2025 INTERNATIONAL JOURNAL OF GLOBAL WARMING 2025 37(卷), 4(期), (null页)
This paper aims to detect trends in annual and seasonal mean temperature and rainfall to highlight the impact of climate change in the sub-arid area of Algeria. Here, observed precipitation and temperature data collected from five weather stations over the period of 1990-2020 in the Constantine highlands watershed (Northeastern Algeria) were analysed, employing the non-parametric Mann-Kendall statistical test for this analysis. The results indicate an upward trend, particularly during summer, which has been statistically significant for all stations except Setif and Banta, which have shown a negative trend for seasonal periods. Conversely, the annual and summer rainfall exhibited a negative trend at 5%. This confirms a clear warming trend in the region, especially in summer, which could have significant impacts on water resources, agriculture, and ecosystem stability. Understanding these trends is vital for developing effective adaptation and mitigation strategies in response to the changing climate in this vulnerable area.