Permanent Meanders in the California Current System and Comparison of Near-Surface Observations with OGCM Solutions. Luca Centurioni (SIO-PORD). Collaborators: Peter Niiler, Carter Ohlmann.
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Collaborators: Peter Niiler, Carter Ohlmann
Acknowledgments (PI):Harley Hurlburt (NLOM), Julie McClean (POP), Jim McWilliams (ROMS), Ruth Preller (HYCOM)
Vector correlation and scatter plots of “geostrophic” velocity residuals from drifters and AVISO
FROM CORRECTED ALTIMETRY
Conclusions1)Data confirm that the CCS (during the last 10 years and in the area examined) had 4 permanent meanders which are co-located with jets of zonal flow that extend nearly to Hawaii;2)Time biases from the drifter data can be removed with the aid of satellite altimetry; Comparison of observed quantities with OGCM outputs can be addressed;3)Preliminary comparisons show that ROMS is likely to be the model with the highest degree of realism;
Ageostrophic, non-linear velocity in ROMS and simple GFD model of cold eddy interacting with wind (Lee et al 1998)
MEAN EKE0.5 at 15 m DEPTH (from drifters)
And use the following barotropic model to compute the stream function of volume transport per unit depth:
Acceleration of a drifter:
Consider a one layer ocean of depth D=D0+D’ with a wind stress t acting over it:
The stream function of the mass transport can be computed as: