An eigen analysis of the interdecadal changes in the structure and frequency of ENSO mode

Details An eigen analysis of the interdecadal changes in the structure and frequency of ENSO mode An eigen analysis of the interdecadal changes in the structure and frequency of ENSO mode

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2573a&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 16, p. 2573-2576

Physics

37

Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions, Oceanography: General: Analytical Modeling, Oceanography: General: Climate And Interannual Variability, Oceanography: Physical: El Nino

Scientific paper

The mechanisms of interdecadal changes of El Niño-Southern Oscillation (ENSO) modes are examined through an eigen analysis of a simple coupled ocean-atmosphere model. It is shown that the observed interdecadal climate shift can effectively modify the strength of two major coupled feedbacks for the ENSO mode, namely, the zonal advection and thermocline feedbacks. These modifications lead to quantitative changes of the leading coupled mode in its frequency, growth rate, and spatial pattern, which are consistent with the observation.

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