Theory of magnetized Rossby waves in the ionospheric E layer

Details Theory of magnetized Rossby waves in the ionospheric E layer Theory of magnetized Rossby waves in the ionospheric E layer

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10905302k&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue A5, CiteID A05302

Physics

11

Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Ionospheric Dynamics, Ionosphere: Modeling And Forecasting, Ionosphere: Plasma Waves And Instabilities, Ionosphere: Electric Fields (2712)

Scientific paper

For the weakly ionized E layer plasma, a generalized Charney-Obukhov equation for magnetized Rossby waves is derived. This magnetized Rossby wave is produced by the dynamo electric field and represents the ionospheric generalization of tropospheric Rossby waves in a rotating atmosphere by the spatially inhomogeneous geomagnetic field. The basic characteristics of the wave are given. The modified Rossby velocity and Rossby-Obukhov radius are introduced. The mechanism of self-organization into solitary vortical nonlinear structures is examined. The mechanism of a self-organization of solitary structures is the result of the mutual compensation of wave dispersion and interaction through the scalar and Poisson bracket convective nonlinearities in the nonlinear wave equation. As a result, the solitary structures are anisotropic, containing a circular vortex superimposed on a dipole perturbation. The degree of anisotropy sharply increases when the vortex size approaches the so-called intermediate geostrophic size.

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