气候变化领域集成服务门户(CCPortal): High Temporal-Spatial Resolution Observation of Tornadogenesis in a Shallow Supercell Associated With Typhoon Hagibis (2019) Using Phased Array Weather Radar

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DOI	10.1029/2020GL089635
	High Temporal-Spatial Resolution Observation of Tornadogenesis in a Shallow Supercell Associated With Typhoon Hagibis (2019) Using Phased Array Weather Radar
	Adachi T.; Mashiko W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	This paper reports finely resolved radar signatures of tornadogenesis associated with a typhoon and elucidates how a small-scale tornadic vortex emerged on the ground in relation to the parent storm structure. Approximately 5 min before producing JEF-2 damage, a counterrotating vortex pair appeared above the rear-flank outflow region. The vortex pair developed upward, and its counterclockwise vortex approached a preexisting mesocyclone located aloft. At their closest approach, an abrupt intensification of the counterclockwise vortex occurred in the upper part and propagated downward. Meanwhile, significant vortex shrinking occurred at low levels. As a result, a small-scale tornadic vortex emerged over the damaged area. We suggest that coupling of the vortex pair with a mesocyclone and near-surface vorticity stretching played crucial roles in tornadogenesis. Since the coupling occurred on a minute scale and was affected by subtle spatial change on a scale of hundreds of meters, the tornado occurred in highly sensitive conditions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Hurricanes; Meteorological radar; Optical resonators; Counter-rotating Vortex Pair; Radar signature; Sensitive conditions; Spatial changes; Spatial resolution; Storm structure; Tornadic vortices; Tornadogenesis; Vortex flow; array; frontogenesis; outflow; radar; spatiotemporal analysis; tornado; typhoon; vortex; vorticity; wave propagation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169674
作者单位	Meteorogical Research Institute, Japan Meteorological Agency, Tsukuba, Japan
推荐引用方式 GB/T 7714	Adachi T.,Mashiko W.. High Temporal-Spatial Resolution Observation of Tornadogenesis in a Shallow Supercell Associated With Typhoon Hagibis (2019) Using Phased Array Weather Radar[J],2020,47(19).
APA	Adachi T.,&Mashiko W..(2020).High Temporal-Spatial Resolution Observation of Tornadogenesis in a Shallow Supercell Associated With Typhoon Hagibis (2019) Using Phased Array Weather Radar.Geophysical Research Letters,47(19).
MLA	Adachi T.,et al."High Temporal-Spatial Resolution Observation of Tornadogenesis in a Shallow Supercell Associated With Typhoon Hagibis (2019) Using Phased Array Weather Radar".Geophysical Research Letters 47.19(2020).