DOI: 10.1175/JCLI-D-16-0791.1
Scopus记录号: 2-s2.0-85021177908
论文题名: Sting-jet windstorms over the north atlantic: Climatology and contribution to extreme wind risk
作者: Hart N.C.G. ; Gray S.L. ; Clark P.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 14 起始页码: 5455
结束页码: 5471
语种: 英语
Scopus关键词: Climatology
; Oceanography
; Risk assessment
; Extratropical cyclones
; Extreme events
; North Atlantic Ocean
; Storm track
; Wind gust
; Storms
英文摘要: Extratropical cyclones with damaging winds can have large socioeconomic impacts when they make landfall. During the last decade, studies have identified a mesoscale transient jet, the sting jet, that descends from the tip of the hooked cloud head toward the top of the boundary layer in the dry intrusion region as a cause of strong surface winds, and especially gusts, in some cyclones. While many case studies have focused on the dynamics and characteristics of these jets, there have been few studies that assess the climatology of the associated cyclones and their importance for wind risk. Here the climatological characteristics of North Atlantic cyclones are determined in terms of the possibility that they had sting jets using a previously published sting-jet precursor diagnostic applied to ERA-Interim data over 32 extended winter seasons from 1979 to 2012. Of the 5447 cyclones tracked, 32% had the precursor (42% in the 22% of cyclones that developed explosively). Precursor storms have a more southerly and zonal storm track than storms without the precursor, and precursor storms tend to be more intense as defined by 850-hPa relative vorticity. This study also shows that precursor storms are the dominant cause of cyclone-related resolved strong wind events over the British Isles for 850-hPa wind speeds exceeding 30 m s-1. Hence, early detection of a sting-jet storm could give advance warning of enhanced wind risk. However, over continental northwestern Europe, precursor cyclone-related windstorm events occur far less often. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48865
Appears in Collections: 气候变化与战略
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作者单位: Department of Meteorology, University of Reading, Reading, United Kingdom; School of Geography and the Environment, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Hart N.C.G.,Gray S.L.,Clark P.A.. Sting-jet windstorms over the north atlantic: Climatology and contribution to extreme wind risk[J]. Journal of Climate,2017-01-01,30(14)