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Volume 20 Issue 1

Jan.  2003

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2003 >  20(1): 29-36

Spatial and Time Structure of a Gravity Wave in Horizontal Atmosphere of Heterogeneous Stratification

  • 1.

    Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101,Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101,Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101


doi: 10.1007/BF03342047

  • By the use of the WKBJ method combined with the characteristic line method, the asymptotic solutionof a gravity wave envelope in the atmosphere of horizontal heterogeneous stratification and time-varyingstratification is obtained. The solution shows that not only the variation of amplitude of the gravitywave but also the variation of wavelength and the width of the envelope are affected by the horizontalheterogeneity. As the wave envelope moves from a region of strong stratification to a weak one, thehorizontal wavelength will become shorter, the width of the envelope will narrow and its amplitude willincrease. The variation of stratification with time cannot lead to the variation of wavelength and envelopewidth, but the amplitude of the wave envelope will increase while the amplitude of the wave decreases in time.
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    • Manuscript History

    Manuscript received: 10 January 2003
    Manuscript revised: 10 January 2003
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Spatial and Time Structure of a Gravity Wave in Horizontal Atmosphere of Heterogeneous Stratification

    • 1. Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101,Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101,Meteorological College, PLA University of Sciences and Engineering, Nanjing 211101
    • Manuscript received: 2003-01-10
    • Manuscript revised: 2003-01-10

    Abstract: By the use of the WKBJ method combined with the characteristic line method, the asymptotic solutionof a gravity wave envelope in the atmosphere of horizontal heterogeneous stratification and time-varyingstratification is obtained. The solution shows that not only the variation of amplitude of the gravitywave but also the variation of wavelength and the width of the envelope are affected by the horizontalheterogeneity. As the wave envelope moves from a region of strong stratification to a weak one, thehorizontal wavelength will become shorter, the width of the envelope will narrow and its amplitude willincrease. The variation of stratification with time cannot lead to the variation of wavelength and envelopewidth, but the amplitude of the wave envelope will increase while the amplitude of the wave decreases in time.

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