部冷锋锋生产生的偏西北大风引发。近地面风速的垂直切变和地面热通量的加大,都可使边界层湍流加强扬起地面沙尘。地面锋区附近风场的强水平切变,锋面垂直环流及锋后斜压转换的作用,将地面卷起的沙尘带到高空,引发强沙尘暴。

关 键 词:沙尘暴模式    边界层湍流    斜压转换
收稿时间:2002-11-21
修稿时间:2002年11月21

The Mechanism of a Sand Storm over China in March 2002
Xiao Xianjun,Liu Huanzhu,Song Zhenxin,He Jinhai.The Mechanism of a Sand Storm over China in March 2002[J].Quarterly Journal of Applied Meteorology,2004,15(1):1-9.
Authors:Xiao Xianjun  Liu Huanzhu  Song Zhenxin  He Jinhai
Affiliation:1.Nanjing I nstitute of Meteorology , Nanjing 2100442.National Meteorology Center , Benjing 100081
Abstract:A numerical model from Shao Yaping is applied to the sand storm over China in March 2002, and the predictions are in good agreement with meteorological records and satellite images. A dynamical diagnose based on the data from the model presents us more information than real meteorology record about the mechanism of the sand storm. It is caused by the frontogenesis of cold front connected with Menggu cyclone. Large amount of available potential energy convert to dynamic energy in the baroclinic mesosphere. It results in frontogenesis. As the strong normal share of the wind, turbulent fluctuation is strengthened and the sands are raised up from the surface ground. The wind speed in the atmosphere of the low level has a horizontal share and this pushes the sands in the atmosphere aggregate, so the visibility descends. A strong sandstorm is produced.
Keywords:Numerical sandstorm model  Boundary turbulent flow  Horizontal share  Baroclinic convert
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