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Volume 10 Issue 3

Jul.  1993

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 1993 >  10(3): 296-306

Some Effects of Rotation Rate on Planetary-Scale Wave Flows

  • 1.

    Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100080,Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida, U. S. A.,Geophysical Fluid Dynamics Institute and Department of Meteorology, Florida State University, Tallahassee, Florida, U. S. A.


doi: 10.1007/BF02658135

  • A series of experiments were performed in a rotating annulus of fluid to study effects of rotation rate on planeta-ry-scale baroclinic wave flows. The experiments reveal that change in rotation rate of fluid container causes variation in Rossby number and Taylor number in flows and leads to change in flow patterns and in phase and amplitude of quasi-stationary waves. For instance, with increasing rotation rate, amplitude of quasi-stationary waves increases and phase shifts upstream. On the contrary, with decreasing rotation rate, amplitude of quasi-stationary waves decreases and phase shifts downstream. In the case of the earth’s atmosphere, although magnitude of variation in earth’s rotation rate is very small, yet it causes a very big change in zonal velocity component of wind in the atmosphere and of currents in the ocean, and therefore causes a remarkable change in Rossby number and Taylor number deter-mining regimes in planetary-scale geophysical flows. The observation reveals that intensity and geographic location of subtropic anticyclones in both of the Northern and Southern Hemispheres change consistently with the variation in earth’s rotation rale. The results of fluid experiments are consistent, qualitatively, with observed phenomena in the atmospheric circulation.
  • [1] Li Maicun, 1987: ON THE LOW-FREQUENCY, PLANETARY-SCALE MOTION IN THE TROPICAL ATMOSPHERE AND OCEANS, ADVANCES IN ATMOSPHERIC SCIENCES, 4, 249-263.  doi: 10.1007/BF02663596
    [2] Luo Dehai, Li Jianping, Huang Fei, 2002: Life Cycles of Blocking Flows Associated with Synoptic-Scale Eddies: Observed Results and Numerical Experiments, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 594-618.  doi: 10.1007/s00376-002-0003-2
    [3] LUO Dehai, LIU Jinting, LI Jianping, 2010: Interaction between Planetary-Scale Diffluent Flow and Synoptic-Scale Waves During the Life Cycle of Blocking, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 807-831.  doi: 10.1007/s00376-009-9074-7
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    [5] Guanshun ZHANG, Jiangyu MAO, Wei HUA, Xiaofei WU, Ruizao SUN, Ziyu YAN, Yimin LIU, Guoxiong WU, 2023: Synergistic Effect of the Planetary-scale Disturbance, Typhoon and Meso-β-scale Convective Vortex on the Extremely Intense Rainstorm on 20 July 2021 in Zhengzhou, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 428-446.  doi: 10.1007/s00376-022-2189-9
    [6] Qian Yongfu, 1991: Numerical Experiments of the Effects of Initial Desert Moisture on the Climate Change, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 459-470.  doi: 10.1007/BF02919268
    [7] Chen Yuxiang, Ji Liren, Shen Rujin, 1985: THE NUMERICAL EXPERIMENTS ON DYNAMIC FORCING BY THE TIBETAN PLATEAU FOR VARIOUS ZONAL FLOWS, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 189-199.  doi: 10.1007/BF03179751
    [8] Luo Dehai, Li Jianping, 2001: Interaction between a Slowly Moving Planetary-Scale Dipole Envelope Rossby Soliton and a Wavenumber-Two Topography in a Forced Higher Order Nonlinear Schr dinger Equation, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 239-256.  doi: 10.1007/s00376-001-0017-1
    [9] Jae-Jin KIM, Jong-Jin BAIK, 2005: Physical Experiments to Investigate the Effects of Street Bottom Heating and Inflow Turbulence on Urban Street-Canyon Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 230-237.  doi: 10.1007/BF02918512
    [10] Yong. L. McHall, 1992: Nonlinear Planetary Wave Instability and Blocking, ADVANCES IN ATMOSPHERIC SCIENCES, 9, 173-190.  doi: 10.1007/BF02657508
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    • Manuscript History

    Manuscript received: 10 July 1993
    Manuscript revised: 10 July 1993
    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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    Some Effects of Rotation Rate on Planetary-Scale Wave Flows

    • 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100080,Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida, U. S. A.,Geophysical Fluid Dynamics Institute and Department of Meteorology, Florida State University, Tallahassee, Florida, U. S. A.
    • Manuscript received: 1993-07-10
    • Manuscript revised: 1993-07-10

    Abstract: A series of experiments were performed in a rotating annulus of fluid to study effects of rotation rate on planeta-ry-scale baroclinic wave flows. The experiments reveal that change in rotation rate of fluid container causes variation in Rossby number and Taylor number in flows and leads to change in flow patterns and in phase and amplitude of quasi-stationary waves. For instance, with increasing rotation rate, amplitude of quasi-stationary waves increases and phase shifts upstream. On the contrary, with decreasing rotation rate, amplitude of quasi-stationary waves decreases and phase shifts downstream. In the case of the earth’s atmosphere, although magnitude of variation in earth’s rotation rate is very small, yet it causes a very big change in zonal velocity component of wind in the atmosphere and of currents in the ocean, and therefore causes a remarkable change in Rossby number and Taylor number deter-mining regimes in planetary-scale geophysical flows. The observation reveals that intensity and geographic location of subtropic anticyclones in both of the Northern and Southern Hemispheres change consistently with the variation in earth’s rotation rale. The results of fluid experiments are consistent, qualitatively, with observed phenomena in the atmospheric circulation.

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