author = "Abreu, A. J. de and Martin, I. M. and Fagundes, P. R. and 
                         Venkatesh, K. and Batista, Inez Staciarini and Jesus, Rodolfo de 
                         and Rockenback, Marlos and Coster, A. and Gende, M. and Alves, M. 
                         A. and M., Wild.",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} 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)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Massachusetts Institute of Technology 
                         (MIT)} and {Universidad Nacional de La Plata (UNLP)} and 
                         {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Rutherford Appleton Laboratory}",
                title = "Ionospheric F-region observations over American sector during an 
                         intense space weather event using multi-instruments",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2017",
               volume = "156",
                pages = "1--14",
                month = "Apr.",
             keywords = "Geomagnetic storm, Ionosphere, Ionospheric irregularities, Space 
             abstract = "The critical interaction between the magnetosphere and ionosphere 
                         during intense geomagnetic storms continues to be important to 
                         space weather studies. In this investigation, we present and 
                         discuss the ionospheric F-region observations in the equatorial, 
                         low- and mid-latitude regions in both hemispheres over American 
                         sector during the intense geomagnetic storm on 0103 June 2013. The 
                         geomagnetic storm reached a minimum Dst of \−119 nT at 0900 
                         UT on 01 June. For this investigation, we present vertical total 
                         electron content (VTEC) and phase fluctuations (in TECU/min) from 
                         a chain of 10 GPS stations and the ionospheric parameters foF2 and 
                         h\′F from a chain of 4 digital ionosonde stations, covering 
                         from equatorial to mid-latitudes regions over American sector 
                         during the entire storm-time period 31 May03 June 2013. In 
                         addition, the plasma density observed from DMSP satellites is 
                         presented. The results obtained show that during the sudden 
                         impulse/SSC and throughout the main phase of the storm, a large 
                         positive phase was observed in mid-latitudes of the northern 
                         hemisphere, which could be due to changes in the thermospheric 
                         wind circulation. On the other hand, in the mid-latitudes of the 
                         southern hemisphere, no deviations are observed in VTEC and foF2 
                         when compared to the quiet period. During the long recovery phase 
                         of the storm on 0102 June, a north-south asymmetry is observed in 
                         the F-region. The study confirms the dominant role of the 
                         thermospheric winds on north-south asymmetry in the ionospheric 
                         F-region. The ionospheric irregularities are found to be confined 
                         in the equatorial region, of the bottomside spread-F type, before 
                         and during the geomagnetic storm. It shows that the geomagnetic 
                         storm did not affect the generation or suppression of ionospheric 
                         irregularities at the stations investigated.",
                  doi = "10.1016/j.jastp.2017.02.009",
                  url = "http://dx.doi.org/10.1016/j.jastp.2017.02.009",
                 issn = "1364-6826",
             language = "en",
           targetfile = "abreu_ionospheric.pdf",
        urlaccessdate = "04 dez. 2020"