A study of tropospheric wave disturbances over India in winter |
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| Authors: | I Subbaramayya A S N Raju |
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| Institution: | (1) Department of Meteorology and Oceanography, Andhra University Visakhapatnam, India |
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| Abstract: | The wave disturbances in the troposphere over north and central India during winter when the subtropical westerlies prevail in the upper air over the area have been investigated by power-and cross-spectrum analysis. The power-spectrum study revealed the existence of basically two systems of periods 10.0–12.5 days and 4.5–5.5 days in the middle and upper troposphere. Both the long-and short-period systems have been found to be propagating eastwards at rates 5° and 10° long./day respectively. In both the cases lower temperatures are found to the east of the troughs. It is also noted that these systems build up the meridional temperature gradient and hence strengthen the upper tropospheric westerlies. Synoptic study of the transient systems is presented. |
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| Keywords: | India: Troposphere Wave disturbance |
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