@InProceedings{BarbosaVirgAntuSchm:2017:PaSiEa,
               author = "Barbosa, Marcos Vinicius Grala and Virg{\'{\i}}nia, Alves Maria 
                         and Antunes, Vieira Luiz Eduardo and Schmitz, Roberta 
                         Gon{\c{c}}alves",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Particle-in-cell simulations of Earth-like magnetosphere during a 
                         magnetic field reversal",
            booktitle = "Proceedings...",
                 year = "2017",
         organization = "AGU Fall Meeting",
             abstract = "The geologic record shows that hundreds of pole reversals have 
                         occurred throughout Earth's history. The mean interval between the 
                         poles reversals is roughly 200 to 300 thousand years and the last 
                         reversal occurred around 780 thousand years ago. Pole reversal is 
                         a slow process, during which the strength of the magnetic field 
                         decreases, become more complex, with the appearance of more than 
                         two poles for some time and then the field strength increases, 
                         changing polarity. Along the process, the magnetic field 
                         configuration changes, leaving the Earth-like planet vulnerable to 
                         the harmful effects of the Sun. Understanding what happens with 
                         the magnetosphere during these pole reversals is an open topic of 
                         investigation. Only recently PIC codes are used to modeling 
                         magnetospheres. Here we use the particle code iPIC3D [Markidis et 
                         al, Mathematics and Computers in Simulation, 2010] to simulate an 
                         Earth-like magnetosphere at three different times along the pole 
                         reversal process. The code was modified, so the Earth-like 
                         magnetic field is generated using an expansion in spherical 
                         harmonics with the Gauss coefficients given by a MHD simulation of 
                         the Earths core [Glatzmaier et al, Nature, 1995; 1999; private 
                         communication to L.E.A.V.]. Simulations show the qualitative 
                         behavior of the magnetosphere, such as the current structures. 
                         Only the planet magnetic field was changed in the runs. The solar 
                         wind is the same for all runs. Preliminary results show the 
                         formation of the Chapman-Ferraro current in the front of the 
                         magnetosphere in all the cases. Run for the middle of the reversal 
                         process, the low intensity magnetic field and its asymmetrical 
                         configuration the current structure changes and the presence of 
                         multiple poles can be observed. In all simulations, a structure 
                         similar to the radiation belts was found. Simulations of more 
                         severe solar wind conditions are necessary to determine the real 
                         impact of the reversal in the magnetosphere.",
  conference-location = "New Orleans",
      conference-year = "11-15 Dec.",
             language = "en",
           targetfile = "barbosa_particle.pdf",
        urlaccessdate = "24 abr. 2024"
}