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An index of summer monsoon rainfall excess over India and its variability: 1871-1978

Mooley, DA and Parthasarathy, B and Sontakke, NA (1982) An index of summer monsoon rainfall excess over India and its variability: 1871-1978. Archives for Meteorology, Geophysics, and Bioclimatology Series B, 31 (3). pp. 301-311.

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To assess the excess in the activity of the summer monsoon (June to September) over India during the period 1871 to 1978, an index based on the percentage area with a specified percentage seasonal rainfall excess and termed as the Monsoon Excess Index (MEI) has been used. On examination of MEI series it is found that it is homogeneous and random and has a high variability. The distribution of MEI is positively skewed and Gamma probability model is observed to be a good fit to the series. Considering the year in which the MEI value exceeds the nineth decile, i.e. 35, of the Gamma distribution fitted to the MEI series, as year of large-scale excess over India, such years have been identified during the period 1871-1978. There are ten such years. These excess years are found to be randomly distributed in time.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 17 Apr 2015 11:30
Last Modified: 17 Apr 2015 11:30

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