A lagged warm event-like response to peaks in solar forcing in the Pacific Region

The forced response coincident with peaks in the 11-yr decadal solar oscillation (DSO) has been shown to resemble a cold event or La Niña - like pattern during December - February (DJF) in the Pacific region in observations and two global coupled climate models. Previous studies with filtered observational and model data have indicated that there could be a lagged warm event or El Niño - like response following the peaks in the DSO forcing by a few years. Here, observations and two climate model simulations are examined, and it is shown that dynamical coupled processes initiated by the response in the tropical Pacific to peaks in solar forcing produce wind-forced ocean Rossby waves near 5°N and 5°S. These reflect off the western boundary, producing downwelling equatorial Kelvin waves that contribute to transitioning the tropical Pacific to a warm event or El Niño - like pattern that lags the peaks in solar forcing by a few years.

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Copyright 2009 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work.
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Author Meehl, Gerald
Arblaster, Julie
Publisher UCAR/NCAR - Library
Publication Date 2009-07-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:57:19.037471
Metadata Record Identifier edu.ucar.opensky::articles:15356
Metadata Language eng; USA
Suggested Citation Meehl, Gerald, Arblaster, Julie. (2009). A lagged warm event-like response to peaks in solar forcing in the Pacific Region. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7df6s78. Accessed 19 March 2025.

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