Influence of Spatial and Temporal Scales on Statistical Analyses of Rainfall Variability in the River Nile Basin

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dc.contributor.authorOnyutha, Charles
dc.contributor.authorWillems, Patrick
dc.date.accessioned2022-09-15T09:33:44Z
dc.date.available2022-09-15T09:33:44Z
dc.date.issued2016
dc.description.abstractIn this study, empirical orthogonal function was applied to analyze rainfall variability in the Nile Basin based on various spatio-temporal scales. The co-occurrence of rainfall variability and the variation in selected climate indices was analyzed based on various spatio-temporal scales. From the highest to the lowest, the cumulative amount of variance explained by the first two principal components (PCs) for any selected size of the spatial domain was obtained for the annual, seasonal, and monthly rainfall series respectively. The variability in the annual rainfall of 1⁰×1⁰ spatial coverage explained by only the first PC was about 55% on average. However, this percentage reduced to about 40% on average across the study area when the size of the spatial domain was increased from 1⁰×1⁰ to 10⁰×10⁰. The variation in climate indices was shown to explain rainfall variability more suitably at a regional than location-specific spatial scale. The magnitudes and sometimes signs of the correlation between rainfall variability and the variation in climate indices tended to vary from one time scale to another. These findings are vital in the selection of spatial and temporal scales for more considered attribution of rainfall variability across the study area.en_US
dc.identifier.citationOnyutha, Charles, Willems, Patrick, Influence of Spatial and Temporal Scales on Statistical Analyses of Rainfall Variability in the River Nile Basin. Dynamics of Atmospheres and Oceans http://dx.doi.org/10.1016/j.dynatmoce.2016.10.008en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.dynatmoce.2016.10.008
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/4773
dc.language.isoenen_US
dc.publisherDynamics of Atmospheres and Oceansen_US
dc.subjectEmpirical Orthogonal Function (EOF)en_US
dc.subjectVariability Analysesen_US
dc.subjectRiver Nile Basinen_US
dc.subjectClimate Variabilityen_US
dc.subjectRainfall Variabilityen_US
dc.subjectMeteorologyen_US
dc.titleInfluence of Spatial and Temporal Scales on Statistical Analyses of Rainfall Variability in the River Nile Basinen_US
dc.typeArticleen_US
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