Physics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36..509f&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 36, May 1988, p. 509-522.
Physics
30
Earth Ionosphere, Magnetopause, Midlatitude Atmosphere, Polar Caps, Polar Regions, Convective Flow, Radar Data, Radar Scattering, Radar Tracking, Steady State
Scientific paper
Simple quasi-global models of ionospheric flow are described, with the aim of elucidating the potential signatures of magnetopause erosion and allied phenomena at ionospheric heights. Erosion implies the addition of flux to the polar cap and consequently a reduction in the latitude of the polar cap boundary. The possibility of localized erosion over part of the dayside is considered. Systematic turning of the midlatitude flow can result to the west and east of the erosion region. After erosion, the boundary must eventually return poleward as stress is released on the nightside. The pattern associated with polar cap boundary reconfiguration is examined. This can give rise to substantial equatorward and tailward flows on closed field lines. Data from the SABRE radar system during a period in which spacecraft measurements have shown erosion is occurring are presented. Various features shown in the present models are seen.
Freeman Mervyn. P.
Southwood David J.
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