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Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Oct 2019

Submitted as: research article | 02 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

First measurements of tides in the stratosphere and lower mesosphere by ground-based Doppler microwave wind radiometry

Jonas Hagen1, Klemens Hocke1, Gunter Stober1, Simon Pfreundschuh2, Axel Murk1, and Niklaus Kämpfer1 Jonas Hagen et al.
  • 1Institute of Applied Physics, University of Bern, Bern, Switzerland
  • 2Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden

Abstract. Atmospheric tides are important for the vertical coupling in the atmosphere from the stratosphere down to the troposphere and up to the ionosphere. They are gravity waves with well-known periods that are integer fractions of a day and can be observed in the temperature or wind field in the atmosphere. Current lidar and satellite techniques measure atmospheric tides only in the temperature field and continuous measurements of the tides in the wind field of the stratosphere and lower mesosphere are not available. In this study, we present measurements of the diurnal tide in the wind field in the stratosphere and lower mesosphere by ground based microwave wind radiometry for two different campaigns in tropical and polar regions. Further, we compare our measurements to MERRA-2 reanalysis data. In the three-monthly mean, we find a good overall correspondence between measurements and reanalysis with the most important features of the diurnal tides represented in both data sets. When looking at shorter timescales, we find an intermittency of the diurnal tide that is not represented in the MERRA-2 reanalysis data. We conclude, that continuous ground based observations of tides in the middle atmospheric wind field are feasible, even on short timescales of 7 to 13 days, and thus provide additional insight to middle atmospheric dynamics that is complementary to temperature observations and reanalysis data.

Jonas Hagen et al.
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Jonas Hagen et al.
Data sets

Wind fields from aggregated retrievals from the WIRA-C Doppler wind radiometer in tropical and arctic lattitudes J. Hagen

Jonas Hagen et al.
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