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首页> 外文期刊>Advances in Atmospheric Sciences >Numerical Study on a Severe Downburst-Producing Thunderstorm on 23 August 2001 in Beijing
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Numerical Study on a Severe Downburst-Producing Thunderstorm on 23 August 2001 in Beijing

机译：2001年8月23日北京一次严重暴发雷暴的数值研究。

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A thunderstorm that produced severe wind, heavy rain and hail on 23 August 2001 in Beijing was studied by a three-dimensional cloud model including hail-bin microphysics. This model can provide important information for hail size at the surface, which is not available in hail parameterization cloud models. The results shows that the cloud model, using hail-bin microphysics, could reasonably reflect the storm's characteristics such as life cycle, rainfall distribution and the diameter of the hailstones and also can reproduce developing processes of downbursts, where they can then be compared with the observed features of the storm. The downburst formation mechanism was investigated based on the cloud microphysics of the simulated storm and it was found that the downburst was primarily produced by hail loading and enhanced by cooling processes that were due to hail melting and rain evaporation. The loading and melting of hail played crucial roles in the formation of downbursts within the storm.
机译：2001年8月23日，北京发生了一场雷暴天气，产生了强风，大雨和冰雹。该模型可以提供有关表面冰雹大小的重要信息，而这在冰雹参数化云模型中是不可用的。结果表明，利用冰雹微物理学的云模型可以合理地反映风暴的生命周期，降雨分布和冰雹直径等特征，并且可以再现暴发的发展过程，然后可以将其与暴风雪进行比较。观察到的风暴特征。在模拟风暴的云微观物理基础上研究了突降形成机理，发现该突降主要由冰雹载荷产生，并由于冰雹融化和雨水蒸发而通过冷却过程而增强。冰雹的装载和融化在暴风雨中爆发的形成中起着至关重要的作用。

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