Projected Drought Intensification in the Büyük Menderes Basin Under CMIP6 Climate Scenarios
2025
Farzad Rotbeei | Mustafa Nuri Balov | Mir Jafar Sadegh Safari | Babak Vaheddoost
The amplitude and interval of drought events are expected to enhance in upcoming years resulting from global warming and climate alterations. Understanding future drought events&rsquo: potential impacts is important for effective regional adaptation and mitigation approaches. The main goal of this research is to study the impacts of climate change on drought in the Bü:yü:k Menderes Basin located in the Aegean region of western Tü:rkiye by using the outcomes of three general circulation models (GCMs) from CMIP6 considering two different emission scenarios (SSP2-4.5 and SSP5-8.5). Following a bias correction using a linear scaling method, daily precipitation and temperature projections are used to compute the Standardized Precipitation Evapotranspiration Index (SPEI). The effectiveness of the GCMs in projecting precipitation and temperature is evaluated using observational data from the reference period (1985&ndash:2014). Future drought conditions are then assessed based on drought indices for three periods: 2015&ndash:2040 (near future), 2041&ndash:2070 (mid-term future), and 2071&ndash:2100 (late future). Consequently, the number of dry months is projected and expected to elevate, informed by SSP2-4.5 and SSP5-8.5 scenarios, during the late-century timeframe (2071&ndash:2100) in comparison to the baseline period (1985&ndash:2014). The findings of this study offer an important understanding for crafting adaptation strategies aimed at reducing future drought impacts in the Bü:yü:k Menderes Basin in the face of changing climate conditions.
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