Equatorial Kelvin Waves Do Not Vanish

James J. O'brien Mesoscale Air-Sea Interaction Group. Florida State University, Tallahassee, Florida

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Fred Parham Mesoscale Air-Sea Interaction Group. Florida State University, Tallahassee, Florida

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Abstract

In the last several years many scientists have been using poorly resolved coupled models to study the El Niño- Southern Oscillation (ENSO). It has been very common to state that an ENSO cycle found in a model cannot have oceanic Kelvin waves as a mechanism because such waves do not exist in an ocean model with coarse grid spacing. In this note we demonstrate that equatorial Kelvin waves can exist in models with coarse grids.

Abstract

In the last several years many scientists have been using poorly resolved coupled models to study the El Niño- Southern Oscillation (ENSO). It has been very common to state that an ENSO cycle found in a model cannot have oceanic Kelvin waves as a mechanism because such waves do not exist in an ocean model with coarse grid spacing. In this note we demonstrate that equatorial Kelvin waves can exist in models with coarse grids.

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