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Climate Trends, variability, and impacts of ENSO on rainfall amount in Ethiopia: A Case study in Western Amhara National Regional State

Article scientifique 2022 Anglais

Résumé

Abstract Agricultural production in Ethiopia is predominantly rainfed. Variation in rainfall and El Niño Southern Oscillation (ENSO) affects the agricultural production system in the country. This needs a close study ontrends, variability of rainfall, and impacts of El Niño Southern Oscillation (ENSO) on rainfall amount to suggest possible adaptation strategies. The study was in Western Amhara of Ethiopia. Monthly rainfall data were collected from fifteen meteorological stations of Western Amhara and selected El Niño and La Niña years from National Oceanic and Atmospheric Administration (NOAA) from 1986 to 2015.Following data quality checking and inspection, the monthly rainfall data of the selected stations were arranged in Microsoft Excel Spread Sheet and analyzed using XLSTAT software. Coefficient of variation and the Mann Kendall non-parametric statistical test was applied to study trends and variability of rainfall and temperature in Western Amhara.Thelong-term recorded annual rainfall data indicated that there was an increasing trend from 1986 to 2015, but not significant. The rainfall variability was less (CV = 8.6%); also, the mean monthly rainfall of Western Amhara decreased during El Niño years and increased during La Niña years especially in the rainy season (JJAS) over30 years.

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Amare, Z., Geremew, B., Kebede, N., Amera, S. (2022). Climate Trends, variability, and impacts of ENSO on rainfall amount in Ethiopia: A Case study in Western Amhara National Regional State. https://doi.org/10.21203/rs.3.rs-2078316/v1

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Auteur(s)

Zerihun Yohannes Amare Belayneh Birku Geremew Nigatu Kebede Sisaynew Getahun Amera

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