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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 6
Ann. Geophys., 27, 2361-2369, 2009
https://doi.org/10.5194/angeo-27-2361-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

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

Ann. Geophys., 27, 2361-2369, 2009
https://doi.org/10.5194/angeo-27-2361-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  08 Jun 2009

08 Jun 2009

Gravity wave amplitudes and momentum fluxes inferred from OH airglow intensities and meteor radar winds during SpreadFEx

F. Vargas1, D. Gobbi1, H. Takahashi1, and L. M. Lima2 F. Vargas et al.
  • 1Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil
  • 2Universidade Estadual da Paraíba (UEPB), Campina Grande, PB, Brazil

Abstract. We show in this report the momentum flux content input in the mesosphere due to relatively fast and small scale gravity waves (GWs) observed through OH airglow images. The acquisition of OH NIR images was carried out in Brazil at Brasilia (14.8° S, 47.6° W) and Cariri (7.4° S, 36.5° W) from September 2005 to November 2005 during the SpreadFEx Campaign. Horizontal wind information from meteor radar was available in Cariri only. Our findings showed strong wave activity in both sites, mainly in Cariri. High wave directionality was also observed in both sites during SpreadFEx, which have been observed by other investigators using different analysis' techniques and different types of data during the campaign. We discuss also the possibility of plasma bubble seeding by gravity waves presenting spatial and temporal scales estimated with our novel analysis technique during the SpreadFEx campaign.

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