@Article{GonzálezMendMéndDomi:2013:SpEnAn,
               author = "Gonz{\'a}lez, Arian Ojeda and Mendes Junior, Odim and 
                         M{\'e}ndez, Alexander Calzadilla and Domingues, Margarete 
                         Oliveira",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and Inst Geophys \& 
                         Astron, Dept Space Geophys, Havana, Cuba. and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)}",
                title = "Spatio-temporal entropy analysis of the magnetic field to help 
                         magnetic cloud characterization",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2013",
               volume = "118",
               number = "9",
                pages = "5403--5414",
                month = "Sep.",
             keywords = "ICME, magnetic clouds, entropy, space plasmas, IMF, space 
                         electrodynamics.",
             abstract = "The aim of this work is to create a methodology to characterize 
                         the dynamics of magnetic clouds (MCs) from signals measured by 
                         satellites in the interplanetary medium. We have tested 
                         spatio-temporal entropy (STE) technique to study 41 MCs identified 
                         by other authors, where the plasma sheath region has been 
                         identified. The STE was implemented in Visual Recurrence Analysis 
                         software to quantify the order in the recurrence plot. Some tests 
                         using synthetic time series were performed to validate the method. 
                         In particular, we worked with interplanetary magnetic field (IMF) 
                         components B-x, B-y, B-z of 16 s. Time windows from March 1998 to 
                         December 2003 for some MCs were selected. We found higher STE 
                         values in the sheaths and 0 STE values in some of the three 
                         components in most of the MCs (30 among 41 events). The trend is 
                         the principal cause of the lower STE values in the MCs. Also, MCs 
                         have magnetic field more structured than sheath and quiet solar 
                         wind. We have done a test considering the magnetic components of a 
                         cylindrically symmetric force-free field constructed analytically, 
                         with the result of 0 STE value. It agrees with the physical 
                         assumption of finding 0 STE values when studying experimental data 
                         in MC periods. The new feature just examined here adds to the 
                         usual features, as described in Burlaga et al. (1981), for the 
                         characterization of MCs. The STE calculation can be an auxiliary 
                         objective tool to identify flux ropes associated with MCs, mainly 
                         during events with no available plasma data but only with IMF.",
                  doi = "10.1002/jgra.50504",
                  url = "http://dx.doi.org/10.1002/jgra.50504",
                 issn = "2169-9402",
                label = "isi 2013-11",
             language = "en",
           targetfile = "ResponsetoReviewer.pdf",
        urlaccessdate = "28 abr. 2024"
}