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Absence of tropical disturbances and rainfall distribution during the summer monsoon months over India

Dhar, ON and Mandal, BN and Rakhecha, PR (1982) Absence of tropical disturbances and rainfall distribution during the summer monsoon months over India. Archives for Meteorology, Geophysics, and Bioclimatology Series A, 31 (1-2). pp. 117-126.

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Abstract

The distribution of rainfall over the Indian land area north of lat. 15°N, excluding hilly sub-divisions of the Himalayas and northeast India, has been studied for those monsoon months of June to September which did not experience tropical disturbances (i.e. monsoon depressions/cyclonic storms) during the 80-year period from 1891. This study has shown that in individual monsoon months, absence of these disturbances coupled with certain other meteorological situations, such as (a) delayed onset of monsoon in June or its early withdrawal in September, (b) northward shift of the axis of the seasonal monsoon trough from its normal position and or (c) non-occurrence of low pressure systems and their westward movement along the trough axis, can cause substantial decrease of rainfall over the Indian area. Of the 4 monsoon months, the month of September appears to be the worst affected by the absence of these disturbances.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 18 Apr 2015 04:31
Last Modified: 18 Apr 2015 04:31
URI: http://moeseprints.incois.gov.in/id/eprint/1318

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