Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.5202z&link_type=abstract
Journal of Geophysical Research, vol. 87, July 1, 1982, p. 5202-5206.
Physics
21
Electric Fields, Geomagnetism, Ionospheric Drift, Magnetic Disturbances, Polar Regions, Atmospheric Circulation, Convective Flow, E Region, Flow Distribution
Scientific paper
The patterns of ionospheric electron drift velocities at high latitudes have been determined during 18 magnetically disturbed days using observations made with the STARE system. These patterns have been compared with those which are characteristic for magnetically quiet days determined from 11 days of STARE measurements. The changes from magnetic quiet to active times are: (1) the electric field magnitude increases; (2) the average location of the field maximum moves to lower latitudes; (3) the maximum field occurs closer to noon in both the morning and afternoon cell; (4) the maximum electric field, which is observed after midnight during quiet days, is observed during the afternoon instead; (5) the morning convection cell increases; and (6) the reversal from westward to eastward directed electron drifts and vice versa occurs earlier in local time. All these trends become increasingly clear as the Kp index increases.
Nielsen Edward
Zi Minyun
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