非地转湿<b>Q</b>矢量在台风“云娜”暴雨过程中的分析应用

非地转湿Q矢量在台风“云娜”暴雨过程中的分析应用

1.
Department of Atmospheric sciences, Nanjing University, Nanjing 210093, China;Taizhou Meteorological Office, Taizhou 318000, China
2.
Department of Atmospheric sciences, Nanjing University, Nanjing 210093, China;Hainan Meteorological Observatory, Haikou 570203, China

摘要: 应用非地转湿 Q 矢量理论,对2004年8月12-15日台风“云娜”登陆后造成的大范围持续暴雨过程进行诊断分析。结果表明,非地转湿 Q 矢量能比较清楚地揭示台风暴雨的演变过程,非地转湿 Q 矢量的散度负值区和流场辐合区与未来12小时的强降水落区有较好的对应关系;非地转湿 Q 矢量的散度的垂直分布能够反映台风外围对流发展的深度,对判断台风在陆地上的维持有一定的意义。
- 非地转湿Q矢量 /
- 暴雨 /
- 台风“云娜”
Abstract: The Ageostrophic Wet Q -vector method is applied to analyze a torrential rain process,which was caused by typhoon“rananim”after its landing during August 12 to 15 2004.The results show that the Ageostrophic Wet Q -vector could clearly reveal the evolution of the typhoon torrential rain.It is found that the negative area of the divergence and convergence zones of stream field of Ageostrophic Wet Q -vector at 850 hPa is correlated well to heavy rain area in the next 12 hours.The vertial distribution of the Wet Q -vector divergence could indicate the convective intensity around the perimeter of typhoon and is useful for forecasting the maintenance of typhoon over land.
- ageostrophic wet Q-vector /
- torrential rain /
- typhoon Rananim

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