Simulation of the plasma density in the polar cap F-region with a convection field obtained from EISCAT observations

Details Simulation of the plasma density in the polar cap F-region with a convection field obtained from EISCAT observations Simulation of the plasma density in the polar cap F-region with a convection field obtained from EISCAT observations

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989angeo...7..355t&link_type=abstract

Annales Geophysicae (ISSN 0980-8752), vol. 7, Aug. 1989, p. 355-363.

Physics

1

F Region, Plasma Density, Polar Caps, Radar Measurement, Space Plasmas, Arctic Regions, Atmospheric Ionization, Density Measurement, Eiscat Radar System (Europe), Positive Ions

Scientific paper

A spectral method has been used to solve the momentum equation and four differential equations corresponding to the O(+), O2(+), N2(+), and NO(+) ions in order to study the thermal plasma of the polar cap F-region. The model takes into account solar production, chemical recombinations, transportation of the ionization due to diffusion, the neutral wind, and the electric field. The intense electric field at high latitudes is shown to accelerate the ions and produce an anisotropy of the plasma, requiring the introduction of the gradient of a stress tensor in the diffusion operator. The ions and electrons drift along the equipotentials of the convection field, which is determined from EISCAT measurements of the three velocity components obtained in the June 16-17, 1982 period. Parameters responsible for discrepancies between the EISCAT observations and the model data are identified.

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