The complex behavior of El Niño winter 2015-2016
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...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2017
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Online Access: | https://eprints.ucm.es/id/eprint/43116/ https://eprints.ucm.es/id/eprint/43116/1/calvofernandez38libre%28embargar%20hasta%201-10-2017%29.pdf https://doi.org/10.1002/2017GL072920 |
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ftunivcmadrid:oai:www.ucm.es:43116 2023-05-15T13:14:56+02:00 The complex behavior of El Niño winter 2015-2016 Palmeiro Nuñez, Froila María Iza San Juan, Maddalen Barriopedro Cepero, David Calvo Fernández, Natalia García Herrera, Ricardo 2017-03-28 application/pdf https://eprints.ucm.es/id/eprint/43116/ https://eprints.ucm.es/id/eprint/43116/1/calvofernandez38libre%28embargar%20hasta%201-10-2017%29.pdf https://doi.org/10.1002/2017GL072920 en eng American Geophysical Union https://eprints.ucm.es/id/eprint/43116/1/calvofernandez38libre%28embargar%20hasta%201-10-2017%29.pdf info:eu-repo/semantics/openAccess Astrofísica Astronomía info:eu-repo/semantics/article PeerReviewed 2017 ftunivcmadrid https://doi.org/10.1002/2017GL072920 2022-05-12T20:04:22Z 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. Article in Journal/Newspaper aleutian low Greenland Universidad Complutense de Madrid (UCM): E-Prints Complutense Greenland Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Pacific Geophysical Research Letters 44 6 2902 2910 |
institution |
Open Polar |
collection |
Universidad Complutense de Madrid (UCM): E-Prints Complutense |
op_collection_id |
ftunivcmadrid |
language |
English |
topic |
Astrofísica Astronomía |
spellingShingle |
Astrofísica Astronomía Palmeiro Nuñez, Froila María Iza San Juan, Maddalen Barriopedro Cepero, David Calvo Fernández, Natalia García Herrera, Ricardo The complex behavior of El Niño winter 2015-2016 |
topic_facet |
Astrofísica Astronomía |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Palmeiro Nuñez, Froila María Iza San Juan, Maddalen Barriopedro Cepero, David Calvo Fernández, Natalia García Herrera, Ricardo |
author_facet |
Palmeiro Nuñez, Froila María Iza San Juan, Maddalen Barriopedro Cepero, David Calvo Fernández, Natalia García Herrera, Ricardo |
author_sort |
Palmeiro Nuñez, Froila María |
title |
The complex behavior of El Niño winter 2015-2016 |
title_short |
The complex behavior of El Niño winter 2015-2016 |
title_full |
The complex behavior of El Niño winter 2015-2016 |
title_fullStr |
The complex behavior of El Niño winter 2015-2016 |
title_full_unstemmed |
The complex behavior of El Niño winter 2015-2016 |
title_sort |
complex behavior of el niño winter 2015-2016 |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
https://eprints.ucm.es/id/eprint/43116/ https://eprints.ucm.es/id/eprint/43116/1/calvofernandez38libre%28embargar%20hasta%201-10-2017%29.pdf https://doi.org/10.1002/2017GL072920 |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Greenland Midwinter Pacific |
geographic_facet |
Greenland Midwinter Pacific |
genre |
aleutian low Greenland |
genre_facet |
aleutian low Greenland |
op_relation |
https://eprints.ucm.es/id/eprint/43116/1/calvofernandez38libre%28embargar%20hasta%201-10-2017%29.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017GL072920 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
6 |
container_start_page |
2902 |
op_container_end_page |
2910 |
_version_ |
1766266151413743616 |