Fechar
Metadados

@InProceedings{JauerAPPVASS:2017:StMaFi,
               author = "Jauer, Paulo Ricardo and Alves, Livia Ribeiro and Padilha, 
                         Ant{\^o}nio Lopes and P{\'a}dua, Marcelo Banik de and Vitorello, 
                         {\'{\I}}caro and Alves, Maria Virginia and Silva, Ligia Alves da 
                         and Souza, Vitor Moura Cardoso e Silva",
          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)}",
                title = "Study of magnetic field spatial variations in the southern 
                         hemisphere's low latitudes due to different interplanetary 
                         structures using the 3-D MHD SWMF/BATSRUS model",
            booktitle = "Proceedings...",
                 year = "2017",
         organization = "AGU Fall Meeting",
             abstract = "Interplanetary structures such as Coronal Mass Ejections (CME), 
                         Shocks, Corotating Interaction Regions (CIR) and Magnetic Clouds 
                         (MC) interfere directly on Space Weather conditions and can cause 
                         severe and intense disturbances in the Earth's magnetic field as 
                         measured in space and on the ground. During magnetically disturbed 
                         periods characterized by world-wide, abrupt variations of the 
                         geomagnetic field, large and intense current systems can be 
                         induced and amplified within the Earth even at low latitudes. Such 
                         current systems are known as geomagnetically induced currents 
                         (GIC) and can cause damage to power transmission lines, 
                         transformers and the degradation of pipelines. As part of an 
                         effort to estimate GIC intensities throughout the low to 
                         equatorial latitudes of the Brazilian territory, we used the 3-D 
                         MHD SWMF/BATSRUS code to estimate spatial variations of the 
                         geomagnetic field during periods when the magnetosphere is under 
                         the influence of CME and MC structures. Specifically, we used the 
                         CalcDeltaB tool (Rastatter et al., Space Weather, 2014) to provide 
                         a proxy for the spatial variations of the geomagnetic field, with 
                         a 1 minute cadence, at 31 virtual magnetometer stations located in 
                         the proposed study region. The stations are spatially arranged in 
                         a two-dimensional network with each station being 5 degrees apart 
                         in latitude and longitude. In a preliminary analysis, we found 
                         that prior to the arrival of each interplanetary structure, there 
                         is no appreciable variation in the components of the geomagnetic 
                         field between the virtual stations. However, when the 
                         interplanetary structures reach the magnetosphere, each station 
                         perceives the magnetic field variation differently, so that it is 
                         not possible to use a single station to represent the magnetic 
                         field perturbation throughout the Brazilian region. We discuss the 
                         minimum number and spacing between stations to adequately detail 
                         the geomagnetic field variations in this region.",
  conference-location = "New Orleans",
      conference-year = "11-15 Dec.",
             language = "en",
        urlaccessdate = "27 nov. 2020"
}


Fechar