The onset of the southwest monsoon over Kerala: 1901–1980

R. Ananthakrishnan, M. K. Soman

doi:10.1002/joc.3370080305

The onset of the southwest monsoon over Kerala: 1901–1980

DOI Web Site Web Site 被引用文献7件

書誌事項

公開日: 1988-05

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1002/joc.3370080305

公開者: Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>Utilising daily mean rainfall from dense rain gauge networks, the dates of onset of the southwest monsoon over south and north Kerala have been derived on the basis of objective criteria for the years 1901 to 1980. These dates have been compared with the onset dates as per records of the India Meteorological Department. Statistics of the onset dates are presented. The mean onset date for south Kerala is found to be 30 May and for north Kerala 1 June with a standard deviation of about 9 days in both cases. The sharp increase in rainfall that heralds the onset of the monsoon is highlighted by superposed epoch analysis. The prevailing notion that rainfall from pre‐monsoon thunderstorms progressively increases and merges with the monsoon rainfall is shown to be not valid.</jats:p>