the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Interaction of Small-Scale Gravity Waves with the Terdiurnal Solar Tide in the Mesosphere and Lower Thermosphere
Abstract. Implementing a nonlinear whole atmosphere gravity wave (GW) parameterization into the Middle and Upper Atmosphere Model extending to the lower thermosphere (160 km), we study the response of the atmosphere in terms of the circulation patterns, temperature distribution, and migrating terdiurnal solar tide activity to the upward propagating small-scale internal GWs originating in the lower atmosphere. We perform three test simulations for the Northern Hemisphere winter conditions in order to assess the effects of variations in the initial GW spectrum on the dynamics of the mesosphere and lower thermosphere. We find that the overall strength of the source level momentum flux has a comparatively small impact on zonal mean dynamics. The tails of the GW source level spectrum, however, are crucial for the lower thermosphere dynamics. With respect to the terdiurnal tide, we find a strong dependence of tidal amplitude on the induced GW drag, generally being larger when GW drag is increased.
This preprint has been withdrawn.
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Withdrawal notice
This preprint has been withdrawn.
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Preprint
(2168 KB)
Interactive discussion
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RC1: 'RC Review #1', Nikolai M. Gavrilov, 29 Feb 2020
- AC2: 'Answer to RC Review #1', Friederike Lilienthal, 05 Apr 2020
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RC2: 'Review of Lilienthal et al.: Interaction of small-scale gravity waves... (GMD-2019-339)', Anonymous Referee #2, 04 Mar 2020
- AC3: 'Answer to RC Review #2', Friederike Lilienthal, 05 Apr 2020
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RC3: 'Review of gmd-2019-339', Anonymous Referee #3, 10 Mar 2020
- AC4: 'Answer to RC Review #3', Friederike Lilienthal, 05 Apr 2020
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SC1: 'executive editor comment on gmd-2020-339', Astrid Kerkweg, 10 Mar 2020
- AC1: 'Response to executive editor comment', Friederike Lilienthal, 04 Apr 2020
Interactive discussion
-
RC1: 'RC Review #1', Nikolai M. Gavrilov, 29 Feb 2020
- AC2: 'Answer to RC Review #1', Friederike Lilienthal, 05 Apr 2020
-
RC2: 'Review of Lilienthal et al.: Interaction of small-scale gravity waves... (GMD-2019-339)', Anonymous Referee #2, 04 Mar 2020
- AC3: 'Answer to RC Review #2', Friederike Lilienthal, 05 Apr 2020
-
RC3: 'Review of gmd-2019-339', Anonymous Referee #3, 10 Mar 2020
- AC4: 'Answer to RC Review #3', Friederike Lilienthal, 05 Apr 2020
-
SC1: 'executive editor comment on gmd-2020-339', Astrid Kerkweg, 10 Mar 2020
- AC1: 'Response to executive editor comment', Friederike Lilienthal, 04 Apr 2020
Model code and software
The Middle and Upper Atmosphere Model (MUAM) Version 2019 F. Lilienthal, E. Yiğit, N. Samtleben, and C. Jacobi https://doi.org/10.5281/zenodo.3628282
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