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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/angeo-2019-117
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-117
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: regular paper 22 Aug 2019

Submitted as: regular paper | 22 Aug 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Local Stratopause Temperature Variabilities and their Embedding in the Global Context

Ronald Eixmann1, Vivien Matthias2, Gerd Baumgarten1, Michael Gerding1, and Josef Höffner1 Ronald Eixmann et al.
  • 1Leibniz Institute of Atmospheric Research, Schloss-Strasse 6, 18225 Kühlungsborn, Germany
  • 2Potsdam Institute for Climate Impact Research, Telegrafenberg A 31, 14473 Potsdam, Germany

Abstract. The stratopause is by definition the transition between the underlying stratosphere and the overlying mesosphere. While the circulation of the winter stratosphere is mainly driven by planetary waves, it is driven by gravity waves in the mesosphere. The aim of this study is to bring local stratopause variabilities in a global context and thus studying quantitatively the impact of quasi stationary planetary waves (PWs) on local measurements around the stratopause in winter. Therefore we combine local lidar measurements with global MERRA-2 reanalysis data and analyze the effect of global PWs on different locations with the help of the new and simple concept of local displacement. This concepts includes the amplitude and changes in phase of PWs. Our results show that about 97 % of the local day-to-day variability of the stratopause can be explained by the variability of PWs with wavenumbers 1, 2 and 3. Thus locally measured effects which are not based on PW variability can be much better identified and thus investigated. This will help to improve our understanding of local phenomena.

Ronald Eixmann et al.
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Short summary
The aim of this study is to bring local variabilities in a global context. To qualitatively study the impact of global waves on local measurements in winter, we combine local lidar measurements with global MERRA-2 reanalysis data. Our results show that about 97 % of the local day-to-day variability can be explained by the variability of waves with zonal wavenumbers 1, 2 and 3. Thus locally measured effects which are not based on global wave variability can be much better investigated.
The aim of this study is to bring local variabilities in a global context. To qualitatively...
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