The Pretornadic Phase of the Goshen County, Wyoming, Supercell of 5 June 2009 Intercepted by VORTEX2. Part I: Evolution of Kinematic and Surface Thermodynamic Fields
The Pretornadic Phase of the Goshen County, Wyoming, Supercell of 5 June 2009 Intercepted by VORTEX2. Part I: Evolution of Kinematic and Surface Thermodynamic Fields
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DOI：
10.1175/mwr-d-11-00336.1
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发表时间：
2012-09
影响因子：
3.2
通讯作者：
P. Markowski;Yvette P. Richardson;James N. Marquis;J. Wurman;K. Kosiba;P. Robinson;D. Dowell;E. Rasmussen;R. Davies-Jones
中科院分区：
文献类型：
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作者：
P. Markowski;Yvette P. Richardson;James N. Marquis;J. Wurman;K. Kosiba;P. Robinson;D. Dowell;E. Rasmussen;R. Davies-Jones
摘要作者分析了2009年6月5日怀俄明州歌珊县超级单体的龙卷风前阶段（2100-2148 UTC;龙卷风发生开始于2152 UTC），该超级单体被第二次龙卷风实验中旋转起源的验证（VORTEX 2）截获。分析依赖于怀俄明州夏延的天气监视雷达-1988多普勒（WSR-88 D）的雷达数据，以及一对车轮上多普勒（DOW）雷达、移动的中网观测和移动的移动探空观测。风暴类似于过去观测到的超级单体。例如，它发展出一对反向旋转的涡旋，这些涡旋横跨后翼外流内的钩状回波，并由双涡线连接，气旋性涡旋在龙卷风形成之前变得越来越占主导地位。钩状回波区的外流在此演化阶段具有相对较小的虚位温θ_∞亏损。几公里上游（北）的位置马克西姆...
AbstractThe authors analyze the pretornadic phase (2100–2148 UTC; tornadogenesis began at 2152 UTC) of the Goshen County, Wyoming, supercell of 5 June 2009 intercepted by the second Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX2). The analysis relies on radar data from the Weather Surveillance Radar-1988 Doppler (WSR-88D) in Cheyenne, Wyoming (KCYS), and a pair of Doppler-on-Wheels (DOW) radars, mobile mesonet observations, and mobile sounding observations.The storm resembles supercells that have been observed in the past. For example, it develops a couplet of counter-rotating vortices that straddle the hook echo within the rear-flank outflow and are joined by arching vortex lines, with the cyclonic vortex becoming increasingly dominant in the time leading up to tornadogenesis. The outflow in the hook echo region, where sampled, has relatively small virtual potential temperature θυ deficits during this stage of evolution. A few kilometers upstream (north) of the location of maxim...