| 项目编号: | 1651786
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| 项目名称: | The Origin of Rotation in Tornadoes |
| 作者: | Johannes Dahl
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| 承担单位: | Texas Tech University
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| 批准年: | 2017
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| 开始日期: | 2017-09-01
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| 结束日期: | 2020-08-31
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| 资助金额: | 241336
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | research
; surface rotation
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| 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. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89239
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Johannes Dahl. The Origin of Rotation in Tornadoes. 2017-01-01.
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