气候变化领域集成服务门户(CCPortal): Differentiating Between Tornadic and Nontornadic Supercells Using Polarimetric Radar Signatures of Hydrometeor Size Sorting

CCPortal

DOI	10.1029/2020GL088242
	Differentiating Between Tornadic and Nontornadic Supercells Using Polarimetric Radar Signatures of Hydrometeor Size Sorting
	Loeffler S.D.; Kumjian M.R.; Jurewicz M.; French M.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Supercell storms are the most prolific producers of violent tornadoes, though only a fraction of supercells produce tornadoes. Past research into the differences between tornadic and nontornadic supercells have provided some insights but are of little utility to a real-time warning decision process. Operational weather radars provide consistent observations in real time, but conventional radar techniques have not been able to effectively distinguish between tornadic and nontornadic supercells. After the national radar network upgrade to polarimetric capabilities in 2013, a polarimetric signature frequently observed in supercells is the separation of low-level enhanced differential reflectivity ZDR and specific differential phase KDP regions. We analyzed this signature in tornadic and nontornadic supercell cases and found that, although the separation distances are similar, the separation orientations are statistically significantly different. Tornadic supercells have orientations more orthogonal to storm motion and nontornadic supercells have more parallel orientations. Possible reasons for these differences are discussed. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Meteorological radar; Storms; Tornadoes; Differential reflectivity; Parallel orientation; Polarimetric capabilities; Polarimetric radars; Real time warning; Separation distances; Specific differential phase; Tornadic supercells; Polarimeters; hydrometeorology; observational method; polarization; radar altimetry; reflectivity; remote sensing; storm surge; supercell; tornado
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/170203
作者单位	Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; NOAA/National Weather Service, State College, PA, United States; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States
推荐引用方式 GB/T 7714	Loeffler S.D.,Kumjian M.R.,Jurewicz M.,et al. Differentiating Between Tornadic and Nontornadic Supercells Using Polarimetric Radar Signatures of Hydrometeor Size Sorting[J],2020,47(12).
APA	Loeffler S.D.,Kumjian M.R.,Jurewicz M.,&French M.M..(2020).Differentiating Between Tornadic and Nontornadic Supercells Using Polarimetric Radar Signatures of Hydrometeor Size Sorting.Geophysical Research Letters,47(12).
MLA	Loeffler S.D.,et al."Differentiating Between Tornadic and Nontornadic Supercells Using Polarimetric Radar Signatures of Hydrometeor Size Sorting".Geophysical Research Letters 47.12(2020).