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地转动量假定下风场近似与扰动的稳定性 被引量:4

ACCURACY OF WIND APPROXIMATION AND STABILITY OF DISTURBANCE UNDER THE ASSUMPTION OF GEOSTROPHIC MOMENTUM
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摘要 在大尺度系统中,由于Rossby数很小,大气呈准地转运动。但在低纬度地区或中小尺度系统中,Rossby数不是小参数,运动的非地转特征就很明显了。为了避免非线性问题中数学处理的复杂性,可以使用半地转近似,这不但可以使问题得到线性化,而且其结果又有非线性的主要特征。本文在半地转假定下,当风压场处于平衡状态时,我们得到了一种简单的表示式,并将它与Rossby近似和Phillips近似进行了比较。 In this paper,the accuracy of wind approximation of geostrophic momentum compared with others e.g.Rossby approximation and Phillips approximation is discussed.The stability of the disturbance under the assumption of geostrophic momentum is studied.
作者 伍荣生 王辉 Wu Rongsheng;Wang Hui(Department of Atmospheric Sciences,Nanjing Universiy)
出处 《气象学报》 1988年第2期246-250,共5页 Acta Meteorologica Sinica
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同被引文献20

  • 1柳洪,赵鸣.自由大气的扰动对边界层结构影响的二维数值研究[J].气象科学,1989,9(2):159-167. 被引量:1
  • 2F. T. M. Nieuwstadt.On the solution of the stationary, baroclinic Ekman-layer equations with a finite boundary-layer height[J]. Boundary - Layer Meteorology . 1983 (4)
  • 3Blumen,W,Wu,R.Baroclinic instability and frontogenesis with Ekman boundary layer dynamics incorporating the geostrophic momentum upproximation. Journal Abbreviation Sources . 1982
  • 4Blumen,W.Unstable Nonlinear Evolution of an Eady Wave in Time-Dependent Basic Flows and Frontogenesis. Journal of the Atmospheric Sciences . 1979
  • 5Tan,Zhemin,Wu,Rongsheng.Dynamics of Ekman flow and frontognesis. Scientia Sinica (Ser.B) . 1990
  • 6Wu,R.,Blumen,W.‘An Analysis of Ekman Boundary Layer Dynamics Incorporating the Geostrophic Momentum Approximation’. Journal of the Atmospheric Sciences . 1982
  • 7Wu,Rongsheng.Boundary layer flow above orography. Journal of the American Mathematical Society . 1984
  • 8Wu,Rongsheng.Dynamics of semi-geostrophic flow. Scientia Sinca (Ser.B) . 1984
  • 9Eliassen,A.,Bolin,B.On the formation of fronts in the atmosphere. The Atmosphere and the Sea in Motion . 1959
  • 10Hoskins,B. J.‘The Geostrophic Momentum Approximation and the Semi-Geostrophic Equations’. Journal of the Atmospheric Sciences . 1975

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