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The quantitative precipitation estimation system for Dallas-Fort Worth (DFW) urban remote sensing network

机译:达拉斯-沃斯堡(DFW)城市遥感网络的定量降水估算系统

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The Dallas-Fort Worth (DFW) urban radar network consists of a combination of high resolution X band radars and a standard National Weather Service (NWS) Next-Generation Radar (NEXRAD) system operating at S band frequency. High spatiotemporal-resolution quantitative precipitation estimation (QPE) is one of the important applications of such a network. This paper presents a real-time QPE system developed by the Collaborative Adaptive Sensing of the Atmosphere (CASA) Engineering Research Center for the DFW urban region using both the high resolution X band radar network and the NWS S band radar observations. The specific dual-polarization radar rainfall algorithms at different frequencies (i.e., Sand X-band) and the fusion methodology combining observations at different temporal resolution are described. Radar and rain gauge observations from four rainfall events in 2013 that are characterized by different meteorological phenomena are used to compare the rainfall estimation products of the CASA DFW QPE system to conventional radar products from the national radar network provided by NWS. This high-resolution QPE system is used for urban flash flood mitigations when coupled with hydrological models. (C) 2015 Elsevier B.V. All rights reserved.
机译:达拉斯-沃思堡(DFW)城市雷达网络由高分辨率X波段雷达和在S波段频率下运行的标准国家气象局(NWS)下一代雷达(NEXRAD)系统组成。高时空分辨率定量降水估计(QPE)是这种网络的重要应用之一。本文介绍了由大气环境协同自适应传感(CASA)工程研究中心针对DFW城市地区开发的实时QPE系统,该系统同时使用高分辨率X波段雷达网络和NWS S波段雷达观测数据。描述了在不同频率(即Sand X波段)的特定双极化雷达降雨算法以及结合了不同时间分辨率观测值的融合方法。利用2013年四次降雨事件的雷达和雨量计观测结果(具有不同的气象现象),将CASA DFW QPE系统的降雨估算产品与NWS提供的国家雷达网络中的常规雷达产品进行比较。结合水文模型,此高分辨率QPE系统可用于缓解城市山洪。 (C)2015 Elsevier B.V.保留所有权利。

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