RT Journal Article T1 Interannual variability of cut-off low systems over the European sector: The role of blocking and the Northern Hemisphere circulation modes A1 Barriopedro Cepero, David A1 Gimeno, L. A1 Nieto, R. A1 García Herrera, Ricardo Francisco A1 Lorente, J. A1 Redaño, A. A1 Gordillo, A. A1 Serrano, A. A1 Ribera, P. A1 Torre, L. de la AB An earlier developed multidecadal database of Northern Hemisphere cut-off low systems (COLs), covering a 41 years period (from 1958 to 1998) is used to study COLs interannual variability in the European sector (25 degrees-47.5 degrees N, 50 degrees W-40 degrees E) and the major factors controlling it. The study focus on the influence on COLs interannual variability, of larger scale phenomena such as blocking events and other main circulation modes defined over the Euro-Atlantic region. It is shown that there is a very large interannual variability in the COLs occurrence at the annual and seasonal scales, although without significant trends. The influence of larger scale phenomena is seasonal dependent, with the positive phase of the NAO favoring autumn COL development, while winter COL occurrence is mostly related to blocking events. During summer, the season when more COLs occur, no significant influences were found. PB Springer Wien SN 0177-7971 YR 2007 FD 2007-04 LK https://hdl.handle.net/20.500.14352/50978 UL https://hdl.handle.net/20.500.14352/50978 LA eng NO © Springer-Verlag 2006. This work was supported by the Spanish Ministry of Science and Technology (MCYT) under Grant REN2002-04558-C04-01=02=03=04 and by the Galician Programme of Research and Development under Grant GIDIT03PXIC38301PN. This work was supported also during three months by a postdoctoral fee from the University of Vigo, Spain (Programa de axudas a mobilidade dos investigadores; Convocatoria de axudas para investigación 2005). We thank also two anonymous reviewers whose comments help us to improve the initial manuscript. NO Spanish Ministry of Science and Technology (MCYT) NO Galician Programme of Research and Development NO University of Vigo, Spain DS Docta Complutense RD 7 jun 2025