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@Article{JesusBaJoAbFaVeDe:2017:InIoDi,
               author = "Jesus, Rodolfo de and Batista, Inez Staciarini and Jonah, Olusegun 
                         Folarin 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 {Massachusetts 
                         Institute of Technology} 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 = "An investigation of the ionospheric disturbances due to the 2014 
                         sudden stratospheric warming events over brazilian sector",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2017",
               volume = "122",
               number = "11",
                pages = "11698--11715",
                month = "Nov.",
             abstract = "The present study investigates the ionospheric F region response 
                         in the Brazilian sector due to sudden stratospheric warming (SSW) 
                         events of 2014. The data used for this work are obtained from GPS 
                         receivers and magnetometer measurements during day of year (DOY) 
                         01 to 120, 2014 at different stations in the equatorial and 
                         low-latitude regions in the Brazilian sector. In addition, the 
                         data obtained from Communication/Navigation Outage Forecasting 
                         System satellites during DOY 01 to 75 of 2014 are used. The main 
                         novelty of this research is that, during the 2014 SSW events, 
                         daytime vertical total electron content (VTEC) shows a strong 
                         increase on the order of about 23% and 11% over the equatorial and 
                         low-latitude regions, respectively. We also observed that the 
                         nighttime VTEC (SSW days) is increased by 8% and 33% over 
                         equatorial and low-latitude regions, respectively. The 
                         magnetometer measurements show a strong counterelectrojet during 
                         the SSW days. The results show an amplification of the 0.5 day and 
                         ~216 day periods in the VTEC and equatorial electrojet during the 
                         SSWs. The occurrences of ionospheric irregularities during the SSW 
                         events are around 84% and 53% in the equatorial and low-latitude 
                         regions, respectively, which is less frequent when compared with 
                         those during the pre-SSW periods.",
                  doi = "10.1002/2017JA024560",
                  url = "http://dx.doi.org/10.1002/2017JA024560",
                 issn = "2169-9402",
             language = "en",
           targetfile = "jesus_investigation.pdf",
        urlaccessdate = "26 nov. 2020"
}


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