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首页> 外文期刊>Acta Meteorologica Sinica >Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data
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Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data

机译:从多普勒雷达数据反演风场的变分同化技术研究

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This paper introduces a variational assimilation technique for the retrieval of wind fields from Doppler radar data. The assimilated information included both the radial velocity (RV) and the movement of radar echo. In this assimilation technique, the key is transforming the movement of radar echo to a new radar measuring variable- "apparent velocity" (AV). Thus, the information of wind is added, and the indeterminacy of recovering two-dimensional wind only by AV was overcome effectively by combining RV with AV. By means of CMA GRAPES-3Dvar and CINRAD data, some experiments were performed. The results show that the method of retrieval of wind fields is useful in obtaining the construction of the weather system.
机译:本文介绍了一种变分同化技术,用于从多普勒雷达数据中检索风场。被吸收的信息包括径向速度(RV)和雷达回波的运动。在这种同化技术中,关键是将雷达回波的运动转换为新的雷达测量变量“视在速度”(AV)。因此,增加了风的信息,并且通过将RV与AV结合,有效地克服了仅通过AV来回收二维风的不确定性。利用CMA GRAPES-3Dvar和CINRAD数据,进行了一些实验。结果表明,风场反演方法对于获得天气系统的构造是有用的。

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