Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..93w&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 93-1, CiteID 1252, DOI 10.1029/2001GL014259
Physics
6
Oceanography: Physical: Sea Level Variations, Oceanography: General: Numerical Modeling, Information Related To Geographic Region: Pacific Ocean
Scientific paper
Satellite Altimeter observations of sea surface height show an extensive region of high variability in the Southeastern Pacific which previous studies have suggested is a Rossby wave trapped by topography. Here we investigate the feature using results from a high-resolution global ocean model. We calculate the empirical orthogonal modes and find that 29% of the SSH variability is due to a single mode. We correlate the time series of the mode with the local Ekman pumping and find that the correlation is largest when the wind curl is averaged over a region roughly the size of the mode. We calculate the response function relating the two time series and find that it is dominated by a resonance at zero frequency with a decay time of about two days. We conclude that the feature is a highly damped geostrophic mode of the ocean.
de Cuevas Beverly A.
Webb David J.
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