Pacific Modulation of the North Atlantic Storm Track Response to Sudden Stratospheric Warming Events
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State: Public
Version: Final published version
License: Not specified
Serval ID
serval:BIB_D1703AFED4A1
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Pacific Modulation of the North Atlantic Storm Track Response to Sudden Stratospheric Warming Events
Journal
Geophysical Research Letters
ISSN
0094-8276
1944-8007
1944-8007
Publication state
Published
Issued date
28/01/2020
Peer-reviewed
Oui
Volume
47
Number
2
Language
english
Abstract
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.
Keywords
sudden stratospheric warmings, storm track, downward impact, eddy kinetic energy
Web of science
Publisher's website
Funding(s)
Swiss National Science Foundation / PP00P2_170523
Create date
08/03/2022 14:13
Last modification date
31/10/2024 22:53