Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1777282 | Journal of Atmospheric and Solar-Terrestrial Physics | 2011 | 6 Pages |
During the Conjugate Point Experiment (COPEX) campaign performed at Boa Vista (2.80∘N;60.70∘W, dip angle 21.7∘N21.7∘N) from October to December 2002, 15 medium-scale gravity waves in the OHNIR airglow images were observed. Using a Keogram image analysis, we estimate their parameters. Most of the waves propagate to Northwest, indicating that their main sources are Southeast of Boa Vista. Quasi-simultaneous plasma bubble activities in the OI 630 nm images were observed in seven cases. The distances between the bubble depletions have a linear relationship with the wavelengths of the gravity waves observed in the mesosphere, which suggests a direct contribution of the mesospheric medium-scale gravity waves in seeding the equatorial plasma bubbles.
Research highlights► We observe 15 medium-scale gravity waves near to the equator and calculate their parameters using the Keogram methodology. ► The waves present an anisotropy that suggests the main sources is at southeast of Boa Vista. ► A linear relationship between the distances of the plasma bubble depletions and the horizontal wavelengths of the mesospheric gravity waves is presented. ► This relationship suggests a direct contribution of the gravity waves in the seeding mechanism of the ionospheric plasma bubbles.