Physics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3603609i&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 3, CiteID L03609
Physics
4
Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Physical: Eastern Boundary Currents, Oceanography: Physical: Sea Level: Variations And Mean (1222, 1225, 1641), Hydrology: Time Series Analysis (3270, 4277, 4475)
Scientific paper
A discrete wavelet transform was applied to satellite altimetry data for the period 1992-2007 off California to decompose the SSH signal into inter-annual, annual, semi-annual and shorter period components. For the lowest frequency (inter-annual) component, a system of alternating quasi-zonal jets was detected. The jet system was delineated by a north-south series of quasi-zonal bands of co-rotating eddies; that is, the eddies were embedded in a shearing zonal flow. The direction of eddy rotation alternated between adjacent bands. The temporal behavior of the jet system showed the existence of quasi-stationary states and transitions between them. Observed non-linear effects of the evolution of the jets included southward drift at about 0.2 cm sec-1, deviations of the jets from the zonal direction, and re-forming of the jet system through decay and merging of eddy chains.
Collins Charles Aloysius
Ivanov Leonid M.
Margolina T. M.
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