Simulation of the polar cap thermal plasma and comparison with EISCAT measurements

Details Simulation of the polar cap thermal plasma and comparison with EISCAT measurements Simulation of the polar cap thermal plasma and comparison with EISCAT measurements

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53..135t&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 53, Jan.-Feb. 1991, p. 135-139, 141-150.

Physics

Eiscat Radar System (Europe), Plasma Density, Polar Caps, Radar Measurement, Thermal Plasmas, Electric Fields, Ion Recombination, Radar Imagery, Spatial Distribution

Scientific paper

Due to high convection electric field values, the four differential continuity equations (with momentum equations) presently used to solve for the O(+), N(2+), O(2+), and NO(+) ions take into account a stress tensor for ionization transport along the magnetic field lines. An effective temperature is also calculated for recombination processes. An analytical expression depending on invariant latitude and on the magnetic local time is used to represent the equipotentials of the electric fields deduced from 24 hrs of EISCAT observations in the 60-72 deg invariant latitude range; these equipotentials are then extrapolated toward higher latitudes. Attention is given to the influence of the neutral wind model, and it is concluded that the morning sector's observed electron density depression is entirely due to chemical recombination.

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