Relationships between the Global General Circulation and the Indian Summer Monsoon

M. Sankar-Rao; V. N. Lykossov; E. M. Volodin; A. E. Nikitin; A. I. Degtiarev; Kusuma G. Rao

doi:10.1007/BF02658090

Impact Factor: 5.8

Volume 8 Issue 2

Mar. 1991

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1991 > 8(2): 137-148

Relationships between the Global General Circulation and the Indian Summer Monsoon

1.
Department of Aerospace Engineering and Centre for Atmospheric Sciences, Indian Institute of Science, Bangalore 560012, INDIA,Department of Numerical Mathematics, USSR Academy of Sciences, Moscow, USSR,Department of Numerical Mathematics, USSR Academy of Sciences, Moscow, USSR,Hydrometeorological Centre, Moscow, USSR,Hydrometeorological Centre, Moscow, USSR,Centre for Atmospheric Sciences, Indian Institute of Science, Bangalore 560012, INDIA

doi: 10.1007/BF02658090

Abstract
References
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Abstract:
The relationships between the global general circulation and the Indian monsoon during active and break phases are investigated with the help of FGGE IIIb data.It was found that the ultralong wave component positive and negative height anomalies over Tibet are associated with active and break monsoon phases respectively. This ultralong wave component has significant effect even upto 22oN over the Indian region which is the monsoon trough region. During a monsoon break, the general circulation was found to be more turbulent in the sense that more waves become energised.It was observed that during a break, blocking prevails over the Siberian region and cold air advection takes place toward Indian region from Siberian region depressing the temperatures over the Indian region by about 1oC. During the break, the Indian region gets connected with higher latitudes by the south winds blowing from polar Soviet re-gions to the Indian region. From active to break phase the zonal component weakens by about 25% from Indian ocean area right upto Alaskan region, along the east coast of Asia.
References

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Manuscript History

Manuscript received: 10 March 1991

Manuscript revised: 10 March 1991

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

Relationships between the Global General Circulation and the Indian Summer Monsoon

1. Department of Aerospace Engineering and Centre for Atmospheric Sciences, Indian Institute of Science, Bangalore 560012, INDIA,Department of Numerical Mathematics, USSR Academy of Sciences, Moscow, USSR,Department of Numerical Mathematics, USSR Academy of Sciences, Moscow, USSR,Hydrometeorological Centre, Moscow, USSR,Hydrometeorological Centre, Moscow, USSR,Centre for Atmospheric Sciences, Indian Institute of Science, Bangalore 560012, INDIA

Manuscript received: 1991-03-10
Manuscript revised: 1991-03-10

Abstract: The relationships between the global general circulation and the Indian monsoon during active and break phases are investigated with the help of FGGE IIIb data.It was found that the ultralong wave component positive and negative height anomalies over Tibet are associated with active and break monsoon phases respectively. This ultralong wave component has significant effect even upto 22oN over the Indian region which is the monsoon trough region. During a monsoon break, the general circulation was found to be more turbulent in the sense that more waves become energised.It was observed that during a break, blocking prevails over the Siberian region and cold air advection takes place toward Indian region from Siberian region depressing the temperatures over the Indian region by about 1oC. During the break, the Indian region gets connected with higher latitudes by the south winds blowing from polar Soviet re-gions to the Indian region. From active to break phase the zonal component weakens by about 25% from Indian ocean area right upto Alaskan region, along the east coast of Asia.