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Volume 51 Supplement 7-8

Special Issue: Dynamics and Structure of the Mesopause Region (DYSMER)

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Some results of S-transform analysis of the transient planetary-scale wind oscillations in the lower thermosphere

Earth, Planets and Space volume 51, pages 711–717 (1999)Cite this article

Abstract

Technique appropriate to the analysis of lower thermospheric wind data recorded by global-scale networks of ground-based instruments are discussed. The S-transform technique is shown to be effective in the analysis of the main features of travelling planetary waves and this method is applied to the time series of horizontal-velocity data obtained during the DYANA campaign (January–March, 1990). The analysis reveals strongly transient behavior of the day-to-day lower thermosphere wind variations, as well as their specific longitudinal structure. In particular, it was found that the revealed quasi-15 day and quasi-5 day wind oscillations may be described as transient westwardpropagating waves with zonal wavenumber s = 1, while an oscillation with the a period near 7 days is tentatively identified as having a wavenumber s = 0.

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Authors and Affiliations

  1. Institute for Experimental Meteorology, Obninsk, Russia

    Yu. I. Portnyagin & E. G. Merzlyakov

  2. Institute for Meteorology, University of Leipzig, Germany

    Ch. Jacobi

  3. Department of Physics, University of Wales, Aberystwyth, UK

    N. J. Mitchell

  4. RMCS Shrivenham, Cranfield University, Swindon, UK

    H. G. Muller

  5. Institute for Space and Atmospheric Studies University of Saskatchewan, Saskatoon, Canada

    A. H. Manson

  6. Institute of Atmospheric Physics, Kuehlungsborn, Germany

    W. Singer & P. Hoffmann

  7. Kazan State University, Kazan, Russia

    A. N. Fachrutdinova

Authors
  1. Yu. I. Portnyagin
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  2. E. G. Merzlyakov
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  3. Ch. Jacobi
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  4. N. J. Mitchell
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  5. H. G. Muller
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  6. A. H. Manson
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  7. W. Singer
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  8. P. Hoffmann
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  9. A. N. Fachrutdinova
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Correspondence to Yu. I. Portnyagin.

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Portnyagin, Y.I., Merzlyakov, E.G., Jacobi, C. et al. Some results of S-transform analysis of the transient planetary-scale wind oscillations in the lower thermosphere. Earth Planet Sp 51, 711–717 (1999). https://doi.org/10.1186/BF03353229

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  • DOI: https://doi.org/10.1186/BF03353229

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