A New Frontal Instability: Theory and ERICA Observations (original) (raw)

Journal of the Atmospheric Sciences, 1994

Abstract

Abstract A short-wave instability theory is applied to secondary waves on a narrow cold-front rainband observed during the Experiment on Rapidly Intensifying Cyclones over the Atlantic (ERICA). The basic mean state is approximated by the parabolic, geostrophically balanced interface between two layers of homogeneous density. The observed wavelength of perturbations along the ERICA cold front is about 20-30 km and their doubling time is about 2 hours. The observed wavelength is well within the short-wave regime of the theory, ...

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