Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora

Details Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417223w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17223-17233. Research supported by NFR and SERC.

Physics

15

Auroral Ionization, Eiscat Radar System (Europe), Electron Precipitation, Energy Storage, Electron Plasma, Elementary Particle Interactions, High Resolution, Plasma Waves, Wave Interaction

Scientific paper

Very thin auroral ionization layers of less than 4.5 km extent have been identified in high-resolution EISCAT data during an event of pulsating aurora on December 3, 1986. The auroral forms were recorded by a monostatic TV camera system at the EISCAT site. The structures in the altitude profiles of electron density were found to be thinner than would be expected from collisional energy deposition of a monoenergetic and monodirectional precipitation of electrons. It is shown that these ionization layers are probably associated with enhanced aurora (Hallinan et al., 1985). The measurements suggest that the precipitating electrons lose some of their energy by wave-particle interaction with large-amplitude plasma waves in a confined ionospheric altitude region situated at altitudes around 100-120 km. The ionospheric plasma waves in the electron plasma frequency range might then accelerate ambient ionospheric electrons above the ionization threshold of the neutral gas, leading to enhanced secondary ionization. Such a process would involve high electric field amplitudes.

Affiliated with

Also associated with

No associations

Rating

Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of thin auroral ionization layers by EISCAT in connection with pulsating aurora will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1572671