(2021) have found an increasing trend in extreme precipitation indices over the south and southwest regions whereas a significant decreasing trend was observed in the southeastern parts of Ethiopia for seasonal precipitation extreme indices.
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Spatiotemporal trends in mean and extreme climate variables over 1981-2020 in Meki watershed of central rift valley basin, Ethiopia.
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Table 4 shows a significant increasing trend in the observed mean annual maximum temperature for Butajira, Bui, and Wulbareg stations whereas a negative trend was detected for annual mean minimum temperature in Butajira, Bui, and Wulbareg but significant at only Butajira.
The result indicates that the annual precipitation has been decreasing in 71% of climatic stations and 43% of these stations showed a significant trend.
The summer ( kiremt ) season rainfall exhibited a non-significant negative trend in 57% of the climatic stations while a positive trend was observed in Bui, Butajira and Ejersalele, but the trend was significant only at Ejersalele ( Figure 4 b).