CISK-rossby wave and the 30-60 Day Oscillation in the Tropics

Liao Qinghai; Li Chongyin

doi:10.1007/BF02661282

Impact Factor: 5.8

Volume 12 Issue 1

Jan. 1995

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1995 > 12(1): 1-12

CISK-rossby wave and the 30-60 Day Oscillation in the Tropics

1.
InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029

doi: 10.1007/BF02661282

Abstract
References
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Abstract:
The 30-60 day oscillation is an important aspect of the atmospheric variance in the tropical area. A number of works have been done on this phenomenon, this article is a further one. A quasi-geostrophic linear model that consists of a two-layer free atmosphere and a well-mixed boundary layer is used to investigate the instability of intraseasonal oscillation, its propagation and vertical structures. Results show that the dynamical coupling and interaction between the barotropic and baroclinic components via boundary layer convergence / divergence are responsible for the appearance of a new kind of low-frequency wave. Such wave is very different from the traditional tropical Rossby wave. It can propagate westward and eastward. Some behaviours of it appear to resemble the observed 30-60 day oscillation mode in many aspects, such,as vertical structures, zonal and meridional propagations. Now many researchers emphasize the direct relationship between CISK-Kelvin mode and the tropical atmospheric 30-60 oscillation. It is considered that CISK-Rossby mode should not be neglected.
- CISK-Rossby wave,
- 30-60 day oscillation in the tropics
References

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[2]	Jiang Guorong, 1996: CISK-related Rossby Waves in the Tropical Atmosphere, ADVANCES IN ATMOSPHERIC SCIENCES, 13, 115-123. doi: 10.1007/BF02657032
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[4]	Song Yi, Chen Longxun, 1992: The Characteristics of 30-60 Day Oscillation and Its Relations to the Interannual Oscillations, ADVANCES IN ATMOSPHERIC SCIENCES, 9, 323-336. doi: 10.1007/BF02656942
[5]	Luo Dehai, 1999: Bifurcation of Nonlinear Kelvin Wave-CISK with Conditional Heating in a Truncated Spectral Model: A Possible Mechanism of 30-60-Day Osculation at the Equator, ADVANCES IN ATMOSPHERIC SCIENCES, 16, 279-296. doi: 10.1007/BF02973088
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Manuscript History

Manuscript received: 10 January 1995

Manuscript revised: 10 January 1995

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

CISK-rossby wave and the 30-60 Day Oscillation in the Tropics

1. InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029

Manuscript received: 1995-01-10
Manuscript revised: 1995-01-10

Abstract: The 30-60 day oscillation is an important aspect of the atmospheric variance in the tropical area. A number of works have been done on this phenomenon, this article is a further one. A quasi-geostrophic linear model that consists of a two-layer free atmosphere and a well-mixed boundary layer is used to investigate the instability of intraseasonal oscillation, its propagation and vertical structures. Results show that the dynamical coupling and interaction between the barotropic and baroclinic components via boundary layer convergence / divergence are responsible for the appearance of a new kind of low-frequency wave. Such wave is very different from the traditional tropical Rossby wave. It can propagate westward and eastward. Some behaviours of it appear to resemble the observed 30-60 day oscillation mode in many aspects, such,as vertical structures, zonal and meridional propagations. Now many researchers emphasize the direct relationship between CISK-Kelvin mode and the tropical atmospheric 30-60 oscillation. It is considered that CISK-Rossby mode should not be neglected.

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