Plasma bubbles near the dawn terminator in the topside ionosphere

Details Plasma bubbles near the dawn terminator in the topside ionosphere Plasma bubbles near the dawn terminator in the topside ionosphere

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1187b&link_type=abstract

Planetary and Space Science, vol. 27, Sept. 1979, p. 1187-1193.

Physics

9

Bubbles, Magnetohydrodynamic Stability, Plasma Equilibrium, Terminator Lines, Upper Ionosphere, Atmospheric Models, Decoupling, Diffusion, Electric Fields, Ionospheric Conductivity, Ionospheric Currents, Nonlinearity, Rayleigh Waves, Taylor Instability

Scientific paper

The physical properties of plasma bubbles in the topside ionosphere near the dawn terminator are investigated. It is assumed that the bubbles result from either a Rayleigh-Taylor or an ExB instability on the bottom side of the F-layer. While the E-region is in darkness, the top and bottomsides of the ionosphere are electrically decoupled and the motion of bubbles can be described by non-linear, two-dimensional theory. After sunrise, electric fields within the bubbles discharge through the conducting lower ionosphere. The upward drift of the bubbles is effectively halted. To achieve a dayside state of diffusive equilibrium the bubbles slowly begin to collapse from the bottom.

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