© Author(s) 2009. This work is distributed
under the Creative Commons Attribution 3.0 License.
First observation of an undular mesospheric bore in a Doppler duct
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.