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%0 Conference Proceedings
%4 sid.inpe.br/mtc-m21c/2021/03.25.13.55
%2 sid.inpe.br/mtc-m21c/2021/03.25.13.55.33
%T Observation of mesospheric fronts over Cachoeira Paulista
%D 2021
%A Ogobor,
%A Paulino, I.,
%A Andrioli, Vânia de Fátima,
%A Wrasse, Cristiano Max,
%A Medeiros, Amauri Fragoso de,
%@affiliation National Space Research & Development Agency
%@affiliation Universidade Federal de Campina Grande (UFCG)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation National Space Research & Development Agency
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress vaniafatima@gmail.com
%@electronicmailaddress cristiano.wrasse@inpe.br
%B Simpósio Brasileiro de Geofísica Espacial e Aeronomia, 8 (SBGEA)
%C Online
%8 22-26 mar.
%X Six mesospheric fronts were studied between 2007 and 2008 using simultaneous data from an all-sky imager (images), meteor radar (wind) and Na Lidar (temperature). The wave events were observed in the following nights: 14-15 September 2007; 5 October 2007; 5 March 2008; 31 March 2008; 3 September 2008; 10 October 2007, over Cachoeira Paulista (23oS, 45oW). Images of OH, O2 (0,1) and OI 557.7 nm airglow emissions were used to identify the waves. The horizontal wind and temperature data were used to correctly describe the atmospheric background conditions in the mesosphere and lower thermosphere regions. The waves were classified as mesospheric bore front (four events), and mesospheric wall front (one event). This is the first simultaneous observation of a mesospheric front in Brazil using the allsky imager, meteor radar, and Na lidar instrument. The analysis using the square of vertical wave-number profile revealed the duct regions and their primary cause (Doppler or Thermal). The bore fronts observed were undular and non-undular with dark fronts in some airglow emission layers and bright fronts in others. Most of the observed wave fronts were in agreement with the complementary effect predicted in the literature.
%@language en


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