The Origin of Rotation in Tornadoes

GSTDTAP

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.