VORTEX2 Observations of a Low-Level Mesocyclone with Multiple Internal Rear-Flank Downdraft Momentum Surges in the 18 May 2010 Dumas, Texas, Supercell*
VORTEX2 Observations of a Low-Level Mesocyclone with Multiple Internal Rear-Flank Downdraft Momentum Surges in the 18 May 2010 Dumas, Texas, Supercell*
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DOI：
10.1175/mwr-d-13-00240.1
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发表时间：
2014-08
影响因子：
3.2
通讯作者：
P. Skinner;C. Weiss;Michael M. French;H. Bluestein;P. Markowski;Yvette P. Richardson
中科院分区：
文献类型：
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作者：
P. Skinner;C. Weiss;Michael M. French;H. Bluestein;P. Markowski;Yvette P. Richardson
在2010年5月18日在得克萨斯州杜马斯附近的超级单元期间，在龙卷风实验中的第二次验证中收集的摘要行为。主要数据收集平台包括两个KA波动多普勒雷达，它们收集了Dumas Supercell后轮流出内部的近乎表面的，短基线双多普勒数据集； X频段，分阶段的移动多普勒雷达，该雷达收集了具有高时间分辨率的体积单多普勒数据；观察到了六探针移动中脑的原位热力学和风力学观测。杜马斯超级电池的rapid进化，包括低水平中clone子的发育和衰变和四个内部后翼降水脉（RFD）动量激增。在中层中环旋酮从低水平循环中最小移位时，观察到低级中clone的强化和向上生长，这表明向上方向的扰动压力G ...
AbstractObservations collected in the second Verification of the Origins of Rotation in Tornadoes Experiment during a 15-min period of a supercell occurring on 18 May 2010 near Dumas, Texas, are presented. The primary data collection platforms include two Ka-band mobile Doppler radars, which collected a near-surface, short-baseline dual-Doppler dataset within the rear-flank outflow of the Dumas supercell; an X-band, phased-array mobile Doppler radar, which collected volumetric single-Doppler data with high temporal resolution; and in situ thermodynamic and wind observations of a six-probe mobile mesonet.Rapid evolution of the Dumas supercell was observed, including the development and decay of a low-level mesocyclone and four internal rear-flank downdraft (RFD) momentum surges. Intensification and upward growth of the low-level mesocyclone were observed during periods when the midlevel mesocyclone was minimally displaced from the low-level circulation, suggesting an upward-directed perturbation pressure g...