Abstract
In consideration of the characteristics of spectral average of the Rossby wave trains and the adoption of a climatic mean stream field as the basic stream field, an approximate analytical formula for the period of atmospheric low-frequency oscillation (LFO) and the group velocity is deduced from a barotropic and non-divergent linearized vorticity equation. All the action centers of atmosphere are found to be the oscillators of low frequency. The LFO propagates southward across the streamlines in the wind field with a southward component or propagates northward across the streamlines in the wind field with northward component instead of along a great circle. The switch of the propagation direction takes place near the top of ridge or the bottom of trough. The angle between the wave rays and the zonal direction can be determined.
Similar content being viewed by others
References
Hoskins, R. J., Kaloly, D. J., The linear response of a spherical atmosphere to thermal and orographic forcing,J. Atmos. Sci., 1981, 38:1179.
Hoskins, B. J., Ambrizzi, T., Rossby wave propagation on a realistic longitudinally varying flow,J. Atrnos. Sci., 1993, 50:1661.
Zeng Qingcun, The evolution of a Kossby- wave packet in a three-demensional baroclinic atmosphere,J. Atmos. Sci., 1983, 40:73.
Liu Shikuo, Liu Shida, Linear and nonlinear stability problems for the baroclinic Rossby wave,Scientia Sinica, Ser. B, 1985, 28(12):1311.
Zhang Jingyan, The total periodicity of 3-dimensional gradient conjugate systems,Scientia Sinica, Ser. A, 1984, 27(1):41.
Wallace, J. M., The Climatological Mean Stationary Wave:Observational Evidence,Large Dynamical Processes in the Atmosphere (eds. Hoskins, B. J., Pearce, R. P.), London:Academic Press, 1983, 27–54.
Tao Zuyu, Guo Wei, Teleconnection of 5-day averaged 500 hpa height field in winter,Acta Meteorologica Sinica, 1989, 47(4):488.
Wallace, J. M., Gutsler, D., Teleconnection in the geopotential height field during the Northern Hemisphere winter,Mon. Wea. Rev., 1981, 109(4):784.
Huang Ronghui, On the teleconnection and physical mechanism research ol anomalies of east Asian circulation causing summer drought and flood in China, inThe Climate Rsearch of Drought and Flod (in Chinese), Beijing:China Meteorological Press, 1990, 37–50.
Li Chongyin,Low-frequency Oscillation in the Atmosphere (in Chinese), Beijing:China Meteorological Press, 1993, 97–110.
Author information
Authors and Affiliations
Additional information
Project supported by the National Natural Science Foundation of China (Grant No. 49175241).
Rights and permissions
About this article
Cite this article
Xue, F. Effect of atmospheric action center in low-frequency teleconnection mechanism: an explicit analytic study. Sci. China Ser. D-Earth Sci. 41, 586–591 (1998). https://doi.org/10.1007/BF02878740
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02878740