On the relationship between dynamics of the polar thermosphere and morphology of the aurora - Global-scale observations from Dynamics Explorers 1 and 2

Details On the relationship between dynamics of the polar thermosphere and morphology of the aurora - Global-scale observations from Dynamics Explorers 1 and 2 On the relationship between dynamics of the polar thermosphere and morphology of the aurora - Global-scale observations from Dynamics Explorers 1 and 2

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.2675k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, April 1, 1988, p. 2675-2692.

Computer Science

Sound

29

Atmospheric Sounding, Auroras, Polar Regions, Satellite Observation, Thermosphere, Coriolis Effect, Dynamics Explorer 1 Satellite, Dynamics Explorer 2 Satellite, F Region, Luminosity, Satellite Imagery, Wind Measurement

Scientific paper

The effect of the neutral-air circulation in the high-latitude F region on the spatial distribution of the aurora is investigated on the basis of simultaneous global-scale auroral images and neutral-wind vectors obtained over the northern polar cap by the DE 1 and DE 2 satellites in December 1981. The results are presented graphically, along with DE 2 data on the composition, ion densities, and cross-track ion drift of the neutral winds and ISEE-3 IMF measurements, and analyzed. It is found that the large-scale features of the neutral circulation follow the substorm-driven expansion and contraction of the auroral oval, and that the drag effect from ions convecting sunward extends to much lower latitudes and has a more complex morphology than that predicted by GCMs. A number of asymmetries in the flow patterns are considered in detail.

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