García-Burgos, MarinaGómara Cardalliaguet, ÍñigoRodríguez De Fonseca, María BelénGonzález Alemán, Juan JesúsZurita Gotor, PabloAyarzagüena Porras, Blanca2024-02-012024-02-012023-09-03García-Burgos, Marina, et al. «Abrupt and Persistent Atmospheric Circulation Changes in the North Atlantic under La Niña Conditions». Weather and Climate Extremes, vol. 42, diciembre de 2023, p. 100609. DOI.org (Crossref), https://doi.org/10.1016/j.wace.2023.100609.10.1016/j.wace.2023.100609https://hdl.handle.net/20.500.14352/97688Several recent studies have linked the exceptional North Atlantic and Eurasian atmospheric evolution during late February and March 2018 to the Sudden Stratospheric Warming (SSW) that took place a few weeks earlier. February 2018 was characterized by an abrupt transition from the positive to the negative phase of the North Atlantic Oscillation (NAO) and a subsequent persistence of the negative NAO for several weeks. This paper investigates the contribution of atmospheric and oceanic phenomena to both the 2018 event and a set of 19 identified analogues (including the former) for the period 1959-2022. Evidence is given that La Nin similar to a conditions in the tropical Pacific and upstream North Atlantic cyclones play an important role as a trigger for these events. Ensuing two-way tropospheric-strato-spheric coupling and eddy feedbacks provide extended-range persistence for negative NAO conditions. These results may help improve the prediction of such exceptional events.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article2212-0947https://doi.org/10.1016/j.wace.2023.100609open access550.3Geofísica25 Ciencias de la Tierra y del Espacio