Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa34a..05n&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA34A-05
Physics
[2407] Ionosphere / Auroral Ionosphere, [2411] Ionosphere / Electric Fields, [2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2730] Magnetospheric Physics / Magnetosphere: Inner
Scientific paper
Temporal oscillations of the SAPS/SAID structures observed by the SuperDARN Hokkaido radar (AACGM latitude= 36.5 degs) have been studied for Nov. 2006 to Aug. 2010. They have time scale ranging from about 2 min to more than 1 hour. Oscillations with short (2 min) time scale are due to the Pi2 pulsation, and those with medium (15 to 30 min) scale are attributable to the plasma instabilities in the inner magnetosphere. On the other hand, origin of the periodic oscillations with long (about 1 hour) time scale is not clear. Sometimes they have changes similar to variations in AL indices, although the long-period oscillations appear also under quiet geomagnetic conditions. Possible origin of those oscillations in the SAPS/SAID structures will be discussed.
Ebihara Yasuhiro
Hori Toshihiro
Hosokawa Kazuo
Kataoka Ryuho
Kikuchi Tatsuru
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