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

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概要

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• 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.

• 公益社団法人 日本地震学会、地球電磁気・地球惑星圏学会 、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会の論文

著者

• Manson A.

  Institute For Space And Atmospheric Studies University Of Saskatchewan

• Merzlyakov E.

  Institute for Experimental Meteorology

• Portnyagin Yu.

  Institute for Experimental Meteorology

• Muller H.

  Cranfield University Rmcs Shrivenham

• SINGER W.

  Institute of Atmospheric Physics

• HOFFMANN P.

  Institute of Atmospheric Physics

• FACHRUTDINOVA A.

  Kazan State University

• Jacobi Ch.

  Institute For Meteorology University Of Leipzig

• Mitchell N.

  Department Of Physics University Of Wales

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• First results of meteor radar lower thermosphere wind measurements at Dixon, Arctic (73.5゜N, 80゜E)
• Electric fields and meteor radar wind measurements near 95 km over South Pole
• Dynamics of the lower thermosphere over South Pole from meteor radar wind measurements
• Some results of comparison between the lower thermosphere zonal winds as seen by the ground-based radars and WINDII on UARS
• Some results of S-transform analysis of the transient planetary-scale wind oscillations in the lower thermosphere
• Some results of S-transform analysis of the transient planetary-scale wind oscillations in the lower thermosphere.

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