Chatanika observations of the latitudinal structure of electric fields and particle precipitation on November 21, 1975

Details Chatanika observations of the latitudinal structure of electric fields and particle precipitation on November 21, 1975 Chatanika observations of the latitudinal structure of electric fields and particle precipitation on November 21, 1975

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.2743w&link_type=abstract

Journal of Geophysical Research, vol. 82, July 1, 1977, p. 2743-2751.

Other

4

Atmospheric Electricity, Auroral Zones, Electron Precipitation, Ionospheric Currents, Magnetic Disturbances, Convective Flow, Electric Fields, Incoherent Scattering, Latitude, Radar Scattering

Scientific paper

By using a new multiposition experimental procedure the incoherent scatter radar facility of Chatanika, Alaska, has been used to obtain detailed latitudinal structure of ion velocities and electric fields in the afternoon and midnight sectors during a period of moderate magnetic disturbance. In particular, the latitudinal and local time structure of the Harang discontinuity has been investigated. In agreement with other observations it is found that the convection flow direction changes from westward through south to eastward over a fairly wide local time range (1-2 hours), the highest latitudes displaying the widest region. The Harang discontinuity encounter is accompanied by an abrupt increase in electron precipitation, the most intense part being located slightly east of the center of the discontinuity. It is suggested that this injection is due to processes closely connected with the discontinuity region itself, rather than to a substorm-related energization.

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