(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 905-909
I. O. Agada, P. O. Agada and G. T. Fila

keywords: Air temperature, climate variability, relative humidity


This work examines the year to year and month to month variability of relative humidity and air temperature in Kano and Port-Harcourt, Nigeria. Thirty-four (34) years data of relative humidity and air temperature were sourced from the archives of the International Institute of Tropical Agriculture (IITA) Ibadan, Oyo State, Nigeria. A descriptive statistic such as the mean and its 95% confidence interval were determined for each climatic parameter. For each station, the 95% confidence interval for the monthly mean of each parameter shows with 95% certainty that the mean lies in the established interval. The One-way Analysis of Variance (ANOVA) was employed in checking whether the variability in the climatic parameters is affected by season. This was done by comparing the monthly mean of each parameter for each station. The comparison revealed a significant difference in the means (p<0.05) for each parameter in each station showing a seasonal effect. Using graphical method, the study revealed a year to year and a month to month variability in the climatic parameters. The year to year and month to month variability pattern of relative humidity and air temperature is the same in Port Harcourt showing a direct relationship between the two parameters. In Kano, the pattern shows that when air temperature is increasing, relative humidity is decreasing and vice versa showing an inverse relationship. Since saturation vapour pressure relates inversely to relative humidity, then it can be inferred that the Claussius-Clapeyron equation establishes an inverse theoretical relationship between relative humidity and air temperature. It was established in this work that the equation confirms this relationship for the city of Kano but negates it for the city of Port Harcourt. Why is this so? The researchers were able to harness the climatic features of each city in answering this question. They finalized that the climatic features of a place as it affect relative humidity and air temperature determines whether the place upholds the established behavior of the Claussius-Clapeyron Equation or not.


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