@Article{TakahashiEFWBAOSL:2021:MuStLo,
               author = "Takahashi, Hisao and Essien, Patrick and Figueiredo, Cosme 
                         Alexandre Oliveira Barros and Wrasse, Cristiano Max and Barros, 
                         Diego and Abdu, Mangalathayil Ali and Otsuka, Y. and Shiokawa, K. 
                         and Li, Gouzhu",
          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 
                         {Nagoya University} and {Nagoya University} and {Chinese Academy 
                         of Sciences}",
                title = "Multi-instrument study of longitudinal wave structures for plasma 
                         bubble seeding in the equatorial ionosphere",
              journal = "Earth and Planetary Physics",
                 year = "2021",
               volume = "5",
               number = "5",
                pages = "368--377",
                month = "Sept.",
             keywords = "Multi-instrument study of longitudinal wave structures for plasma 
                         bubble seeding in the equatorial ionosphere.",
             abstract = "Large Scale Wave Structures (LSWS) in the equatorial ionospheric 
                         F-region were observed by measuring spatial and temporal 
                         variations within detrended total electron content (dTEC) data 
                         obtained by ground-based GNSS receivers over the South American 
                         continent. By using dTEC-maps, we have been able to produce, for 
                         the first-time, two-dimensional representations of LSWS. During 
                         the period from September to December, the LSWS frequently 
                         occurred starting a few hours prior to Equatorial Plasma Bubble 
                         (EPB) development. From 17 events of LSWS observed in 2014 and 
                         2015, wave characteristics were obtained: the observed 
                         wavelengths, periods, and the phase speeds are respectively, 
                         similar to 900 km, similar to 41 min and similar to 399 m/s; the 
                         waves propagated from the northeast to southeast. In some cases 
                         the front of the oscillation was meridionally aligned, extending 
                         to more than 1600 km, the first time such large extension of the 
                         wavefront has been reported. From F-layer bottom height 
                         oscillation data, measured by ionosonde, LSWS exhibit two 
                         different vertical phase propagation modes, in-phase and downward 
                         phase. The former mode indicates the presence of a polarization 
                         electric field in the F-layer bottom side; the latter suggests 
                         propagation of atmospheric gravity waves. The presence of LSWS 
                         near the solar terminator, followed by the development of EPBs, 
                         suggests that the upwelling of the F-layer bottom height produces 
                         a condition favorable to the development of Rayleigh-Taylor 
                         instability.",
                  doi = "10.26464/epp2021047",
                  url = "http://dx.doi.org/10.26464/epp2021047",
                 issn = "2096-3955",
             language = "en",
           targetfile = "takashi_multi.pdf",
        urlaccessdate = "16 jun. 2024"
}