Morphology of the equatorial ionization anomaly in Africa and Middle East due to a sudden stratospheric warming event

Bolaji, O. S.; Oyeyemi, E. O.; Jimoh, Oluwaseyi; Fujimoto, Akiko; Doherty, Patricia H.; Owolabi, Oluwafisayo; Adeniyi, J.O.; Falayi, E.O.; Abe, Eiji; Kaka, R. O.; Kotoye, Afolabi

doi:10.1016/j.jastp.2019.01.006

Cited by 8 publications

(10 citation statements)

References 55 publications

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“…In addition, this study used EEJ current to infer the vertical E × B drift during the SSW events (Anderson et al., 2002, 2004; Bolaji et al., 2019; Rabiu et al., 2017; Yizengaw et al., 2014). This sampled one‐minute horizontal magnetic field intensity data obtained from the African Meridian B‐Field Education and Research, AMBER (http://magnetometers.bc.edu/), International Real‐time Magnetic Observatory Network, INTERMAGNET (http://www.intermagnet.org) and the Low Ionospheric Sensor Network, LISN (http://lisn.igp.gob.pe/jdata) were used to determine EEJ ( nT ).…”

Section: Data and Methods Of Analysismentioning

confidence: 99%

“…Bolaji et al. (2019) reported negative responses of Equatorial Electrojet (EEJ) current strength and Total Electron Content (TEC) to same 2009 SSW peak phase. In the American sector, several studies have linked ionospheric TEC modulations to SSW events (e.g., de Jesus, Batista, de Abreu, et al., 2017; de Jesus, Baptista, Fagundes, et al., 2017; de Jesus, Baptista, Jonah, et al., 2017; Fagundes et al., 2015; Goncharenko, Chau, et al., 2010; Goncharenko, Coster, et al., 2010; Liu et al., 2011; Vieira et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Focusing on the low-latitude solar quiet (Sq) current response to January 2009 SSW event in Africa, Bolaji et al (2016) showed that the Sq current in the Northern Hemisphere (NH) was more intense than the Southern Hemisphere (SH) during the SSW peak phase. Bolaji et al (2019) reported negative responses of Equatorial Electrojet (EEJ) current strength and Total Electron Content (TEC) to same 2009 SSW peak phase. In the American sector, several studies have linked ionospheric TEC modulations to SSW events (e.g., de Jesus, Batista, de Jesus, Baptista, Jonah, et al, 2017;Fagundes et al, 2015;Liu et al, 2011;Vieira et al, 2017).…”

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confidence: 99%

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African and American Equatorial Ionization Anomaly (EIA) Responses to 2013 SSW Event

2022

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This study investigates the responses of the African and American Equatorial Ionization Anomaly (EIA) regions to 2013 Sudden Stratospheric Warming (SSW) event. The Total Electron Content (TEC) data obtained from chains of Global Positioning System receivers within ±40° geomagnetic latitudes in the African and American sectors were used to construct the EIA structures for both longitudinal sectors. The responses of the EIA structures, constructed from the TEC, ΔTEC, and ionospheric irregularities data to the 2013 SSW event were investigated. During the SSW peak phase, EIA structures in both longitudinal sectors responded significantly, with the pole‐ward flow of plasma from the equator to higher crests' locations (strengthening of the EIA). Furthermore, a clear asymmetry in plasma distribution in the northern and southern crests of the EIA was observed. Generally, for the entire data span, TEC enhancements and ionospheric irregularities occurrences during SSW were more in the American sector than the African sector. The geomagnetic activity of 17 January 2013 caused negative TEC response in the African sector and positive TEC response in the American sector. Moderate storm‐induced TEC enhancements were generally lower than SSW‐induced TEC enhancements. Furthermore, solar flux‐induced TEC of 10 January 2013 was lesser than the SSW‐induced TEC of 15–16 January 2013.

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Section: Data and Methods Of Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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African and American Equatorial Ionization Anomaly (EIA) Responses to 2013 SSW Event

2022

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“…Photovoltaic systems are the most promising renewable energy source in north Africa and Middle-East due to its abundant solar irradiation [1][2][3]. PV systems classified in three main types; stand-alone, hybrid and grid connected PV system as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Performance of grid-connected solar photovoltaic power plants in the Middle East and North Africa

Assadeg¹,

Sopian²,

Fudholi³

2019

IJECE

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A conceptual design Study of a solar electrical power system using PV array for a 5.3MW as nominal power required is presented. A Bird model has been used to estimate hourly, daily, monthly and yearly solar radiation amounts. f-f-chart is a design method was chosen to simulate the fraction of the solar energy required for the load given the PV array areas and climatic conditions. Four cities in the Middle East and North Africa representing different locations at southern Mediterranean region are selected Tripoli, Alexandria, Tunisia and Gaza city. Tripoli City has the best performance for 73% of nominal Power followed by Alexandria about 66% and then Gaza around 63%, Tunisia City has lowest solar fraction about 59% according to the Monthly and annual solar fraction Data.

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“…Recently, during Norther Hemisphere winter, the equatorial big L days are often related to the occurrence of stratospheric sudden warming events [2,3]. The role of lunar tidal magnetic variation involving SSWs have been reported by several researchers [4][5][6][7][8][9]. The semidiurnal lunar tidal magnetic variation, caused by L current system, can be a cause of the counter electrojet (CEJ), if the semidiurnal variation relatively large or daily Sq variation is weak.…”

Section: Introductionmentioning

confidence: 99%

Seasonal dependence of semidiurnal equatorial magnetic variation during quiet and disturbed periods

et al. 2019

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The analysis of 20-year long-term semidiurnal lunar tidal variations gave the evidence that the semidiurnal variations are completely different between the magnetic quiet and disturbed periods. This is the first time that the seasonal dependence of disturbance-time semidiurnal variation has been provided from the analysis of the EE-index. We found the Kp dependence of semidiurnal variation: For full and new moon phase, counter troughs are amplified during disturbance time, possibly related to disturbance dynamo. For all moon phase, there are positive enhancements in dawn and strong depressions after sunset, resulting from the penetration of polar electric filed. For Seasonal dependence, semidiurnal variations are divided to three seasonal groups, and characterized as deep trough, enhanced crest and weak structure for D-solstice, Equinoxes and J-solstice, respectively. There is no significant longitudinal difference between Ancon and Davao, except for the amplitude of semidiurnal variations. The deep troughs occur during D-solstice and the enhanced crests during Equinoxes, at both Ancon and Davao.

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Morphology of the equatorial ionization anomaly in Africa and Middle East due to a sudden stratospheric warming event

Cited by 8 publications

References 55 publications

African and American Equatorial Ionization Anomaly (EIA) Responses to 2013 SSW Event

African and American Equatorial Ionization Anomaly (EIA) Responses to 2013 SSW Event

Performance of grid-connected solar photovoltaic power plants in the Middle East and North Africa

Seasonal dependence of semidiurnal equatorial magnetic variation during quiet and disturbed periods

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