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• W2098929122 abstract "Drought is a constraint upon development in Sudan. This paper attempts to understand drought and climate change in the central Sudan using the Silyaninov index (SI) because of its simplicity and its required datasets (monthly rainfall and temperature) are routinely collected in developing countries. Also, the ecoclimatological relationships for the natural vegetation cover were investigated using the normalized difference vegetation index (NDVI) and ancillary climatic data. The climate variability in the central Sudan is found to be highly generated by the variability in rainfall rather than temperature. Rainfall experienced a significant decreasing trend (≈ 3.5 mm per annum) coupled with a significant increasing trend in temperature (≈ 1.4oC per annum) during the period 1960 to 2010. Accordingly, the aridity increased significantly at 50% of the studied stations. SI is found to be more effective in detecting drought than using rainfall dataset alone. However, when the temperature dataset is anomalies-free it could explain effectively most of the historical meteorological droughts witnessed in central Sudan. Using SI, the majority of the drought events were observed in 1970 to 1990, with the exception of Damazine (1998 to 2002) and Ed Duim stations (2000 – 2005). The common wetted years outweighed the common drought years, revealing the localized behavior of the rainfall. The analysis of NDVI showed that the vegetation cover experiences a decreasing pattern under the semi dry (Ed Duim station) and semi humid (Damazine station) climatic zones during the period 2000 to 2010. The relationships of NDVI-SI and NDVI-rainfall were found better than the NDVI- temperature. Key words: Central Sudan, drought, climate change, natural vegetation cover, Silyaninov index, normalized difference vegetation index (NDVI)." @default.
• W2098929122 created "2016-06-24" @default.
• W2098929122 creator A5042573425 @default.
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• W2098929122 date "2014-05-31" @default.
• W2098929122 modified "2023-10-04" @default.
• W2098929122 title "Assessment of Silyaninov index for detecting climatic changes and droughts in the central Sudan" @default.
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• W2098929122 doi "https://doi.org/10.5897/ijwree2013.414" @default.
• W2098929122 hasPublicationYear "2014" @default.
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