Title: Evaluation of extreme climate over selected eco-climatic regions in Nigeria from observed and simulated (RegCM3) data

Authors: Mary Adefunke Idowu; Olaniran Jonathan Matthew; Adebayo Oluwole Eludoyin

Addresses: Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria ' Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Ile-Ife, Nigeria ' Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria

Abstract: This study examined local ground-based and regional (RegCM3) climate simulated over Nigeria for temporal and spatial changes using selected extreme climate indices. The data were assessed for quality assurance using RClimdex software, before they were analysed for variability, trend and spatio-temporal patterns. Results showed increasing trends in minimum (b = -0.28-0.08°C, p < 0.05) and maximum (b = 0.006-0.05°C; p < 0.05) temperatures. The RegCM3 mirrored the ground-based data for most of the ecological regions, except for Sudan Savanna. The study concluded that different parts of Nigeria experience changes related to local climatic perturbations, and that the RegCM3 is capable of reflecting the inference from ground-based data for most stations.

Keywords: climate event; indices of extreme temperature; regional climate model; RegCM3; temperature changes.

DOI: 10.1504/IJGW.2022.120846

International Journal of Global Warming, 2022 Vol.26 No.2, pp.222 - 232

Received: 03 Aug 2020
Accepted: 14 May 2021
Published online: 14 Feb 2022 *

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