中尺度涡旋的雷达探测和分析
RADAR OBSERVATION AND ANALYSIS OF MESO-SCALE VORTEX
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摘要: 应用单部多普勒天气雷达观测资料对出现在京津冀地区的中尺度涡旋进行了分析,分析结果表明:发展较强的中小尺度天气系统往往与风场的旋转或辐合辐散有关,气旋性涡度场对积云对流活动有明显的组织和增强作用,是降雨增强的一种判据。Abstract: Using single Doppler weather radar about the radial velocity information, a simple method for estimating the divergence and vorticity is presented. The vortexes are analyzed by this method in Beijing-Tianjin-Hebei area. The result indicates that the formation of the strong meso-scale weather system is related to turn or convergence and divergence of wind filed. The vorticity cyclone is a signature recognition of heavy rain and very useful for the cumulus convection.
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Key words:
- Meso-scale vortex;
- Velocity image;
- Vorticity
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表 1 单部多普勒雷达推算的涡度和散度值
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