DOI: 10.1007/s00382-014-2330-2
Scopus记录号: 2-s2.0-84925464939
论文题名: The dynamical structure of intense Mediterranean cyclones
作者: Flaounas E. ; Raveh-Rubin S. ; Wernli H. ; Drobinski P. ; Bastin S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-09-10 起始页码: 2411
结束页码: 2427
语种: 英语
英文摘要: This paper presents and analyzes the three-dimensional dynamical structure of intense Mediterranean cyclones. The analysis is based on a composite approach of the 200 most intense cyclones during the period 1989–2008 that have been identified and tracked using the output of a coupled ocean–atmosphere regional simulation with 20 km horizontal grid spacing and 3-hourly output. It is shown that the most intense Mediterranean cyclones have a common baroclinic life cycle with a potential vorticity (PV) streamer associated with an upper-level cyclonic Rossby wave breaking, which precedes cyclogenesis in the region and triggers baroclinic instability. It is argued that this common baroclinic life cycle is due to the strongly horizontally sheared environment in the Mediterranean basin, on the poleward flank of the quasi-persistent subtropical jet. The composite life cycle of the cyclones is further analyzed considering the evolution of key atmospheric elements as potential temperature and PV, as well as the cyclones’ thermodynamic profiles and rainfall. It is shown that most intense Mediterranean cyclones are associated with warm conveyor belts and dry air intrusions, similar to those of other strong extratropical cyclones, but of rather small scale. Before cyclones reach their mature stage, the streamer’s role is crucial to advect moist and warm air towards the cyclones center. These dynamical characteristics, typical for very intense extratropical cyclones in the main storm track regions, are also valid for these Mediterranean cases that have features that are visually similar to tropical cyclones. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54167
Appears in Collections: 过去全球变化的重建
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Institut Pierre Simon Laplace/Laboratoire de Météorologie Dynamique, CNRS, Ecole Polytechnique, Palaiseau, France; Université Versailles St-Quentin; Sorbonne Universités, UPMC Univ. Paris 06; CNRS/INSU, LATMOS-IPSL, Guyancourt, France
Recommended Citation:
Flaounas E.,Raveh-Rubin S.,Wernli H.,et al. The dynamical structure of intense Mediterranean cyclones[J]. Climate Dynamics,2015-01-01,44(2017-09-10)