EMPIRICAL TREND ANALYSIS OF CLIMATE VARIABILITY IN EBONYI STATE, NIGERIA

  • R.U. Onyeneke Department of Agriculture, Alex Ekwueme Federal University, Ndufu-Alike, Ebonyi State, Nigeria
Keywords: Rainfall, temperature, humidity, non-parametric trend analysis, Mann-Kendal, Sen's slope, and Ebonyi State

Abstract

This study assessed the trend in annual and seasonal temperature, rainfall, and relative humidity in Ebonyi State
for the period 1997 to 2017 using time-series data collected from the Federal College of Agriculture, Ishiagu, in
Ebonyi State. The analysis was carried out using the Non-parametric Mann-Kendall trend test, while the Sen's
slope was used to estimate the magnitude of the changes. The results revealed significant increasing trends in
annual and seasonal temperature. The mean annual temperature increased at a rate of 0.14°C annually, the rainy
and dry season mean temperatures increased at the rate of 0.12°C and 0.13°C, respectively. The study found no
significant trends for rainfall in the area during the period under study, decreasing at 0.43 percent per annum.
Furthermore, the paper found a significant trend in mean annual relative humidity, but no significant trends in
seasonal relative humidity.The results of this study are consistent with most studies in the South-East Nigeria,
indicating that temperature is on the increase, with high volatility in rainfall and relative humidity. Hence, proper
adaptation measures should be taken to address the impact of climate change in the study area.

Published
2020-04-30

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eISSN: 0300-368X