Computer Science
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dyato..38..173g&link_type=abstract
Dynamics of Atmospheres and Oceans, Volume 38, Issue 3-4, p. 173-193.
Computer Science
5
Scientific paper
A three-dimensional spectral analysis of Topex altimeter data reveals a large meridional component ky of the wavevector k for baroclinic Rossby waves of all timescales. Its existence necessitates some refinements in our estimates of certain basic properties of the Rossby wave field. In particular, by taking into account an actual off-zonal direction of k (often exceeding 70°), one finds that the wavelength, phase speed, and group velocity of mid-latitude Rossby waves (with periods less than 2 years) are much smaller than they appear to be on the assumption of a purely zonal wavenumber vector. Because of a shorter wavelength (yielding kL as high as 0.6, where L is the Rossby radius of deformation), these waves are essentially dispersive. Their group velocity vector may depart from zonal by more than 30°. An important intrinsic feature of the wave spectrum confirmed by our analysis is a broad-band distribution with respect to ky. Some of the dynamical implications of the large ky/kx ratio are discussed.
Glazman Roman E.
Weichman Peter B.
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