RT Journal Article
T1 The complex behavior of El Niño winter 2015-2016
A1 Palmeiro Núñez, Froila María
A1 Iza San Juan, Maddalen
A1 Barriopedro Cepero, David
A1 Calvo Fernández, Natalia
A1 García Herrera, Ricardo Francisco
AB This paper examines the outstanding characteristics of the strong 2015-2016 El Nino (EN) winter and its impact over the European region through the stratosphere. Despite being classified as a strong eastern Pacific (EP) EN event, our analysis reveals an anomalous behavior, with some signatures that are more typical of central Pacific (CP) EN events instead. They include (i) a record-breaking value of the CP index, (ii) a stronger polar vortex in early and midwinter, due to reduced upward wave activity and a weakened Aleutian low, and (iii) the occurrence of one of the earliest stratospheric final warmings (SFWs) on record, which are more prone to occur during CP-EN. Following the SFW, a stratospheric influence on the Euro-Atlantic sector is reported in spring, with persistent Greenland blocking resulting in extreme precipitation over some southern European regions. Results highlight the importance of considering early SFWs as mediators of El Nino teleconnections.
PB American Geophysical Union
SN 0094-8276
YR 2017
FD 2017-03-28
LK https://hdl.handle.net/20.500.14352/17857
UL https://hdl.handle.net/20.500.14352/17857
LA eng
NO ©2017. American Geophysical Union. All Rights Reserved. We acknowledge the ECMWF for providing ERA-40 and ERA-Interim reanalysis data (http://apps.ecmwf.int/datasets/), the Global Precipitation Climatology Centre for the precipitation data (ftp://ftp-anon.dwd.de/pub/data/gpcc/html/download_gate.html), and the Met Office Hadley Centre for the HadISST1 data (http://www.metoffice.gov.uk/hadobs/hadisst/data/download.html). We thank Kate Willett and an anonymous reviewer for their helpful comments. This work was supported by the Spanish Ministry of Economy and Competitiveness through the PALEOSTRAT (CGL2015-69699-R) project and the European Project 603557-STRATOCLIM under program FP7-ENV.2013.6.1-2. F.M. Palmeiro was funded by grant BES-2013-063906.
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
DS Docta Complutense
RD 10 abr 2025