Measurements of the dynamics of the high-latitude thermosphere

Details Measurements of the dynamics of the high-latitude thermosphere Measurements of the dynamics of the high-latitude thermosphere

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986asdy.conf..629k&link_type=abstract

IN: Astrodynamics 1985; Proceedings of the Conference, Vail, CO, August 12-15, 1985. Part 1 (A86-43201 20-12). San Diego, CA, Un

Astronomy and Astrophysics

Astronomy

Atmospheric Circulation, Atmospheric Models, Dynamics Explorer 2 Satellite, Thermosphere, Atmospheric Temperature, Geomagnetism, Wind (Meteorology)

Scientific paper

The study of the dynamics and thermodynamics of the earth's upper atmosphere has made significant progress over the past few years owing to the availability of new global-scale data sets from the Dynamics Explorer satellites. The thermospheric wind and temperature fields at high altitude have been observed to depend strongly on forcing processes of magnetospheric origin. A key momentum source is due to the drag effect of ions convecting in response to electric fields mapped down on the ionosphere from magnetospheric boundary regions. Likewise, an important heat source derives from Joule or frictional dissipation due to ion/neutral difference velocities governed by magnetospheric forcing. In this paper the progress made over the last 2-3 years initiated by the new satellite measurements is discussed, and published data on ion and neutral motions are reviewed in the context of the energy and momentum coupling between the magnetosphere and the ionosphere/neutral upper atmosphere.

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