| 多普勒雷达径向散度在迎风坡降水中的应用 |
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| 引用本文： | 王丽荣,王立荣,牛朝阳,许宏利,景华.多普勒雷达径向散度在迎风坡降水中的应用[J].气象科学,2010,30(2):228-233. |
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| 作者姓名： | 王丽荣 王立荣 牛朝阳 许宏利 景华 |
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| 作者单位： | 1. 石家庄市气象局,石家庄,050081
2. 河北省气象局,石家庄,050021 |
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| 基金项目： | 国家自然科学基金，灾害天气国家重点实验室开放课题预报员专项项目 |
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| 摘 要： | 以太行山东部3次迎风坡降水过程为例,分析了由多普勒雷达原始资料计算得到的径向辐合与迎风坡降水分布的关系:迎风坡降水大值区落在临近径向的辐合大值区的弱辐合区内,且降水中心落在正径向速度开始减小的边界同NE风急流相交的位置。连续分布的径向辐合越强,降水越强。同时以2004年7月11—12日过程为例说明单站径向辐合和降水率的关系:径向辐合越强,降水越强,且径向辐合变化超前于降水率变化1h以上;径向辐合持续减弱3h以上,降水率减小,直至结束。径向散度对迎风坡区域的降水预报有很好的指示作用:综合分析区域径向辐合分布和单站径向辐合随时间的变化,可以预测迎风坡降水的落区、发展及生消。
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| 关 键 词： | 多普勒雷达 径向散度 迎风坡降水 |
| 收稿时间： | 2008/9/10 0:00:00 |
An application of Doppler radar radial divergence to precipitation of windward slope |
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| Wang Lirong,Wang Lirong,Niu Zhaoyang,Xu Hongli and Jing Hua.An application of Doppler radar radial divergence to precipitation of windward slope[J].Scientia Meteorologica Sinica,2010,30(2):228-233. |
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| Authors: | Wang Lirong Wang Lirong Niu Zhaoyang Xu Hongli and Jing Hua |
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| Institution: | Wang Lirong1 Wang Lirong1 Niu Zhaoyang1 Xu Hongli1 Jing Hua2 (1 Shijiazhuang Meteorological Bureau,Shijiazhuang 050081,China)(2 Hebei Meteorological Bureau,Shijiazhuang 050021,China) |
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| Abstract: | The relationship between radial divergence calculated by Doppler radar base data and precipitation distribution in windward slope are analyzed according to three rainfall processes in the east of Taihang Mountains windward side,the results suggest that the large value area of windward precipitation is located in the right weak convergence area of strong radial convergence (RC),and the center of precipitation is located in the intersection area between the boundary where positive radial speed began to decrea... |
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| Keywords: | Doppler radar Radial divergence Windward slope precipitation |
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