| 郑州一次暴雨过程的多普勒雷达风廓线产品特征分析 |
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| 引用本文： | 王君.郑州一次暴雨过程的多普勒雷达风廓线产品特征分析[J].高原山地气象研究,2018,38(3):85-90. |
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| 作者姓名： | 王君 |
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| 作者单位： | 1. 河南省气象学会, 郑州 450003; |
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| 基金项目： | 河南省气象局重点项目(KZ201701)中国气象局预报员专项(CMAYBY2017-045) |
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| 摘 要： | 对2008年7月13~14日郑州市出现的一次暴雨过程中的雷达风廓线产品(VWP)特征和基于风廓线产品计算的风暴相对螺旋度特征进行分析,结果发现:(1)边界层辐合线的存在利于风暴云的生成;超低空急流的产生加强了水汽输送,为风暴云的发展提供有利条件,而底层东风气流的加强为对流的触发提供了抬升条件;(2)多部雷达的VWP产品综合分析可捕捉到直接导致对流性天气的中小尺度系统;(3)风暴相对螺旋度(SRH)的迅速增大、稳定、减弱的变化趋势与雨强的增强、维持和减弱相对应,但SRH值的大小与雨强并无一致的线性关系;(4)个例的分析应用表明新一代雷达的VWP产品提供了高时间分辨率的风场信息,为强降水的短时临近预报提供了更加丰富的参考信息。
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| 关 键 词： | 风廓线产品 暴雨 超低空急流 风暴相对螺旋度 |
| 收稿时间： | 2018-06-30 |
Analysis of Doppler Radar VWP Products Characteristics during a Rainstorm Process in Zhengzhou |
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| Institution: | 1. Henan Provincial Meteorological Society, Zhengzhou 450003, China;2. Henan Institute of Meteorological Sciences, Zhengzhou 450003, China |
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| Abstract: | The Doppler weather radar VWP products have been used to analysis the heavy rainstorm weather on July 13-14, 2008, in Zhengzhou. The results showed that : (1) The existence of boundary layer convergence line in favor of the formation of storm clouds; the production of super low-level jet increase the transfer of water vapor and provide the favorable conditions for the development of storm cloud; and the intensification of the easterly flow in the bottom layer provide the lifting conditions for the convection trigger; (2) The integrated analysis of many radar VWP productions can catch the mesoscale and microscale system which conduced the convective weather; (3) The variation tendency of storm-relative helicity (SRH) increase rapidly, stability and reduced is corresponded with the increase, maintenance and reduced of rainfall intensity, but the size of SRH values is not consistent with the rainfall intensity; (4) The case analysis and application indicate that VWP products of radar provide high temporal resolution wind field information, and provide more extensive reference information for short term forecasting and nowcasting of severe rainfall. |
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