Adeyeri, O. E.Laux, P.Lawin, A. E.Ige, S. O.Kunstmann, H.2025-12-162025-12-162040-2244WOS:000599948400032ORCID:/0000-0002-9735-0677/work/189655225https://hdl.handle.net/1885/733795628Spatiotemporal trends in daily observed precipitation, river discharge, maximum and minimum temperature data were investigated between 1971 and 2013 in the Komadugu-Yobe basin. Significant change points in time series are corrected using Adapted Caussinus-Mestre Algorithm for homogenizing Networks of Temperature series algorithm. Mann-Kendall test and Sen's slope are used to estimate the trend and its magnitude at dry, wet and annual season time scales, respectively. Preliminary results show an increasing trend of the observed variables. There is a latitudinal increase (decrease) in the basin temperature (precipitation) from lower to higher latitudes. The minimum temperature (0.05 degrees C/year) increases faster than the maximum temperature (0.03 degrees C/year). Overall, the percentage changes in minimum temperature range between 3 and 10% while that of maximum temperature ranges between 1 and 3%. Due to precipitation dependence on regional characteristics, the highest percentage change was recorded in precipitation with values between -5 and 97%. In all time scales, river discharge and precipitation have strong positive correlations while the correlation between river discharge and temperature is negative. It is imperative to advocate and support positive developmental practices as well as establishing necessary mitigation measures to cope with the effects of climate in the basin.The first author was supported by a doctoral scholarship from the Federal Ministry of Education and Research (BMBF) and West African Science Service Center on Climate Change and Adapted Land Use (WASCAL). The authors wish to acknowledge the Direction de la Meteorologic Nationale (DMN) of Niger Republic, the Nigeria Meteorological Agency (NiMet) for the climate data used in this study. We also acknowledge the fruitful discussions with Seyni Salack of the WASCAL competent centre, Burkina Faso. We extend our thanks to Peter Domonkos for the provision of the ACMANT package as well as the constructive discussions regarding the use of ACMANT. The anonymous reviewers are also acknowledged. The authors have read and understood the policy on declaration of interests and declare that we have no competing interests.16enKomadugu-Yobe basinLake Chad regionHomogeneity tests in hydrometeorological variablesReturn periodTrends in hydrometeorological variablesWavelet202010.2166/wcc.2019.28385076235718