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项目编号 | 1651786 |
The Origin of Rotation in Tornadoes | |
Johannes Dahl | |
主持机构 | Texas Tech University |
项目开始年 | 2017 |
2017-09-01 | |
项目结束日期 | 2020-08-31 |
资助机构 | US-NSF |
项目类别 | Standard Grant |
项目经费 | 241336(USD) |
国家 | 美国 |
语种 | 英语 |
英文摘要 | This study seeks to investigate the relative roles of downdrafts and surface rotation in the "seed" formation of rotation in tornadoes. This research will lead to explanations of the fundamental processes that lead to the formation of tornadoes in different situations. Specifically, the role of surface friction will be quantified using several numerical simulations as well as different realizations of friction parameterizations. In addition to the training of graduate students, this study will engage the public through radio segments discussing the research and severe weather in general. To investigate these problems, a vorticity decomposition technique will be applied to high-resolution full-physics simulations of thunderstorms as well as to idealized downdraft simulations. The research will apply a vorticity decomposition technique along trajectories to idealized numerical simulations. The mathematical treatment of the problem will introduce aspects of differential geometry into the severe storms community and offer a new perspective on the formal description of vortex dynamics. |
URL | 查看原文 |
文献类型 | 项目 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/71778 |
专题 | 环境与发展全球科技态势 |
推荐引用方式 GB/T 7714 | Johannes Dahl.The Origin of Rotation in Tornadoes.2017. |
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