Large field-aligned velocities observed by EISCAT

Details Large field-aligned velocities observed by EISCAT Large field-aligned velocities observed by EISCAT

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..379w&link_type=abstract

(EISCAT Scientific Association, International EISCAT Workshop, 3rd, Bad Lauterberg, Federal Republic of Germany, Mar. 23-27, 198

Physics

30

Auroral Zones, Eiscat Radar System (Europe), Geomagnetism, Polar Caps, Atmospheric Models, Ion Distribution, Ionospheric Heating, Night Sky

Scientific paper

Large upward ion fluxes are observed near the polar cap/auroral zone boundary in the midnight-dawn sector. Results from a recent model show that large upward velocities will occur in response to strong frictional heating and these results are consistent with the observations presented in this paper. There is particularly good agreement between the spatial and temporal morphology of the heating and the upward flux of ions which favors this mechanism to explain the observations. However, the time and location are also those associated with other acceleration mechanisms which cause upward motion of energized ions and these may also contribute to the large velocites observed.

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