A STUDY OF STATIONARY WAVE-WAVE INTERACTIONS IN A LOW ORDER STRATOSPHERIC MODEL

被引：1

作者：

MCLANDRESS, C

DEROME, J

机构：

[1] Department of Meteorology, McGill University, Montreal, QC

来源：

JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN | 1990年 / 68卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.2151/jmsj1965.68.5_539

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Interactions among stationary planetary waves in a low-order spherical stratospheric model are studied both analytically and numerically. A triad of interacting waves is examined using a steady-state hemispheric quasi-geostrophic model with a mean zonal wind in solid body rotation. Due to the structure of the model basic state, dissipation is required for the waves to interact. It is found that the nonlinear structure of the two gravest forced modes is independent of their relative position only if the third mode is unforced at the lower boundary. In this case the degree to which the nonlinearities act to amplify or phase shift the linear waves is shown to be dependent upon the vertical propagation characteristics of the waves. Large horizontal scale waves and weak zonal westerlies are found to be conditions which can result in significant amplitude changes due to the wave-wave interaction. As the scale of the wave is reduced and/or the speed of the mean zonal westerlies is increased, the predominant changes occur in the wave phases. Numerical solutions using realistic boundary forcing amplitudes and realistic dissipation are found to be only weakly nonlinear, despite the fact that the planetary waves distort considerably the polar vortex. © 1990, Meteorological Society of Japan.

引用

页码：539 / 548

页数：10

共 10 条

[1]

Ashe S., A nonlinear model of the time-average axially asymmetric flow induced by topography and diabatic heating, J. Atmos. Sci., 36, pp. 109-126, (1979)

[2]

Charney J.G., Drazin P.G., Propagation of planetary-scale disturbances from the lower into the upper stratosphere, J. Geophys. Res., 66, pp. 83-109, (1961)

[3]

Derome J., On quasi-geostrophic, finite-amplitude disturbances forced by topography and diabatic heating, Tellus, 36A, pp. 313-319, (1984)

[4]

Egger J., Nonlinear aspects of the theory of standing waves, Beitr. Phys. Atmos, 49, pp. 71-80, (1976)

[5]

Holton J.R., Mass C., Stratospheric vascillation cycles, J. Atmos. Sci, 33, pp. 2218-2225, (1976)

[6]

Lindzen R.S., Kuo H.-L., A reliable method for the numerical integration of a large class of ordinary and partial differential equations, Mon. Wea. Rev, 97, pp. 732-734, (1969)

[7]

Matsuno T., Vertical propagation of stationary planetary waves in the winter northern hemisphere, J. Atmos. Sci., 27, pp. 871-883, (1970)

[8]

Robinson W.A., Interactions among Planetary Waves and the Generation of Traveling Long Waves, (1985)

[9]

Robinson W.A., Interactions between stationary planetary waves in the stratosphere, J. Atmos. Sci., 43, pp. 1006-1016, (1986)

[10]

Schoeberl M.R., Geller M.A., A calculation of the structure of stationary planetary waves in winter, J. Atmos. Sci., 34, pp. 1235-1255, (1977)

← 1 →