PANAJI: Over the last century, the amount of rainfall Goa receives has changed little with the state as a whole having witnessed a marginal increase of 2% in rainfall, stated an analysis of rainfall received by Goa by a scientist of the National Institute of Oceanography (NIO). The patterns in rainfall variations for the period from 1928 to 1955 and 1970 to 1986 were studied.
Rainfall received by Quepem and Ponda have increased significantly by 13.5% and 11.5%, respectively.
The study by M R Ramesh Kumar, chief scientist of NIO, Goa, was released in a publication at the ongoing 4th Bharatiya Vigyan Sammelan.
"There are no significant variations in the rainfall pattern over the study area from 1928-1955 to 1970-1986," the report reads. Goa appears to be among areas relatively less affected to the significant changes in precipitation taking place in certain regions due to global warming.
The analysis points out that the variation of rainfall within the small state itself is huge with Valpoi receiving the maximum rainfall of 4,162mm during a season and Panaji receiving the minimum of 2,841mm.
"Goa's coast belongs to a region where the frequency of depression or cyclonic storms is very low. Of the 206 depressions/cyclonic storms that developed in the Arabian Sea during the 105 year-period from 1891 to 1994, only six affected Goa," the study reads.
The study states that in July the number of days with wind speeds in the range of 20 to 61 km per hour are relatively more, making Goa's monsoons windy. The period from June to September contributes to about 89% of annual rainfall. July contributes the maximum rainfall during this period, Ramesh Kumar states in his analysis. July has the maximum number of rainy days at 26.
"Almost all stations received minimum rainfall during 1986, which incidentally was a bad monsoon year for India as a whole," the report states.
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