Barriopedro Cepero, DavidGarcía Herrera, Ricardo FranciscoHernández Martín, Emiliano2023-06-202023-06-202006-07-270094-827610.1029/2006GL025763https://hdl.handle.net/20.500.14352/50982© 2006 by the American Geophysical Union. The authors would like to thank two anonymous reviewers for their valuable comments. The Spanish Science and Technology Department supported this study trough the VALIMOD (Climatic VALIdation of Conceptual MODels) project (REN2002-04558-C04-01).This paper examines the role of North Hemisphere snow cover in the linkage between the winter North Atlantic Oscillation (NAO) and the summer Northern Annular Mode (NAM). This transition is partially supported by the persistence of the NAO-induced snow cover anomalies and the asymmetric thermal distribution induced by summer snow cover. We define an index of subpolar temperature difference which links winter NAO with the subsequent summer NAM. The index is also significant in the linkage between summer and winter climates and can be used as an useful predictor of the upcoming winter NAO.engjournal articlehttp://dx.doi.org/10.1029/2006GL025763http://onlinelibrary.wiley.com/open access52Atlantic OscillationAnnular ModeNaoCirculationTemperaturesClimateImpactExtentAstrofísicaAstronomía (Física)Física atmosférica2501 Ciencias de la Atmósfera