Journal
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Volume 117, Issue -, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2011JA017453
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Funding
- Ministry of Education, Science and Culture of Japan
- Japan Society for the Promotion of Science (JSPS) [05041060, 0841105, 10041122, 12373003]
- JSPS for Young Scientists
- Grants-in-Aid for Scientific Research [12373003, 09J05068, 22840033, 23540513, 05041060, 20244076, 22253007, 10041122] Funding Source: KAKEN
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This paper describes ionospheric current systems associated with the counter-electrojet during sudden stratospheric warming (SSW) events in the northern winter months of 2001-2002 and 2002-2003. Magnetic data from 20 stations in the East Asian region, covering both the Northern Hemisphere and the Southern Hemisphere, are analyzed. Additional current systems that are superposed on the normal S-q current system and related to the counter-electrojet during the SSW events show a global semidiurnal current pattern, which shifts to later local times approximately by 0.8 hour/day. The results indicate that abnormally large lunar tidal winds played a main role to produce the additional current system and counter-electrojet during the SSW events.
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