Wave characteristics obtained from OH rotational temperatures and 557.7 nm airglow intensities

Details Wave characteristics obtained from OH rotational temperatures and 557.7 nm airglow intensities Wave characteristics obtained from OH rotational temperatures and 557.7 nm airglow intensities

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..943c&link_type=abstract

(IAGA, Symposium on Coupling, Energetics, Dynamics and Electrodynamics of Atmospheric Regions, Vancouver, Canada, Aug. 1987) Jou

Physics

9

Airglow, Gravity Waves, Hydroxyl Emission, Molecular Rotation, Oxygen Atoms, Earth Surface, Rocky Mountains (North America), Upper Atmosphere

Scientific paper

Variations of OH rotational temperature and 557.7-nm atomic O intensity were measured from Calgary, Canada, from 1985 to 1987. Observations from three nights are discussed in detail, showing a correlation between the OH rotational temperature wave structure at 85 km and the green line emission at 95 km. This suggests that wave activity linked the two regions. At 85 km, high and low frequency wave structure was observed, but at 95 km the high frequency component disappeared. From temperature data from 16 nights of wave activity, horizontal wavelengths from about 5 to 100 km are derived and vertical wavelengths from 0.7 to 8 km are inferred. It is suggested that the dominant source of gravity waves in the mesopause region near Calgary is a result of prevailing westerly winds blosing over the Rocky Mountains to the southeast. No waves were observed propagating towards the southeast, suggesting the presence of a filtering mechanism.

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