Nonlinearity in the North Pacific Atmospheric Response to a Linear ENSO Forcing

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Ressource 1Download: Geophysical Research Letters - 2019 - Jim nez‐Esteve - Nonlinearity in the North Pacific Atmospheric Response to a Linear.pdf (1965.41 [Ko])
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Version: Final published version
License: All rights reserved
Serval ID
serval:BIB_C450DA0B875E
Type
Article: article from journal or magazin.
Collection
Publications
Title
Nonlinearity in the North Pacific Atmospheric Response to a Linear ENSO Forcing
Journal
Geophysical Research Letters
Author(s)
Jiménez-Esteve B., Domeisen D. I. V.
ISSN
0094-8276
1944-8007
Publication state
Published
Issued date
28/02/2019
Peer-reviewed
Oui
Volume
46
Number
4
Pages
2271-2281
Language
english
Abstract
El Niño Southern Oscillation (ENSO) exerts a remote impact on the North Pacific and North American winter climate. Both observational and model studies have suggested nonlinearities in this teleconnection. However, it remains unclear if possible nonlinearities arise from the forcing strength or the forcing location in the tropical Pacific, or from factors external to the tropical Pacific. To separate these factors, an idealized model is forced with seasonally varying sea surface temperature with linearly varying strength at a fixed location. Whereas for moderate events the North Pacific response is more linear, strong events exhibit significant nonlinearity both in terms of the strength and location of the impact. The nonlinearity can be traced back to the relationship between sea surface temperature and tropical convection. Nonlinearity in the North Pacific response can have important impacts for long-range prediction and for potential changes in the diversity of ENSO with climate change.
Keywords
North Pacific, ENSO, teleconnection, nonlinearity, simplified model
Web of science
Open Access
Yes
Funding(s)
Swiss National Science Foundation / PP00P2_170523
Create date
05/04/2022 14:13
Last modification date
11/07/2024 11:03
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