| 阵风锋的雷达探测和研究 |
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| 引用本文： | 葛润生.阵风锋的雷达探测和研究[J].应用气象学报,1986,1(2):113-122. |
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| 作者姓名： | 葛润生 |
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| 作者单位： | 1.气象科学研究院中尺度气象研究室 |
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| 摘 要： | 本文应用北京地区和美国Oklahoma地区天气雷达观测资料比较了两类阵风锋。快速运动的阵风锋常与猛烈发展的强风暴相伴随，它的出现，风暴将持续猛烈地发展。运动缓慢近于静止的阵风锋则常出现在风暴的减弱阶段，它的出现加速了风暴的消亡。阵风锋的形成与风暴中的下沉气流有关，两类不同的阵风锋反映了下沉气流与环境的不同作用。文中还对阵风锋形成雷达回波的原因进行了探索，认为阵风锋锋区的湍流对电磁波的散射是形成雷达回波的可能机制。应用多普勒天气雷达和高塔的探测资料，对阵风锋回波的强度进行了理论估算，估算值与雷达实测值比较一致。
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Gust Front Observation and Study by Radar |
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| Affiliation: | (Agency for Meso-synoptic Weather Research, AMS |
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| Abstract: | In this paper, two types of gust fronts are compared by using the weather radar date obtained in Beijing, China and Oklahoma, U. S. A.. The first type is the fast moving gust fronts, which is often accompanied by violently developing storms, the onset of it gives an indication for the continuous development of severe storms. The other is the gust front moved slowly (static gust fronts) which is often occurred at the weakening stage of the relevant storm, the occurrence of it speeds up the end of the storm. The formation of the gust fronts is related to the downdraft in the storm, and the two types of gust fronts are the results of different interactions between downdraft and environment. Also, the cause of formation of the radar echo from the gust fronts has been studied too. It is believed that the radar echo is the result of activity of air turbulence occurred in the boundary between the draft and environment flow. The theoritical estimation of the echo intensity of gust fronts based on the Doppler weather radar data and tower data, is satisfactorily consistent with the observation data |
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