| Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data |
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| 作者姓名： | WAN Qilin XUE Jishan ZHUANG Shiyu |
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| 作者单位： | Institute of Tropical and Marine Meteorology，Chinese Academy of Meteorological Sciences，Chinese Academy of Meteorological Sciences CMA，Guangzhou 510080，Beijing 100081，Beijing 100081 |
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| 基金项目： | Supported by Research on Innovative Meteorological NWP Techniques in China (2001BA607B)
Research on Monitoring and Forecasting Techniques of Landfall Typhoon in China (2001DIA20026). |
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| 摘 要： | 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.
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| 关 键 词： | 风场 变分同化技术 多普勒雷达 数据处理 数据恢复 |
| 收稿时间： | 2005/12/26 0:00:00 |
Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data |
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| WAN Qilin,XUE Jishan,ZHUANG Shiyu.Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data[J].Acta Meteorologica Sinica,2006,20(1):1-19. |
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| Authors: | WAN Qilin XUE Jishan ZHUANG Shiyu |
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| Institution: | [1]Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080 [2]Chinese Academy of Meteorological Sciences, Beijing 100081 |
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| Abstract: | 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. |
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| Keywords: | variational assimilation technique wind fields Doppler radar data |
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