Genesis of Tornadoes Associated with Hurricanes
Genesis of Tornadoes Associated with Hurricanes
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DOI：
10.1175/1520-0493(1983)111
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发表时间：
1983-09
影响因子：
3.2
通讯作者：
R. Cecil Gentry
中科院分区：
文献类型：
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作者：
R. Cecil Gentry
摘要 对过去 22 年飓风的研究表明，几乎每一个其中心穿过德克萨斯州布朗斯维尔和纽约长岛之间的美国海岸的全飓风强度的热带气旋都与龙卷风有关。据报道，大约 60% 的热带气旋在穿越海岸时仅具有风暴强度，同时也会引发龙卷风。飓风-龙卷风的气候学更新至 1982 年。龙卷风形成于飓风区域中涡度方程的倾翻项和收敛项最大的区域。这种情况通常发生在相对陆地上空轨迹相对较短的空中。也就是说，它们形成的距离足够远，足以使下层空气因与地面的摩擦而减慢速度，但又足够靠近海洋，使上层空气仍以大约与海洋上方时的速度移动。这意味着大多数龙卷风要么形成于飓风中心附近（从眼墙的外缘向外......
Abstract Study of the hurricanes of the last 22 years reveals that nearly every tropical cyclone of full hurricane intensity whose center crosses the United States coast between Brownsville, Texas and Long Island, New York has associated tornadoes. Approximately 60% of the tropical cyclones of only storm intensity when crossing the coast also have tornadoes reported. The climatology of hurricane-tornadoes is brought up to date through 1982. Tornadoes form in areas of the hurricane where the tipping term and convergence terms of the vorticity equation are the largest. This usually happens in air that has had a relatively short trajectory over land. That is, they form far enough inland for the lower layers of air to be slowed by friction with the ground but close enough to the ocean for the upper layers of air to still be moving at approximately the speed they had while above the ocean. This means that most of the tornadoes either form near the center of the hurricane (from the outer edge of the eyewall out...