The influence of ENSO on the generation of decadal variability in the North Pacific

Soon Il An, Jong Seong Kug, Axel Timmermann, In Sik Kang, Oliver Timm

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This diagnostic study explores the generation of decadal variability in the North Pacific resulting from the asymmetry of the El Niño-Southern Oscillation phenomenon and the nonlinearity of the atmospheric tropical-extratropical teleconnection. Nonlinear regression analysis of the North Pacific sea surface temperatures and atmospheric fields with respect to the ENSO index reveals that the main teleconnection centers shift between El Niño and La Niña years. This asymmetry in the ENSO response, together with the skewed probabilistic distribution of ENSO itself, may contribute to the generation of the long-term decadal variability of sea surface temperatures in the extratropical North Pacific. It is argued that this hypothesis may explain the significant variance of the observed Pacific decadal oscillation in the extratropics.

Original languageEnglish
Pages (from-to)667-680
Number of pages14
JournalJournal of Climate
Issue number4
Publication statusPublished - 2007 Feb 15


All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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