Analysis of Rainfall and Temperature Variability over Nigeria
Keywords:
rainfall, temperature, coefficient of skewness, kurtosis and variations
Abstract
This study investigates rainfall and temperature variabilities in Nigeria using observations of air temperature oC and rainfall mm from 25 synoptic stations from 1971-2000 30years The data were analyzed for the occurrences of abrupt changes in temperature and rainfall values over Nigeria while temporal and spatial trends were also investigated Statistical approach was deployed to determine the confidence levels coefficients of kurtosis skewness and coefficient of variations Analysis of air temperature indicated that in the first decade of 1971-1980 anomalies between -0 2 and -1 6 were predominant in the second decade of 1981-1990 only five stations Lokoja Kaduna Bida Bauchi and Warri shows positive anomaly while greater portion of the country were normal with evidence of warming in the third decade of 1991-2000 Results further indicated that there have been statistically significant increases in precipitation and air temperature in vast majority of the country Analyses of long time trends and decadal trends in the time series further suggest a sequence of alternately decreasing and increasing trends in mean annual precipitation and air temperature in Nigeria during the study period
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Published
2014-03-15
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