Spatially Variable Advection Correction of Radar Data. Part II: Test Results

Spatially Variable Advection Correction of Radar Data. Part II: Test Results
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雷达数据的空间可变平流校正。

DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
C. Potvin
C. Potvin
中科院分区:
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文献类型:
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作者:
A. Shapiro;K. Willingham;C. Potvin

文献摘要

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摘要第一部分中介绍的空间可变对流校正/分析程序是使用嵌入在固体涡旋中的分析反射率斑点,以及2003年5月8日经过俄克拉荷马州中部俄克拉荷马州的龙卷风超级单体雷暴的终端多普勒天气雷达(TDWR)和天气监视雷达-1988多普勒(WSR-88 D)数据进行测试的。在TDWR测试中,将两个体积扫描时间的计划位置指示器(PPI)数据输入到平流校正程序,其中来自第三个扫描时间的PPI数据(介于两个输入时间之间)用于验证结果。与以任何恒定平流速度进行平流校正的反射率场相比,该程序产生的分析反射率场具有更低的均方根误差和更高的相关系数。
Abstract The spatially variable advection-correction/analysis procedure introduced in Part I is tested using analytical reflectivity blobs embedded in a solid-body vortex, and Terminal Doppler Weather Radar (TDWR) and Weather Surveillance Radar-1988 Doppler (WSR-88D) data of a tornadic supercell thunderstorm that passed over central Oklahoma on 8 May 2003. In the TDWR tests, plan position indicator (PPI) data at two volume scan times are input to the advection-correction procedure, with PPI data from a third scan time, intermediate between the two input times, that is used to validate the results. The procedure yields analyzed reflectivity fields with lower root-mean-square errors and higher correlation coefficients than those reflectivity fields that were advection corrected with any constant advection speed.