Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsa41c..02a&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SA41C-02
Physics
0310 Airglow And Aurora, 2407 Auroral Ionosphere (2704), 2431 Ionosphere/Magnetosphere Interactions (2736)
Scientific paper
Dayside Aurora has been continuously (24 hour) monitored from South Pole during six month of polar winter night, from mid April to mid September. Oscillating auroral phenomenon has been observed via a 6-channel photometer scanning along the magnetic meridian towards the magnetic pole and a CCD spectrograph (CCDS) operating in the near-infrared (700nm - 960 nm) region along the local magnetic zenith. In this paper we present the dynamics of 630 nm and 844.6 nm auroral emission lines in the dayside aurora (in the 1200-1800 MLT sector) in response to modulations in the interplanetary magnetic field (IMF). Examination of CCDS and meridian scanning photometer data shows intensification of both the red (630.0 nm) and OI (844.6) line emissions in the cusp region near 1200 MLT accompanied by modulation of the line intensity at a period of 10-25 minutes. The associated IMF disturbance also shows 10-25 minute period pulsations. These observations of red and OI line emissions and IMF pulsations are discussed within the context of magnetosphere-ionosphere (MI) coupling.
Azeem I.
McEwen Don J.
Sivjee G. G.
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