Andrew Manoba Limantol, Isaac Larbi, Sam-Quarcoo Dotse, Gloria Chinwendu Okafor, Peter Asare-Nuamah, Louis Kusi Frimpong, Abdul-Rauf Malimanga Alhassan, Emmanuel Angmor, Jilly Philippa Joel Premkumar, George Lutterodt, Theodora Akweley Asiamah, Thomas Atta-Darkwa, Naomi Kumi, Nana Agyemang Prempeh

An increase in temperature under the shared socioeconomic scenarios in the Volta River Basin, West Africa: implications for economic development

  • Management, Monitoring, Policy and Law
  • Atmospheric Science
  • Water Science and Technology
  • Global and Planetary Change
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Abstract This study examined the temperature variations in West Africa's Volta River Basin (VRB) from 2021 to 2050 in comparison to the historical period (1985–2014) under two Shared Socioeconomic Pathway Scenarios (SSP2-4.5 and SSP5-8.5). Datasets from three Global Climate Models (GCMs) of the sixth Coupled Model Intercomparison Project (CMIP6) were used. The GCMs and their ensemble were evaluated on a monthly scale. The study used the ensemble mean to analyse the changes in annual and monthly temperature over the Sahel, Savannah, Guinea Coast, and the entire Volta basin. The results demonstrate the individual GCMs reproduced the observed temperature pattern at the VRB, though with some overestimations, but the ensemble mean indicated a better representation of the observed temperature. A warming trend in the basin is projected under both climate scenarios, with higher temperatures projected under SSP5-8.5 compared to SSP2-4.5 in all three zones. The mean annual temperature is projected to increase by 0.8 and 1.0 °C, with a statistically increasing trend under SSP2-4.5 and SSP5-8.5, respectively. Without a doubt, high temperatures, if unchecked, can erupt into resource conflict among the competing interest groups, thereby affecting the achievement of economic development at the VRB.

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