Annales Geophysicae (Apr 2009)

First observation of an undular mesospheric bore in a Doppler duct

  • J. Fechine,
  • C. M. Wrasse,
  • H. Takahashi,
  • A. F. Medeiros,
  • P. P. Batista,
  • B. R. Clemesha,
  • L. M. Lima,
  • D. Fritts,
  • B. Laughman,
  • M. J. Taylor,
  • P. D. Pautet,
  • M. G. Mlynczak,
  • J. M. Russell

DOI
https://doi.org/10.5194/angeo-27-1399-2009
Journal volume & issue
Vol. 27
pp. 1399 – 1406

Abstract

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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.