Articles | Volume 23, issue 5
https://doi.org/10.5194/acp-23-3267-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-23-3267-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Mar 2023
Research article |
| 14 Mar 2023
| 14 Mar 2023
Very-long-period oscillations in the atmosphere (0–110 km) – Part 2: Latitude– longitude comparisons and trends
Dirk Offermann
CORRESPONDING AUTHOR
Institut für Atmosphären- und Umweltforschung, Bergische
Universität Wuppertal, Wuppertal, Germany
Christoph Kalicinsky
Institut für Atmosphären- und Umweltforschung, Bergische
Universität Wuppertal, Wuppertal, Germany
Ralf Koppmann
Institut für Atmosphären- und Umweltforschung, Bergische
Universität Wuppertal, Wuppertal, Germany
Johannes Wintel
Institut für Atmosphären- und Umweltforschung, Bergische
Universität Wuppertal, Wuppertal, Germany
Elementar Analysensysteme GmbH, Langenselbold, Germany
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Atmospheric oscillations with periods of up to several 100 years exist at altitudes up to 110 km. They are also seen in computer models (GCMs) of the atmospheric. They are often attributed to external influences from the sun, from the oceans, or from atmospheric constituents. This is difficult to verify as the atmosphere cannot be manipulated in an experiment. However, a GCM can be changed arbitrarily. Doing so, we find that long-period oscillations may be excited internally in the atmosphere.
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Short summary
Atmospheric oscillations with periods between 5 and more than 200 years are believed to be self-excited (internal) in the atmosphere, i.e. non-anthropogenic. They are found at all altitudes up to 110 km and at four very different geographical locations (75° N, 70° E; 75° N, 280° E; 50° N, 7° E; 50° S, 7° E). Therefore, they hint at a global-oscillation mode. Their amplitudes are on the order of present-day climate trends, and it is therefore difficult to disentangle them.
Atmospheric oscillations with periods between 5 and more than 200 years are believed to be...
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