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@Article{JesusBaAbFaVeDe:2017:ObEfEq,
               author = "Jesus, Rodolfo de and Batista, Inez Staciarini and Abreu, A. J. de 
                         and Fagundes, P. R. and Venkatesh, K. and Denardini, Clezio 
                         Marcos",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Universidade do 
                         Vale do Para{\'{\i}}ba (UNIVAP)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Observed effects in the equatorial and low-latitude ionosphere in 
                         the South American and African sectors during the 2012 minor 
                         sudden stratospheric warming",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2017",
               volume = "157/158",
                pages = "78--89",
                month = "May",
             keywords = "Equatorial ionospheric irregularities, Ionosphere, Sudden 
                         stratospheric warming.",
             abstract = "In this paper, the effects of a minor sudden stratospheric warming 
                         (SSW) event of 2012 in the ionosphere over South American and 
                         African sectors have been studied using C/NOFS satellite data and 
                         GPS observations. Also, the magnetometer measurements obtained at 
                         two stations in the equatorial and low-latitude regions in the 
                         South American sector are presented. There were significant 
                         Vertical Total Electron Content (VTEC) depletions in the afternoon 
                         in both South American and African sectors during the 2012 minor 
                         SSW event. A novel feature of the present study is the reduction 
                         of the quasi 16-day oscillation (periods ranging from 11 to 20 
                         days) in the daily averaged VTEC in the Brazilian and African 
                         sector during an SSW event. Also, the results for the Brazilian 
                         sector show an amplification of the ~26 day period in the daily 
                         averaged VTEC at equatorial and low-latitude regions, after the 
                         SSW temperature peak. This investigation shows that a minor SSW 
                         can affect the irregularities at ionospheric heights in the 
                         Brazilian and African sectors. Ground-based magnetometer 
                         measurements in the American sector shows strongly enhanced 
                         equatorial electrojet (EEJ) after the SSW temperature peak.",
                  doi = "10.1016/j.jastp.2017.04.003",
                  url = "http://dx.doi.org/10.1016/j.jastp.2017.04.003",
                 issn = "1364-6826",
             language = "en",
           targetfile = "jesus_observed.pdf",
        urlaccessdate = "04 dez. 2020"
}


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