Dynamics of the Coastal Transition Zone Jet 1. Linear stability analysis Public Deposited

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  • The linear stability of a coastal transition zone (CTZ) jet is analyzed using a six-layer quasi-geostrophic model with observed basic state velocity profiles. The velocity profiles are obtained from objectively analyzed hydrographic and acoustic doppler data from the 1987 CTZ pilot experiment. Along-jet perturbation wave-lengths of 260-265 km are found to be the most unstable, with e-folding growth periods of 7-11 days and along-jet phase speeds of 4-8 km/d downstream. Energy transformation terms and energy budgets are discussed. Both barotropic and baroclinic instability processes are important.
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  • Allen, J. S., Pierce, S. D., and Walstad, L. J. (1991) Dynamics of the Coastal Transition Zone Jet 2. Linear stability analysis, J. Geophys. Res., 96, C8.
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