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Cited by 50Climate variability and modelsMeteorological Phenomena and SimulationsGeology and Paleoclimatology Research

Role of the atmosphere in seasonal phase locking of El Niño

Spencer, Hilary·2004·Geophysical Research Letters
DOI 10.1029/2004gl021619
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Abstract

The variations with the seasonal cycle of the atmospheric response to constant SST anomalies in the eastern tropical Pacific are investigated with the atmospheric GCM, HadAM3. The equatorial wind response is weakest in January and February when the warmest SSTs are south of the Equator and strongest in April when the warmest SSTs are on the Equator. This may have consequences for the seasonality of the onset and termination of El Niño. Westerly wind anomalies in the tropical Pacific associated with El Niño have previously been observed to shift south of the Equator, weakening on the Equator, during the northern winter. It has been suggested that this may contribute to the termination of El Niño in spring. These experiments demonstrate that such a shift can arise solely in response to the mean seasonal cycle during El Niño and does not require changes in SST anomalies.

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Crossref · 10.1029/2004gl021619

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14 of 14 references verified0 citation errors · 0 not checkable

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  • Although not strictly phase-locked to the annual cycle, there is an observed tendency for the warm ENSO phase in the Pacific to develop in Boreal summer or autumn and peak in boreal winter.

    “Although not strictly phase-locked to the annual cycle, there is an observed tendency for the warm ENSO phase in the Pacific to develop in Boreal summer or autumn and peak in boreal winter63–65.”

    From Tendencies, variability and persistence of sea surface temperature anomalies (2020) · cites this paper as [65]

  • El Nino tends to be a single-year event, with equatorial Pacific SST anomalies decaying in boreal spring (March to May).

    “El Nino tends to be a single-year event, with equatorial Pacific SST anomalies decaying in boreal spring (March to May)55,63,65.”

    From Tendencies, variability and persistence of sea surface temperature anomalies (2020) · cites this paper as [65]

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Authors
Spencer, H.
Affiliations
University of Reading (GB)
Corresponding author
Spencer, Hilary
Venue
Geophysical Research Letters
Publisher
American Geophysical Union (AGU)
Published
2004-12
Volume
31
Issue
24
ISSN
  • 0094-8276 (ISSN-L)
  • 1944-8007
DOI
10.1029/2004gl021619
OpenAlex
W1982949703
Cited by
50
References
14
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2022: 2 · 2021: 3 · 2020: 2 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 6 · 2014: 4 · 2013: 2 · 2012: 2
FWCI
2.72
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 28 d)
Locations
Geophysical Research Letters (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
Keywords
El Niño, seasonal phase locking, sea surface temperature anomalies, eastern tropical Pacific, westerly wind anomalies, HadAM3

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