首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Method of VIL Calculation for X-band Polarimetric Radar and Potential of VIL for Nowcasting of Localized Severe Rainfall -Case Study of the Zoshigaya Downpour, 5 August 2008-
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Method of VIL Calculation for X-band Polarimetric Radar and Potential of VIL for Nowcasting of Localized Severe Rainfall -Case Study of the Zoshigaya Downpour, 5 August 2008-

机译:X波段极化雷达的VIL计算方法和局部强降雨临近预报的VIL潜力-越谷暴雨案例研究,2008年8月5日-

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References(13) Cited-By(5) Supplementary materials(4) This paper discusses the availability of the vertically integrated liquid (VIL) water content product from 3-cm wavelength polarimetric radar in precipitation detection and estimation. Based on a case of localized severe rainfall around Zoshigaya, Tokyo, Japan on 5 August 2008, VIL values are compared with radar derived rain intensity and surface rain-gauge data. VIL is calculated by three methods: (1) using only the horizontal reflectivity (Z), (2) using only specific differential phase (KDP), and (3) using both Z and KDP. Two integral height scales are tested: a height near the melting layer (5 km) and a height over the echo top (15 km). The composite method of Z and KDP proved to be the best approach for calculating VIL. VIL values were consistent with gauge measurements: the maximum normalized cross-correlation coefficients at all three observation sites (Edogawa Elementary School, Daiichi Junior High School, and Toshima Branch) exceed 0.9, and detection by VIL has a 5-10 min lead time than gauge measurements.
机译:参考文献(13)被引用的文献(5)补充材料(4)本文讨论了3 cm波长极化雷达垂直积分液体(VIL)水分积在降水检测和估计中的可用性。根据2008年8月5日在日本东京都越谷地区发生局部强降雨的情况,将VIL值与雷达得出的降雨强度和地表雨量数据进行了比较。 VIL是通过三种方法计算的:(1)仅使用水平反射率(Z),(2)仅使用特定的微分相位(KDP),以及(3)同时使用Z和KDP。测试了两个整体高度标尺:靠近融化层的高度(5 km)和位于回波顶部的高度(15 km)。 Z和KDP的复合方法被证明是计算VIL的最佳方法。 VIL值与量规测量值一致:所有三个观测点(江户川小学,第一市立中学和丰岛分公司)的最大归一化互相关系数均超过0.9,而VIL的检测所需的提前时间为5-10分钟量规测量。

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