Articles | Volume 9, issue 12
Research article
12 Dec 2016
Research article |  | 12 Dec 2016

High-resolution observations of small-scale gravity waves and turbulence features in the OH airglow layer

René Sedlak, Patrick Hannawald, Carsten Schmidt, Sabine Wüst, and Michael Bittner

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Analysis of 2D airglow imager data with respect to dynamics using machine learning
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Atmos. Meas. Tech. Discuss.,,, 2023
Revised manuscript accepted for AMT
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Gravity wave instability structures and turbulence from more than 1.5 years of OH* airglow imager observations in Slovenia
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Intra-annual variations of spectrally resolved gravity wave activity in the upper mesosphere/lower thermosphere (UMLT) region
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Seasonal and intra-diurnal variability of small-scale gravity waves in OH airglow at two Alpine stations
Patrick Hannawald, Carsten Schmidt, René Sedlak, Sabine Wüst, and Michael Bittner
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Cited articles

Adams, G. W., Peterson, A. W., Brosnahan, J. W., and Neuschaefer, J. W.: Radar and optical observations of mesospheric wave activity during the lunar eclipse of 6 July 1982, J. Atmos. Terr. Phys., 50, 11–20, 1988.
Andreassen, Ø., Wasberg, C. E., Fritts, D. C., and Isler, J. R.: Gravity wave breaking in two and three dimensions 1. Model description and comparison of two-dimensional evolutions, J. Geophys. Res., 99, 8095–8108, 1994.
Baker, D. J. and Stair, A. T.: Rocket Measurements of the Altitude Distributions of the Hydroxyl Airglow, Phys. Scripta, 37, 611–622, 1988.
Bates, D. R. and Nicolet, M.: Atmospheric Hydrogen, Publ. Astron. Soc. Pac., 62, 106–110, 1950.
Short summary
In this paper a SWIR airglow imager is presented. It is especially designed for the observation of small-scale gravity waves and turbulence features in the OH airglow layer with a high spatio-temporal resolution of up to 17 m (at mesopause heights) and 2.5 to 2.8 s. Two case studies show small-scale wave structures with horizontal wavelengths of approximately 550 m as well as vortex formation and decomposition of wave fronts, both indicating the onset of turbulence.