@Article{PaulaSouFejBaiHee:2002:LoIoEf,
               author = "Paula, Eurico Rodrigues de and Souza, Jonas Rodrigues de and 
                         Fejer, Bela Gyula and Bailey, G. J. and Heelis, R. A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Utah State 
                         University} and {University of Sheffield} and {University of Texas 
                         at Dallas}",
                title = "Longitudinal ionospheric effects in the South Atlantic evening 
                         sector during solar maximum",
              journal = "Journal of Geophysical Research",
                 year = "2002",
               volume = "107",
               number = "A7",
                pages = "art. no. 1102",
                month = "July",
             keywords = "equatorial ionosphere, vertical plasma drifts, meridional wind, 
                         ionic density, ionospheric, modeling.",
             abstract = "Large-scale horizontal gradients in ion density and vertical drift 
                         observed by the Atmospheric Explorer E satellite in the South 
                         Atlantic region (latitudes 10degreesS-20degreesS, longitudes 
                         50degreesW-10degreesE) during the June solstice at solar maximum 
                         are presented and analyzed. These features occur during the 
                         nighttime period. The observations near 450-km altitude show 
                         vertically downward ion drift velocities exceeding 120 m s(-1) and 
                         depleted regions where the ion density is around 2 x 10(4) cm(-3). 
                         It is shown, using values modeled by the Sheffield University 
                         Plasmasphere Ionosphere Model (SUPIM) along the satellite 
                         trajectory, that the large ion density depletions appear as a 
                         result of large downward ion drifts driven by large southward 
                         winds along the magnetic meridian and by diffusion. During others 
                         seasons such behavior is not observed by the AE-E satellite, 
                         neither by SUPIM results. The roles played by the different 
                         physical processes responsible for the large downward drift 
                         velocities are investigated. The model results highlight the 
                         relationship between longitudinal variation of the ion densities 
                         and the location of the equatorial anomaly crest in the South 
                         Atlantic region.",
           copyholder = "SID/SCD",
                  doi = "10.1029/2001JA000298",
                  url = "http://dx.doi.org/10.1029/2001JA000298",
                 issn = "0148-0227 and 2156-2202",
             language = "en",
           targetfile = "jgra16225.pdf",
        urlaccessdate = "20 maio 2024"
}