The 8 June 1995 McLean, Texas, Storm. Part II: Cyclic Tornado Formation, Maintenance, and Dissipation
The 8 June 1995 McLean, Texas, Storm. Part II: Cyclic Tornado Formation, Maintenance, and Dissipation
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1995 年 6 月 8 日，德克萨斯州麦克莱恩，风暴。
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
H. Bluestein
中科院分区：
文献类型：
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作者：
D. Dowell;H. Bluestein
摘要 1995 年 6 月 8 日，参与龙卷风旋转起源验证实验 (VORTEX) 的科学家使用 Electra 多普勒雷达 (ELDORA) 收集了一个独特的数据集。 ELDORA 观测记录了德克萨斯州麦克莱恩附近超级单体雷暴中与三场大型龙卷风相关的风暴规模环流的连续生命周期。本文第一部分对风暴的演变进行了定性描述。在每个风暴规模环流发展的第一阶段，上升气流与环境低层水平涡度的相互作用产生了涡柱，涡柱的强度随着高度的增加而增加。随着涡旋的成熟，涡度在低层（即低于 2 公里 AGL）处大幅增加，并超过高空涡度。每个龙卷涡都位于上升气流的后侧附近，周围的低层水平涡度被局部修改，很可能是由风暴内的弱斜压造成的。低位地平线倾斜...
Abstract On 8 June 1995, scientists participating in the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX) collected a unique dataset with the Electra Doppler Radar (ELDORA). The ELDORA observations document the sequential life cycles of storm-scale circulations associated with three large tornadoes in a supercell thunderstorm near McLean, Texas. A qualitative description of the evolution of the storm was provided in Part I of this paper. During the first stage of development of each storm-scale circulation, interaction of the updraft with the environmental low-level horizontal vorticity produced a vorticity column that increased in intensity with height. As the vortex matured, vorticity increased greatly at low levels (i.e., below 2 km AGL) and exceeded that aloft. Each tornadic vortex was located near the rear side of the updraft, where the surrounding low-level horizontal vorticity was modified locally, most likely by weak baroclinity within the storm. Tilting of low-level horizo...