Geostrophicity of long-wave disturbances in the ionosphere

Details Geostrophicity of long-wave disturbances in the ionosphere Geostrophicity of long-wave disturbances in the ionosphere

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ge%26ae..25..229g&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 25, Mar.-Apr. 1985, p. 229-232. In Russian.

Physics

Geostrophic Wind, Ionospheric Disturbances, Planetary Waves, Polar Regions, Tropical Regions

Scientific paper

A theory of quasi-geostrophic (QGS) and quasi-ageostrophic (QAGS) motions of the conducting atmosphere at ionospheric heights is developed on the basis of methods of similarity theory as applied to Rossby-wave disturbances. It is shown that the effect of ionospheric plasma on large-scale wave motions (inductive deceleration and magnetic twisting) produces a significant increase in Rossby number with height and qualitatively changes the character of the dependence of the Rossby number on the linear wave-disturbance scale, beginning at 110 km and above. Motions in the high-latitude and midlatitude ionosphere are QGS, while motions at low latitudes are QAGS. The character of the large-scale wave motions depends significantly on the wave time scale.

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