@InProceedings{MachadoKhPiScYaWaZh:2018:EfSoAm,
               author = "Machado, Cristiano Sarzi and Kherani, Esfhan Alam and Pimenta, 
                         Alexandre Alvares and Schuch, Nelson Jorge and Yang, G. and Wang, 
                         C. and Zhengkuan, L.",
          affiliation = "{China-Brazil Joint Laboratory for Space Weather 
                         (CBJLSW/NSSC/CAS)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {State Key 
                         Laboratory of Space Weather (NSSC/CAS)} and {State Key Laboratory 
                         of Space Weather (NSSC/CAS)} and {China-Brazil Joint Laboratory 
                         for Space Weather (CBJLSW/NSSC/CAS)}",
                title = "Effects of the South America magnetic anomaly on the generation of 
                         acoustic gravity waves and MSTIDS in the southern hemisphere",
                 year = "2018",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 7. (SBGEA)",
             abstract = "Using OI 630.0 nm all-sky images, obtained by ground-based imaging 
                         systems installed at Cachoeira Paulista (22.7° S, 45.0° W, DIP 
                         angle -37.6°) and Sao Martinho da Serra (29.4° S, 53.8° W, DIP 
                         angle = -37.3°), a set of Medium Scale Traveling Ionospheric 
                         Disturbances (MSTIDs) were detected. The propagation direction was 
                         Northwestward, indicating that they are related to Perkins 
                         instability at mid-latitudes. The events occurred in 
                         geomagnetically quiet periods (Kp<3) and were associated with 
                         spread F in the ionograms of three different digisondes: Cachoeira 
                         Paulista, Port Stanley (51.6° S, 57.9° W, DIP angle = - 49.8°) and 
                         Ascension Island (07,95° S, 14.4° W, DIP angle = -43.4°). 
                         Numerical simulations were conducted to evaluate the role of the 
                         South America Magnetic Anomaly (SAMA) in the generation of 
                         acoustic-gravity waves (AGWs) and MSTIDs in the Southern 
                         Hemisphere. The results show that the Joule effect caused by the 
                         enhancement of the E region current, due to the particles 
                         precipitation in the SAMA should generate AGWs, which can act as a 
                         trigger of Perkins instability at mid-latitudes. This paper 
                         present and discusses the features of AGWs generated by SAMA, its 
                         propagation properties and interaction with electromagnetic 
                         process that can generate MSTIDs in the Southern Hemisphere.",
  conference-location = "Santa Maria, RS",
      conference-year = "05-09 nov",
             language = "pt",
        urlaccessdate = "28 abr. 2024"
}