The excitation of ionospheric convection

Details The excitation of ionospheric convection The excitation of ionospheric convection

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53..177l&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 53, Mar.-Apr. 1991, p. 177-199.

Physics

21

Eiscat Radar System (Europe), Interplanetary Magnetic Fields, Ionospheric Currents, Magnetopause, Plasma Interactions, Space Plasmas, Atmospheric Models, Diurnal Variations, Flux Transfer Events, Momentum Transfer

Scientific paper

A review is presented of recent observations of high-latitude ionospheric plasma convection that were obtained using the EISCAT radar in the 'Polar' experiment mode.The delay in the response of dayside high-latitude flows to changes in the interplanetary magnetic field is discussed and the results show the importance for the excitation of dayside convection of the transfer of magnetic flux from the dayside into the tail lobe. Then various transient flow bursts observed in the vicinity of the dayside cusp are studied. Simultaneous optical observations of transient dayside auroras combined with radar data suggest that momentum is transferred across the magnetopause and into the ionosphere in a series of bursts, each associated with 30-80 kV voltages.

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