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Benedikt Ehard, Peggy Achtert, Andreas Dörnbrack, Sonja Gisinger, Jörg Gumbel, Mikhail Khaplanov, Markus Rapp, and Johannes Wagner

wave field. Thus, it was possible to study the vertical propagation of gravity waves from the troposphere into the middle atmosphere, which is generally not possible with Rayleigh lidar observations alone. Furthermore, the Rayleigh lidar observations revealed a stratopause layer descending over several kilometers during both cases, indicating an interaction of the vertically propagating gravity waves with the stratopause. A more detailed analysis of the wave propagation and the interaction with the

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Qingfang Jiang, James D. Doyle, Stephen D. Eckermann, and Bifford P. Williams

the transfer of energy in stationary mountain waves . Geofys. Publ. , 22 (3), 1 – 23 . Fels , S. , and R. S. Lindzen , 1974 : Interaction of thermally excited gravity waves with mean flows . Geophys. Fluid Dyn. , 5 , 149 – 191 , https://doi.org/10.1080/03091927409365793 . 10.1080/03091927409365793 Fritts , D. C. , and M. J. Alexander , 2003 : Gravity wave dynamics and effects in the middle atmosphere . Rev. Geophys. , 41 , 1003 , https://doi.org/10.1029/2001RG000106 . 10

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Stephen D. Eckermann, Dave Broutman, Jun Ma, James D. Doyle, Pierre-Dominique Pautet, Michael J. Taylor, Katrina Bossert, Bifford P. Williams, David C. Fritts, and Ronald B. Smith

). Fritts et al. (2016) review the planning, execution, and initial results of DEEPWAVE. One of the many scientific objectives of DEEPWAVE was to acquire gravity wave observations to test recent ideas that gravity waves generated by small island terrain in the Southern Ocean significantly influence the large-scale momentum budget of the middle atmosphere in austral winter. This idea first arose when Alexander et al. (2009) analyzed radiances acquired by the Atmospheric Infrared Sounder (AIRS) on the

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