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Theoretical and Applied Climatology

, Volume 129, Issue 1–2, pp 171–176 | Cite as

Changes in the zonal propagation of El Niño-related SST anomalies: a possible link to the PDO

  • Pablo L. AnticoEmail author
  • Vicente R. Barros
Original Paper

Abstract

Long-term variability of El Niño (EN) cycle has been the topic of several studies, mainly because of its impacts on climate around the globe. This variability has been mainly described by changes in the intensity and frequency of EN events. In this study, interdecadal changes in the zonal evolution of EN-related sea surface temperature anomalies (SSTA) and their possible link with a well-known mode of Pacific interdecadal variability are analyzed. EN events are classified according to the sense of zonal propagation of SSTA along the equatorial Pacific during the period 1900–2012. As a result, two types of EN are defined: eastward-directed and westward-directed EN. It is found that EN-related SSTA preferably evolves to the east (west) during the warm (cold) phase of the Pacific Decadal Oscillation. Hence, this study offers new insights into the possible causes of long-term EN changes.

Keywords

Pacific Decadal Oscillation Zonal Propagation Equatorial Pacific Ocean Pacific Decadal Oscillation Index Pacific Decadal Oscillation Phase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The gridded NOAA_ERSST_V3 dataset was provided by the NOAA/OAR/ESRL PSD, Boulder, CO, USA, at http://www.esrl.noaa.gov/psd/. Time series of the PDO index were provided by the Nate Mantua Web site at JISAO (http://jisao.washington.edu/pdo/). This study was partially supported by grant PICT-2007-00400 from the National Scientific and Technological Agency (ANPCyT) and grant PIP 112-20080-00444 from the National Research Council (CONICET), Argentina.

Supplementary material

704_2016_1766_MOESM1_ESM.pdf (46 kb)
ESM 1 (PDF 46 kb)

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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  1. 1.Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
  2. 2.Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires, Ciudad UniversitariaBuenos AiresArgentina
  3. 3.Facultad de Ciencias Astronómicas y GeofísicasUniversidad Nacional de La PlataLa PlataArgentina
  4. 4.Centro de Investigaciones del Mar y de la Atmósfera, Intendente Güiraldes 2160Ciudad UniversitariaBuenos AiresArgentina

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