Solar Quiet Current Response in the African Sector due to a 2009 Sudden Stratospheric Warming Event

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dc.contributor.authorBolaji, O.S
dc.contributor.authorOyeyemi, E.O
dc.contributor.authorOwolabi, O.P
dc.contributor.authorYamazaki, Y
dc.contributor.authorRabiu, A.B
dc.contributor.authorOkoh, D
dc.contributor.authorFujimoto, A
dc.contributor.authorAmory-Mazaudier, C
dc.contributor.authorSeemala, G.K
dc.contributor.authorYoshikawa, A
dc.contributor.authorOnanuga, O.K
dc.date.accessioned2017-11-10T11:48:13Z
dc.date.available2017-11-10T11:48:13Z
dc.date.issued2016
dc.descriptionStaff Publicationsen_US
dc.description.abstractWe present solar quiet (Sq)variation of the horizontal (H) magnetic field intensity deduced from Magnetic Data Acquisition System (MAGDAS) records over Africa during an unusual strong and prolonged 2009 sudden stratospheric warming (SSW)event. A reduction in the SqH magnitude that enveloped the geomagnetic latitudes between 21.13°N (Fayum FYM) in Egypt and 39.51"S(Durban DRB)in South Africa was observed, while the stratospheric polar temperature was increasing and got strengthened when the stratospheric temperature reached its maximum. Another novel feature associated with the hemispheric reduction is the reversal in the north-south asymmetry of the SqH, which is indicative of higher SqH magnitude in the Northern Hemisphere compared to the Southern Hemisphere during SSWpeak phase. The reversal of the equatorial electrojet (EEJ)or the counter electrojet (CEJ)was observed after the polar stratospheric temperature reached its maximum. The effect of additional currents associated with CEJwas observed in the Southern Hemisphere at middle latitude. Similar changes were observed in the EEJat the South America, Pacific Ocean, and Central Asia sectors. The effect of the SSWis largest in the South American sector and smallest in the Central Asian sector.en_US
dc.identifier.citationBolaji, O. S.,et al. (2016) Solar quiet current response in the African sector due to a 2009 sudden stratospheric warming event. Journal of Geophys. Res. Spaceen_US
dc.identifier.urihttp://ir.unilag.edu.ng:8080/xmlui/handle/123456789/2857
dc.language.isoenen_US
dc.subjectCentral Asian sectoren_US
dc.subjectPacific Oceanen_US
dc.subjectMagnetic Data Acquisition Systemen_US
dc.subjectStratospheric Temperatureen_US
dc.titleSolar Quiet Current Response in the African Sector due to a 2009 Sudden Stratospheric Warming Eventen_US
dc.title.alternativeO. S. Bolajil,2, E.O. Oyeyemil, O. P. Owolabil, Y.3, A. B. Rabiu4, D. Okoh", A. FUjimotoS, C. Amory-Mazaudier6,7, G. K.Seemala8, A. Yoshikawas, and O. K.Onanuga9en_US
dc.typeArticleen_US
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