On the variability of ENSO at millennial timescales

Details On the variability of ENSO at millennial timescales On the variability of ENSO at millennial timescales

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3517702w&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 17, CiteID L17702

Physics

Geophysics

4

Paleoceanography: El Nino (4522), Mathematical Geophysics: Persistence, Memory, Correlations, Clustering (3265, 7857), Nonlinear Geophysics: Scaling: Spatial And Temporal (1872, 3270, 4277), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Mathematical Geophysics: Time Series Analysis (1872, 4277, 4475)

Scientific paper

We present an analysis of a proxy ENSO record spanning the last 11,000 years and we investigate its scaling properties. We find that the data exhibit positive long-term correlations (persistence) which extend to timescales up to half a millennium. This will indicate that a given ENSO state (El Nino or La Nina) may dominate the tropical Pacific for centuries. This provides new information on ENSO dynamics and its worldwide effects and opens new questions as to the kinds of mechanisms are responsible for these long-term correlations.

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