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Volume 19 Issue 4

Jul.  2002

Article Contents
Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2002 >  19(4): 741-756

Critical Time Span and Nonlinear Action Structure of Climatic Atmosphere and Ocean

  • 1.

    Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003;National Research Center for Marine Environmental Forecasts, Beijing 100081;Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA,Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003,Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA,National Research Center for Marine Environmental Forecasts, Beijing 100081,National Research Center for Marine Environmental Forecasts, Beijing 100081,National Research Center for Marine Environmental Forecasts, Beijing 100081


doi: 10.1007/s00376-002-0013-0

  • This paper studies the critical time span and the approximate nonlinear action structure of climatic atmosphere and ocean. The critical time span of the climatic atmosphere and ocean, which is related to the spatial resolution required, the strength of nonlinear action, and the calculation exactness, may represent the relative temporal scale of predictability. As far as the same characteristic spatial scale is concerned, the minimum critical time span of the ocean is about 9 times of that of atmosphere, several days or more. Usually,the stronger the nonlinear action, the shorter the critical time span with smooth changes of external forces.The approximate structure of nonlinear action of climatic atmosphere and ocean is: the nonlinear action decreases usually with increasing latitude, which is related to the role of the Coriolis force in fluid motion (forming geostrophic current); the nonlinear action changes with the anomalous cyclonic or anticyclonic circulation shear, for instance, when the strength of anomalous eastward zonal circulation is comparable to that of anomalous meridional circulation, the nonlinear action is the strongest; wind stress plus gradient forces enhance the nonlinear action, etc..
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    • Manuscript History

    Manuscript received: 10 July 2002
    Manuscript revised: 10 July 2002
    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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    Critical Time Span and Nonlinear Action Structure of Climatic Atmosphere and Ocean

    • 1. Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003;National Research Center for Marine Environmental Forecasts, Beijing 100081;Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA,Institute of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003,Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA,National Research Center for Marine Environmental Forecasts, Beijing 100081,National Research Center for Marine Environmental Forecasts, Beijing 100081,National Research Center for Marine Environmental Forecasts, Beijing 100081
    • Manuscript received: 2002-07-10
    • Manuscript revised: 2002-07-10

    Abstract: This paper studies the critical time span and the approximate nonlinear action structure of climatic atmosphere and ocean. The critical time span of the climatic atmosphere and ocean, which is related to the spatial resolution required, the strength of nonlinear action, and the calculation exactness, may represent the relative temporal scale of predictability. As far as the same characteristic spatial scale is concerned, the minimum critical time span of the ocean is about 9 times of that of atmosphere, several days or more. Usually,the stronger the nonlinear action, the shorter the critical time span with smooth changes of external forces.The approximate structure of nonlinear action of climatic atmosphere and ocean is: the nonlinear action decreases usually with increasing latitude, which is related to the role of the Coriolis force in fluid motion (forming geostrophic current); the nonlinear action changes with the anomalous cyclonic or anticyclonic circulation shear, for instance, when the strength of anomalous eastward zonal circulation is comparable to that of anomalous meridional circulation, the nonlinear action is the strongest; wind stress plus gradient forces enhance the nonlinear action, etc..

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