Pacific Modulation of the North Atlantic Storm Track Response to Sudden Stratospheric Warming Events

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Ressource 1Télécharger: Geophysical Research Letters - 2020 - Afargan%E2%80%90Gerstman - Pacific Modulation of the North Atlantic Storm Track Response to.pdf (13481.39 [Ko])
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Version: Final published version
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ID Serval
serval:BIB_D1703AFED4A1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Pacific Modulation of the North Atlantic Storm Track Response to Sudden Stratospheric Warming Events
Périodique
Geophysical Research Letters
Auteur⸱e⸱s
Afargan-Gerstman Hilla, Domeisen Daniela I. V.
ISSN
0094-8276
1944-8007
Statut éditorial
Publié
Date de publication
28/01/2020
Peer-reviewed
Oui
Volume
47
Numéro
2
Langue
anglais
Résumé
Sudden stratospheric warming (SSW) events have been suggested to be followed by a surface impact, though this response varies between events. Using reanalysis data, we identify two types of tropospheric responses to SSWs: Two thirds of the SSW events are dominated by a zonally symmetric tropospheric response with an equatorward shift of the jet in the Atlantic, consistent with the canonical SSW response in the form of a negative signature of the North Atlantic Oscillation. For the remaining third of SSW events, a zonally asymmetric response is found, associated with a poleward shift of the jet in the Atlantic. The Pacific is found to contribute to the sign of the North Atlantic response, as synoptic wave propagation from the Eastern Pacific links the Pacific and Atlantic storm tracks for both equatorward and poleward jet responses.
Mots-clé
sudden stratospheric warmings, storm track, downward impact, eddy kinetic energy
Web of science
Financement(s)
Fonds national suisse / PP00P2_170523
Création de la notice
08/03/2022 14:13
Dernière modification de la notice
31/10/2024 22:53
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