The 8 June 1995 McLean, Texas, Storm. Part I: Observations of Cyclic Tornadogenesis
The 8 June 1995 McLean, Texas, Storm. Part I: Observations of Cyclic Tornadogenesis
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1995 年 6 月 8 日，德克萨斯州麦克莱恩，风暴。
DOI：
10.1175/1520-0493(2002)130
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发表时间：
2002
影响因子：
3.2
通讯作者：
H. Bluestein
中科院分区：
文献类型：
--
作者：
D. Dowell;H. Bluestein
摘要1995年6月8日，参加“验证龙卷风实验中旋转起源”的科学家们在德克萨斯州姆克林附近的一场风暴中收集了机载多普勒雷达数据。伊莱克特拉多普勒雷达（ELDORA）在形成和成熟阶段扫描了三个重要的龙卷风，其中一个龙卷风的强度为F4/F5。ELDORA数据的伪双多普勒分析的证据揭示了一个周期性龙卷风形成的过程，定性类似于以前的概念模型中所描述的。特别是，后翼阵风锋似乎在确定系列中下一个涡流的位置方面起着重要作用。当龙卷风形成时，一个小的流出区域（3-5公里宽）在龙卷风前面涌动，在阵风锋中产生局部隆起。一个新的涡度最大值可能在外流前缘附近形成。与早期的概念模型所建议的相反，后翼阵风锋与机翼相交。
Abstract On 8 June 1995 scientists participating in the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX) collected airborne Doppler radar data in a storm that produced a family of tornadoes near McLean, Texas. The Electra Doppler Radar (ELDORA) scanned three significant tornadoes during their formative and mature stages; one of the tornadoes was of F4/F5 intensity. Evidence from pseudo-dual-Doppler analyses of the ELDORA data reveals a process of cyclic tornado formation qualitatively similar to that depicted in previous conceptual models. In particular, the rear-flank gust front appears to play a major role in determining the location of the next vortex in the series. When a tornado forms, a small region (3–5 km wide) of outflow surges ahead of the tornado, producing a local bulge in the gust front. A new vorticity maximum may form near the leading edge of the outflow. In contrast to what is suggested by earlier conceptual models, intersection of the rear-flank gust front with a w...