• equatorial bubbles;
  • plasma transport;
  • ionospheric irregularities

[1] The transport equations for the motion of plasma in the equatorial ionosphere are solved using exact solutions for induced electric potentials and deformation of plasma density coordinates. The primary purpose of the quasi-analytic model is to provide an efficient description of the plasma structure in the equatorial ionosphere suitable for investigation of effects on radio wave propagation and ionospheric sensors. The analytic model of the electric fields produces incompressible motion that moves the locations of “plasma cells” but does not change the density of the plasma in each cell. This Lagrangian approach employs a time-dependent coordinate mapping of the undisturbed layer grid. Using internal electric potentials of the bubbles and external polarizations of the F layer as a whole, a transport model yields tilted plasma plumes that move through the F region. Irregularity steepening is obtained with this model. The time-dependent computer model provides useful plasma densities in a fraction of the time for fully numerical simulations.