Articles | Volume 27, issue 4
Ann. Geophys., 27, 1399–1406, 2009

Special issue: The Spread F Experiment (SpreadFEx): Coupling from the lower...

Ann. Geophys., 27, 1399–1406, 2009

  01 Apr 2009

01 Apr 2009

First observation of an undular mesospheric bore in a Doppler duct

J. Fechine1, C. M. Wrasse2, H. Takahashi3, A. F. Medeiros1, P. P. Batista3, B. R. Clemesha3, L. M. Lima4, D. Fritts5, B. Laughman5, M. J. Taylor6, P. D. Pautet3, M. G. Mlynczak7, and J. M. Russell8 J. Fechine et al.
  • 1Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
  • 2Universidade do Vale do Paraíba, UNIVAP/IP&D, São José dos Campos, SP, Brazil
  • 3Instituto Nacional de Pesquisas Espaciais, São José dos Campos, Brazil
  • 4Universidade Estadual da Paraíba, Campina Grande, PB, Brazil
  • 5NorthWest Research Associates, Colorado Research Associates Division, Boulder, CO, USA
  • 6Utah State University, Logan, UT, USA
  • 7Atmospheric Sciences Division, NASA Langley Research Center, Hampton, VA, USA
  • 8Center for Atmospheric Sciences, Hampton University, Hampton, VA, USA

Abstract. On 1 October 2005, during the SpreadFEx campaign, a distinct mesospheric bore was observed over São João do Cariri (7.4° S, 36.5° W), Brazil by using airglow all-sky imagers. The event appeared both in the OI5577 and OH emissions, forming a well extended wave front which was followed by short waves from behind. Simultaneous wind and temperature data obtained by the meteor radar and the TIMED/SABER satellite instrument revealed that the bore event occurred during the Doppler ducting condition in the emission layers.