DOI: 10.1007/s00382-013-1688-x
Scopus记录号: 2-s2.0-84891630106
论文题名: Large scale features and energetics of the hybrid subtropical low 'Duck' over the Tasman Sea
作者: Pezza A.B. ; Garde L.A. ; Veiga J.A.P. ; Simmonds I.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-01-02 起始页码: 453
结束页码: 466
语种: 英语
英文关键词: Blocking
; Cyclones
; Lorenz energetics
; Mid-latitude storms
; Polar lows
英文摘要: New aspects of the genesis and partial tropical transition of a rare hybrid subtropical cyclone on the eastern Australian coast are presented. The 'Duck' (March 2001) attracted more recent attention due to its underlying genesis mechanisms being remarkably similar to the first South Atlantic hurricane (March 2004). Here we put this cyclone in climate perspective, showing that it belongs to a class within the 1 % lowest frequency percentile in the Southern Hemisphere as a function of its thermal evolution. A large scale analysis reveals a combined influence from an existing tropical cyclone and a persistent mid-latitude block. A Lagrangian tracer showed that the upper level air parcels arriving at the cyclone's center had been modified by the blocking. Lorenz energetics is used to identify connections with both tropical and extratropical processes, and reveal how these create the large scale environment conducive to the development of the vortex. The results reveal that the blocking exerted the most important influence, with a strong peak in barotropic generation of kinetic energy over a large area traversed by the air parcels just before genesis. A secondary peak also coincided with the first time the cyclone developed an upper level warm core, but with insufficient amplitude to allow for a full tropical transition. The applications of this technique are numerous and promising, particularly on the use of global climate models to infer changes in environmental parameters associated with severe storms. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54491
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth Sciences, The University of Melbourne, Melbourne, VIC, 3010, Australia; Centre for Australian Weather and Climate Research, PO Box 1289K, Melbourne, VIC, 3001, Australia; Institute of Technology, Amazon State University, Manaus, Brazil
Recommended Citation:
Pezza A.B.,Garde L.A.,Veiga J.A.P.,et al. Large scale features and energetics of the hybrid subtropical low 'Duck' over the Tasman Sea[J]. Climate Dynamics,2014-01-01,42(2017-01-02)