@Article{AbduSouBatFejSob:2013:SpLaDe,
               author = "Abdu, M. A. and Souza, J. R. and Batista, Inez Staciarini and 
                         Fejer, B. G. and Sobral, Jose Humberto Andrade",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and Center for Atmospheric and Space 
                         Sciences, Utah State University, Logan, Utah, USA and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Sporadic E layer development and disruption at low latitudes by 
                         prompt penetration electric fields during magnetic storms",
              journal = "Journal of Geophysical Research",
                 year = "2013",
               volume = "118",
               number = "5",
                pages = "2639--2647",
                month = "May",
             keywords = "equatorial ionosphere, sporadic E layer, penetration electric 
                         fields, magnetic storms, conductivity ratio, particle 
                         precipitation.",
             abstract = "An investigation of low-latitude sporadic E layers during magnetic 
                         storms shows that the formation and disruption of these layers are 
                         strongly controlled by the magnetospheric electric fields that 
                         penetrate to equatorial ionosphere. It is observed that a prompt 
                         penetration electric field (PPEF) of westward polarity that 
                         dominates the nightside ionosphere can cause formation of sporadic 
                         E layers near 100\ km, while a PPEF of eastward polarity 
                         that dominates the dayside and eveningside can lead to disruption 
                         of an Es layer in progress. It is shown that a vertical Hall 
                         electric field, induced by the primary zonal PPEF, in the presence 
                         of the storm-associated enhanced conductivity of the night E 
                         layer, can be responsible for vertical ion velocity convergence 
                         sufficient to influence the Es layer formation. A downward 
                         polarity of the Hall electric field leads to Es layer formation, 
                         while an upward polarity causes the Es layer disruption. An 
                         interplay of magnetic storm associated prompt penetration electric 
                         field and energetic particle precipitation is evident in the 
                         observed Es layer response features in the region of the South 
                         Atlantic/American magnetic anomaly reported here.",
                  doi = "10.1002/jgra.50271",
                  url = "http://dx.doi.org/10.1002/jgra.50271",
                 issn = "0148-0227 and 2156-2202",
                label = "self-archiving-INPE-MCTI-GOV-BR",
             language = "en",
        urlaccessdate = "03 maio 2024"
}