Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10176
AuthorsFagundes, P. R.* 
Goncharenko, L. P.* 
de Abreu, A. J.* 
Venkatesh, K.* 
Pezzopane, M.* 
de Jesus, R.* 
Gende, M.* 
Coster, A. J.* 
Pillat, V. G.* 
TitleIonospheric response to the 2009 sudden stratospheric warming over the equatorial, low, and middle latitudes in the South American sector
Issue Date2015
Series/Report no.9/120 (2015)
DOI10.1002/2014JA020649
URIhttp://hdl.handle.net/2122/10176
Keywordssudden stratospheric warming
equatorial, low, and middle latitude ionosphere
GPS
ionosonde
TEC
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.99. General or miscellaneous 
01. Atmosphere::01.01. Atmosphere::01.01.04. Processes and Dynamics 
01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous 
01. Atmosphere::01.02. Ionosphere::01.02.02. Dynamics 
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 
01. Atmosphere::01.02. Ionosphere::01.02.06. Instruments and techniques 
AbstractThe present study investigates the ionospheric total electron content (TEC) and F-layer response in the Southern Hemisphere equatorial, low, and middle latitudes due to major sudden stratospheric warming (SSW) event, which took place during January–February 2009 in the Northern Hemisphere. In this study, using 17 ground-based dual frequency GPS stations and two ionosonde stations spanning latitudes from 2.8°N to 53.8°S, longitudes from 36.7°W to 67.8°W over the South American sector, it is observed that the ionosphere was significantly disturbed by the SSW event from the equator to the midlatitudes. During day of year 26 and 27 at 14:00 UT, the TEC was two times larger than that observed during average quiet days. The vertical TEC at all 17 GPS and two ionosonde stations shows significant deviations lasting for several days after the SSWtemperature peak. Using one GPS station located at Rio Grande (53.8°S, 67.8°W, midlatitude South America sector), it is reported for the first time that the midlatitude in the Southern Hemisphere was disturbed by the SSW event in the Northern Hemisphere.
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