Fechar
Metadados

@InProceedings{GomesRempRamoChia:2018:RoCuSh,
               author = "Gomes, Tiago Francisco Pinheiro and Rempel, Erico Luiz and Ramos, 
                         Fernando Manuel and Chian, Abraham Chian Long",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {University of 
                         Adelaide}",
                title = "The Role of Current Sheets on Statistical Modeling of Extreme 
                         Values and Evidence of Presence of Dragon King (DK) in Solar 
                         Wind",
                 year = "2018",
         organization = "Latin American Conference on Space Geophysics, 11. (COLAGE)",
             abstract = "The solar wind constitutes a nonlinear dynamical system, 
                         presenting intermittent turbulence, multifractality and chaotic 
                         dynamics. One characteristic shared by many such complex systems 
                         is the presence of extreme events, that play an important role in 
                         several Geophysical phenomena and their statistical 
                         characterization is a problem of great practical relevance. This 
                         work investigates the presence of extreme events in time series of 
                         the modulus of the interplanetary magnetic eld measured by Cluster 
                         spacecraft. One of the main results is that the solar wind can be 
                         modeled by the Generalized Pareto (GP) and Generalized Extreme 
                         Values (GEV) distributions. Both models present a statistically 
                         signicant positive shape parameter, implying a heavy tail in the 
                         probability distribution functions and an unbounded growth in 
                         return values as return periods become very long. There is 
                         evidence that current sheets are the main responsible for positive 
                         values of the shape parameter. It is also shown that magnetic 
                         reconnection at the interface between two interplanetary magnetic 
                         ux ropes in the solar wind can be considered as Dragon Kings (DK), 
                         which are a class of extreme events whose formation mechanisms are 
                         fundamentaly dierent from others, thus opening the possibility of 
                         their identication, prediction and even suppression. Dragon kings 
                         had previously been identied in time series of nancial crashes, 
                         nuclear power generation accidents, stock market and so on, and it 
                         is believed that they are associated with the occurrence of 
                         extreme events in dynamical systems at phase transition, 
                         bifurcation, crises or tipping points.",
  conference-location = "Buenos Aires, Argentina",
      conference-year = "16-20 abr.",
             language = "en",
           targetfile = ".htaccess",
        urlaccessdate = "23 nov. 2020"
}


Fechar