Polarimetric and Dual-Doppler Radar Observations of the Lipscomb County, Texas, Supercell Thunderstorm on 23 May 2002
Polarimetric and Dual-Doppler Radar Observations of the Lipscomb County, Texas, Supercell Thunderstorm on 23 May 2002
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2002 年 5 月 23 日德克萨斯州利普斯科姆县超级单体雷暴的偏振和双多普勒雷达观测
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Wurman
中科院分区：
文献类型：
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作者：
Jeffrey Frame;P. Markowski;Yvette P. Richardson;J. Straka;J. Wurman
摘要本文介绍了2002年5月23日在国际H2O计划（IHOP）期间美国国家大气研究中心（NCAR）S波段偏振（SPOL）雷达、两部多普勒轮式（DOW）雷达和希腊XPOL雷达对一个超级单体的偏振和双多普勒观测结果。偏振雷达观测始于风暴组织成超级单体，并持续了一个多小时，当时风暴正处于成熟阶段。使用模糊逻辑水凝物分类算法检索成熟风暴内的水凝物分布。双多普勒雷达的观测开始于偏振雷达观测结束的时间，涵盖了风暴成熟阶段的结束和大部分消散阶段。利用双多普勒风场合成方法，分析了400米以上的锋面外流对风暴附近水平涡度场的增强作用。在这种情况下，由于低层中气旋相对较弱，对流层的对流层将受到影响。
Abstract Polarimetric and dual-Doppler observations of a supercell observed by the National Center for Atmospheric Research (NCAR) S-band Polarimetric (SPOL) radar, two Doppler-On-Wheels (DOW) radars, and the Greek XPOL radar on 23 May 2002 during the International H2O Project (IHOP) are presented. The polarimetric radar observations began as the storm organized into a supercell and continued for over an hour while the storm was in its mature phase. The hydrometeor distribution within the mature storm was retrieved using a fuzzy logic hydrometeor classification algorithm. The dual-Doppler radar observations began around the time that the polarimetric radar observations concluded, and they covered the end of the mature phase and much of the dissipation phase of the storm. The dual-Doppler wind syntheses are used to evaluate the importance of the forward-flank outflow in augmenting the horizontal vorticity field near the storm above 400 m. In this case, having a relatively weak low-level mesocyclone, the pa...