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Title

On the relation between explosive cyclones affecting Europe and the North Atlantic Oscillation

AuthorsGómara, Íñigo ; Rodríguez-Fonseca, Belén ; Zurita-Gotor, Pablo ; Pinto, J. G.
KeywordsExtra-tropical cyclones
Explosive cyclogenesis
North Atlantic Oscillation
Jet stream
Rossby wave-breaking
Europe
Issue Date28-Mar-2014
PublisherAmerican Geophysical Union
CitationGeophysical Research Letters 41(6): 2182- 2190 (2014)
AbstractIntense winter cyclones often lead to hazardous weather over Europe. Previous studies have pointed to a link between the North Atlantic Oscillation (NAO) and strong European windstorms. However, the robustness of this relation for cyclones of varying intensities remains largely unexplored. In this paper, the bi-directional relation between the NAO and cyclones impacting Europe is analyzed for the period 1950-2010 focusing on the sensitivity to storm intensity. Evidence is given that explosive (EC) and non-explosive cyclones (NoEC) predominantly develop under different large-scale circulation conditions over the North Atlantic. Whereas NoEC evolve more frequently under negative and neutral NAO phases, the number of EC is larger under a positive NAO phase, typically characterized by an intensified jet toward Western Europe. Important differences are also found on the dynamics of NAO evolution after peak intensity for both cyclone populations. © 2014. American Geophysical Union. All Rights Reserved.
URIhttp://hdl.handle.net/10261/97895
DOI10.1002/2014GL059647
Identifiersdoi: 10.1002/2014GL059647
issn: 1944-8007
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