Statistical analysis of outflow ionospheric O+ on the declining phase of solar cycle 23 using Fast observations

Based on the Fast/TEAMS observations in southern hemisphere from 2000 to 2005 on the declining phase of the solar activity cycle 23, the following questions were comparatively discussed during magnetically quiet times (Kp≤2+) and storms (Kp≥3+). One was the hemispheric distribution characteristics o...

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Bibliographic Details
Published in:Planetary and space science 2014-10, Vol.101, p.170-180
Main Authors: Zhao, Kai, Jiang, Yong, Ding, Liu-Guan, Huang, Lin-Feng
Format: Article
Language:English
Subjects:
Altitude
Auroral oval
Correlation
Geomagnetic storms
Invariants
Ionospheric outflow O
Ions energy
Low energy
Outflow
Polar cusps
Solar activity
Storms
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Summary:Based on the Fast/TEAMS observations in southern hemisphere from 2000 to 2005 on the declining phase of the solar activity cycle 23, the following questions were comparatively discussed during magnetically quiet times (Kp≤2+) and storms (Kp≥3+). One was the hemispheric distribution characteristics of O+ outflow rates and net outflow differential fluxes, and the other one was the characteristics of outflow ions, which were yielded in terms of correlations with the altitude, year and magnetic local time (MLT). Results showed that the outflow events during storms were mainly scattered on magnetic invariant latitude (ILAT) from 50° to 70° which was lower than that from 60° to 70° ILAT during quiet times. The high occurrence areas turned up on the auroral oval area at 00:00–07:00 MLT before dawn and 16:00–24:00 MLT before midnight. There were remarkable low energy outflow O+ (
ISSN:0032-0633
1873-5088
DOI:10.1016/j.pss.2014.07.003