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@Article{AlvesSJSMBAKMMDBRDMVBSGBWA:2017:RoSoWi,
               author = "Alves, Livia Ribeiro and Souza, V. M. and Jauer, Paulo Ricardo and 
                         Silva, Ligia Alves da and Medeiros, Cl{\'a}udia and Braga, Carlos 
                         Roberto and Alves, Maria Virginia and Koga, Daiki and Marchezi, 
                         Jos{\'e} Paulo and Mendon{\c{c}}a, Rafael Rodrigues Souza de and 
                         Dallaqua, Renato Sergio and Barbosa, Marcos Vinicius Grala and 
                         Rockenbach, Marlos and Dal Lago, Alisson and Mendes J{\'u}nior, 
                         Odim and Vieira, Luis Eduardo Antunes and Banik, Marcelo and 
                         Sibeck, D. G. and G., Kanekal. S. and Baker, D. N. and Wygant, J. 
                         R. and A., Kletzing. C.",
          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)} and {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)} and {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)} and 
                         {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)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {NASA/Goddard Space Flight Center} and {NASA/Goddard 
                         Space Flight Center} and {University of Colorado Boulde} and 
                         {University of Minnesota} and {University of Iowa}",
                title = "The role of solar wind structures in the generation of ULF waves 
                         in the inner magnetosphere",
              journal = "Solar Physics",
                 year = "2017",
               volume = "292",
               number = "7",
                month = "July",
             keywords = "Solar wind transients, Solar wind geoeffectiveness, ULF waves, 
                         Earth's outer radiation belts, MHD simulation.",
             abstract = "The plasma of the solar wind incident upon the Earth's 
                         magnetosphere can produce several types of geoeffective events. 
                         Among them, an important phenomenon consists of the interrelation 
                         of the magnetospheric-ionospheric current systems and the 
                         charged-particle population of the Earth's Van Allen radiation 
                         belts. Ultra-low-frequency (ULF) waves resonantly interacting with 
                         such particles have been claimed to play a major role in the 
                         energetic particle flux changes, particularly at the outer 
                         radiation belt, which is mainly composed of electrons at 
                         relativistic energies. In this article, we use global 
                         magnetohydrodynamic simulations along with in situ and 
                         ground-based observations to evaluate the ability of two different 
                         solar wind transient (SWT) events to generate ULF (few to tens of 
                         mHz) waves in the equatorial region of the inner magnetosphere. 
                         Magnetic field and plasma data from the Advanced Composition 
                         Explorer (ACE) satellite were used to characterize these two SWT 
                         events as being a sector boundary crossing (SBC) on 24 September 
                         2013, and an interplanetary coronal mass ejection (ICME) in 
                         conjunction with a shock on 2 October 2013. Associated with these 
                         events, the twin Van Allen Probes measured a depletion of the 
                         outer belt relativistic electron flux concurrent with magnetic and 
                         electric field power spectra consistent with ULF waves. Two 
                         ground-based observatories apart in 90 degrees. longitude also 
                         showed evidence of ULF-wave activity for the two SWT events. 
                         Magnetohydrodynamic (MHD) simulation results show that the 
                         ULF-like oscillations in the modeled electric and magnetic fields 
                         observed during both events are a result from the SWT coupling to 
                         the magnetosphere. The analysis of the MHD simulation results 
                         together with the observations leads to the conclusion that the 
                         two SWT structures analyzed in this article can be geoeffective on 
                         different levels, with each one leading to distinct ring current 
                         intensities, but both SWTs are related to the same disturbance in 
                         the outer radiation belt, i.e. a dropout in the relativistic 
                         electron fluxes. Therefore, minor disturbances in the solar wind 
                         parameters, such as those related to an SBC, may initiate physical 
                         processes that are able to be geoeffective for the outer radiation 
                         belt.",
                  doi = "10.1007/s11207-017-1113-4",
                  url = "http://dx.doi.org/10.1007/s11207-017-1113-4",
                 issn = "0038-0938 and 1573-093X",
             language = "en",
           targetfile = "alves_role.pdf",
        urlaccessdate = "05 dez. 2020"
}


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