Mobile Doppler Radar Observations of a Tornado in a Supercell near Bassett, Nebraska, on 5 June 1999. Part I: Tornadogenesis
Mobile Doppler Radar Observations of a Tornado in a Supercell near Bassett, Nebraska, on 5 June 1999. Part I: Tornadogenesis
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1999 年 6 月 5 日，移动多普勒雷达对内布拉斯加州巴塞特附近超级单元中龙卷风的观测。第一部分：龙卷风发生
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
A. Pazmany
中科院分区：
文献类型：
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作者：
H. Bluestein;C. Weiss;A. Pazmany
摘要这两部分论文详细介绍了由移动，W波段多普勒雷达收集的高分辨率风和反射率数据的分析：数据集捕获了内布拉斯加州中北部超级电池在5 1999年6月。从地面附近的龙卷风涡流的形成是从一系列扫描序列中描述的，范围从龙卷风发生前的30 s间隔到龙卷风一生的大部分时间内的10-15 s间隔。沿着增强的雷达反射率的弓形线发现了100-200 m宽度的旋风涡旋，这似乎是后翼阵线的前缘。在弓形雷达的鼻子和射流的前方，它们嵌入了大型旋风中。它的北部和东北部似乎没有与龙卷风相互作用。
Abstract This two-part paper details an analysis of high-resolution wind and reflectivity data collected by a mobile, W-band Doppler radar: The dataset captures the near-surface life history of a tornado in a supercell in north-central Nebraska on 5 June 1999. The formation of the tornado vortex near the ground is described from a sequence of sector scans ranging from 30-s intervals prior to tornadogenesis to 10–15-s intervals during much of the lifetime of the tornado. Cyclonic vortices of 100–200 m width were found along a bow-shaped line of enhanced radar reflectivity, at what appears to have been the leading edge of a rear-flank gust front. At the time of tornadogenesis, one of these vortices was located just ahead of the nose of the bow-shaped radar echo and a jet, which were embedded within a larger-scale cyclone. At other times, small-scale cyclonic vortices coexisted with the tornado along an arc-shaped line extending to its north and northeast but did not appear to interact with the tornado. The ...