RT Journal Article
T1 Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions
A1 García-Burgos, Marina
A1 Gómara Cardalliaguet, Íñigo
A1 Rodríguez De Fonseca, María Belén
A1 González Alemán, Juan Jesús
A1 Zurita Gotor, Pablo
A1 Ayarzagüena Porras, Blanca
AB Several 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.
PB Elsevier
YR 2023
FD 2023-09-03
LK https://hdl.handle.net/20.500.14352/97688
UL https://hdl.handle.net/20.500.14352/97688
LA eng
NO García-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.
NO Unión Europea Horizonte 2020
NO Universidad Complutense de Madrid
NO Ministerio de Ciencia e Innovación (España)
NO JeDiS
NO Instituto de Salud Carlos III
DS Docta Complutense
RD 6 abr 2025