GRAVITY WAVES ON THE AXIS OF LOW LEVEL JET AND THEIR INSTABILITY

Sun Shuqing

doi:10.1007/BF03179743

Impact Factor: 5.8

Volume 2 Issue 1

Jan. 1985

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Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1985 > 2(1): 112-123

GRAVITY WAVES ON THE AXIS OF LOW LEVEL JET AND THEIR INSTABILITY

Sun Shuqing

1.
Institute of Atmospheric Physics, Academia Sinica, Beijing

Sun Shuqing

doi: 10.1007/BF03179743

Abstract
References
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Abstract:
Using the wind data at mountain stations, gravity waves on the axis of low level jet and their relation to rain clusters have been studied by means of the spectrum method. It is found that the spectrum densities of both wind and rainfall reach their maximums at the period of 8 h and the module between wind and rainfall also reach the maximum in that range. Both observation and theoretical study give the same con-clusion that the unstable development of gravity waves depends not only on the atmospheric stratification but also on the vertical shear of the environmental wind. The appearance of the jet-shape vertical profile of wind is favourable for the unstable development of gravity waves. The lower the height of the axis, the larger the growth rate of amplitude.
References

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Manuscript History

Manuscript received: 10 January 1985

Manuscript revised: 10 January 1985

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

GRAVITY WAVES ON THE AXIS OF LOW LEVEL JET AND THEIR INSTABILITY

Sun Shuqing

1. Institute of Atmospheric Physics, Academia Sinica, Beijing

Manuscript received: 1985-01-10
Manuscript revised: 1985-01-10

Abstract: Using the wind data at mountain stations, gravity waves on the axis of low level jet and their relation to rain clusters have been studied by means of the spectrum method. It is found that the spectrum densities of both wind and rainfall reach their maximums at the period of 8 h and the module between wind and rainfall also reach the maximum in that range. Both observation and theoretical study give the same con-clusion that the unstable development of gravity waves depends not only on the atmospheric stratification but also on the vertical shear of the environmental wind. The appearance of the jet-shape vertical profile of wind is favourable for the unstable development of gravity waves. The lower the height of the axis, the larger the growth rate of amplitude.