English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/130148
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Abrupt transitions in the NAO control of explosive North Atlantic cyclone development

AuthorsGómara, Íñigo ; Rodríguez-Fonseca, Belén ; Zurita-Gotor, Pablo ; Ulbrich, Sven; Pinto, J. G.
KeywordsExtra-tropical cyclones
Explosive cyclogenesis
NAO
Jet stream
Ocean variability
AMOC
Issue Date9-Feb-2016
PublisherSpringer
CitationClimate Dynamics, (in press): 1-21 (2016)
AbstractExplosive cyclones are intense extra-tropical low pressure systems featuring large deepening rates. In the Euro-Atlantic sector, they are a major source of life-threatening weather impacts due to their associated strong wind gusts, heavy precipitation and storm surges. The wintertime variability of the North Atlantic cyclonic activity is primarily modulated by the North Atlantic Oscillation (NAO). In this study, we investigate the interannual and multi-decadal variability of explosive North Atlantic cyclones using track density data from two reanalysis datasets (NCEP and ERA-40) and a control simulation of an atmosphere/ocean coupled General Circulation Model (GCM—ECHAM5/MPIOM1). The leading interannual and multi-decadal modes of variability of explosive cyclone track density are characterized by a strengthening/weakening pattern between Newfoundland and Iceland, which is mainly modulated by the NAO at both timescales. However, the NAO control of interannual cyclone variability is not stationary in time and abruptly fluctuates during periods of 20–25 years long both in NCEP and ECHAM5/MPIOM1. These transitions are accompanied by structural changes in the leading mode of explosive cyclone variability, and by decreased/enhanced baroclinicity over the sub-polar/sub-tropical North Atlantic. The influence of the ocean is apparently important for both the occurrence and persistence of such anomalous periods. In the GCM, the Atlantic Meridional Overturning Circulation appears to influence the large-scale baroclinicity and explosive cyclone development over the North Atlantic. These results permit a better understanding of explosive cyclogenesis variability at different climatic timescales and might help to improve predictions of these hazardous events.
Publisher version (URL)http://dx.doi.org/10.1007/s00382-016-3015-9
URIhttp://hdl.handle.net/10261/130148
DOI10.1007/s00382-016-3015-9
Appears in Collections:(IGEO) Artículos
Files in This Item:
File Description SizeFormat 
CD_2016_Gomara_et_al_2016_accepted_climdyn.pdf2,03 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.