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Low-Frequency CISK-Rossby Wave and Stratospheric QBO in the Tropical Atmosphere


doi: 10.1007/s00376-000-0012-y

  • Dynamic study is undertaken of the tropical atmospheric CISK-Rossby wave genesis and propagation mechanisms, the vertical structure of the low-frequency wave and the basic characteristics and constraint of the vertical transport of momentum and wave energy fluxes in relation to the quasi-biennial oscillation (QBO) of the stratospheric zonal winds over the tropics in the context of a baroclinic quasi-geoslrophic model. Results suggest that in the properly posed thermal conditions and zonal belt there exist two kinds of CISK-Rossby waves of low frequency (LF) and very low frequency (VLF), travelling zonally in opposite di-rections, which act as sources responsible for upward transferring momentum and wave energy fluxes for easterly and westerly perturbations in such a way as to provide required momentum and energy for the stratospheric QBO genesis and maintenance. The present study offers interpretations for some of the fun-damental observational facts of the QBO and proposes mew ideas of the QBO generation mechanism.
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    [9] Qiwei WANG, Ming XUE, Zhemin TAN, 2016: Convective Initiation by Topographically Induced Convergence Forcing over the Dabie Mountains on 24 June 2010, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1120-1136.  doi: 10.1007/s00376-016-6024-z
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Manuscript History

Manuscript received: 10 April 2000
Manuscript revised: 10 April 2000
通讯作者: 陈斌, bchen63@163.com
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Low-Frequency CISK-Rossby Wave and Stratospheric QBO in the Tropical Atmosphere

  • 1. Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101,Department of Atmospheric Sciences, Nanjing University, Nanjing 210093

Abstract: Dynamic study is undertaken of the tropical atmospheric CISK-Rossby wave genesis and propagation mechanisms, the vertical structure of the low-frequency wave and the basic characteristics and constraint of the vertical transport of momentum and wave energy fluxes in relation to the quasi-biennial oscillation (QBO) of the stratospheric zonal winds over the tropics in the context of a baroclinic quasi-geoslrophic model. Results suggest that in the properly posed thermal conditions and zonal belt there exist two kinds of CISK-Rossby waves of low frequency (LF) and very low frequency (VLF), travelling zonally in opposite di-rections, which act as sources responsible for upward transferring momentum and wave energy fluxes for easterly and westerly perturbations in such a way as to provide required momentum and energy for the stratospheric QBO genesis and maintenance. The present study offers interpretations for some of the fun-damental observational facts of the QBO and proposes mew ideas of the QBO generation mechanism.

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