Interpretation of enhanced electron temperatures measured in the auroral E-region during the ERRRIS campaign

Details Interpretation of enhanced electron temperatures measured in the auroral E-region during the ERRRIS campaign Interpretation of enhanced electron temperatures measured in the auroral E-region during the ERRRIS campaign

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991angeo...9...55j&link_type=abstract

Annales Geophysicae (ISSN 0939-4176), vol. 9, Jan. 1991, p. 55-59.

Physics

27

Auroral Zones, E Region, Eiscat Radar System (Europe), Electric Field Strength, Electron Energy, Electron Scattering, Magnetohydrodynamic Stability, Plasmons

Scientific paper

During the ERRRIS campaign EISCAT used alternating codes to measure electron temperatures and electric fields with better time resolution than ever possible before. Enhancements in the E-region electron temperature were observed during periods of high electric field and these have been explained by the concept of plasmon-electron interaction. Plasma waves (or plasmons) excited by the Farley-Buneman plasma instability feed energy into the ambient electron gas. With a model of this process, which also includes the effect of the neutral wind, frictional heating, heating by particle precipitation and the various cooling mechanisms important at E-region heights, the enhancement in electron temperature can be calculated and compared with the measured values. The refinements in the model and the improvements in the quality of measurement are matched by the closeness of agreement between predicted and measured values.

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