Weather and Climate Dynamics
Weather and Climate Dynamics
Weather and Climate Dynamics
Articles | Volume 1, issue 2
Weather Clim. Dynam., 1, 481–495, 2020
Weather Clim. Dynam., 1, 481–495, 2020

Research article 29 Sep 2020

Research article | 29 Sep 2020

On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics

Ales Kuchar et al.

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Cited articles

Abalos, M., Legras, B., Ploeger, F., and Randel, W. J.: Evaluating the advective Brewer-Dobson circulation in three reanalyses for the period 1979–2012, J. Geophys. Res.-Atmos., 120, 7534–7554,, 2015. a
Albers, J. R. and Birner, T.: Vortex Preconditioning due to Planetary and Gravity Waves prior to Sudden Stratospheric Warmings, J. Atmos. Sci., 71, 4028–4054,, 2014. a, b, c
Alexander, M. J.: Gravity Waves in the Stratosphere, American Geophysical Union (AGU), Geophysical Monograph Series, 109–121, available at: (last access: 25 September 2020), 2013.  a
Alexander, S. P., Sato, K., Watanabe, S., Kawatani, Y., and Murphy, D. J.: Southern Hemisphere Extratropical Gravity Wave Sources and Intermittency Revealed by a Middle-Atmosphere General Circulation Model, J. Atmos. Sci., 73, 1335–1349,, 2016. a, b
Andrews, D. G. and McIntyre, M. E.: JR Holton, and CB Leovy, 1987: Middle Atmosphere Dynamics, Academic Press, London, 1987. a
Short summary
Our study focuses on the impact of topographic structures such as the Himalayas and Rocky Mountains, so-called orographic gravity-wave hotspots. These hotspots play an important role in the dynamics of the middle atmosphere, in particular in the lower stratosphere. We study intermittency and zonally asymmetric character of these hotspots and their effects on the upper stratosphere and mesosphere using a new detection method in various modeling and observational datasets.