Evolution of Mediterranean extreme dry spells during the wet season under climate change
2019
Dry
spellsare
natural hazardswhich have strong impacts on the environment and on many socioeconomic sectors. Their evolution in the
Mediterranean Basinis a major issue because it is one of the most extreme hot spots of climate change world-wide. Very long dry
spellsare defined as climatic events characterized by their location, spatial extent, duration, and recurrence. This study investigates the evolution of these events during the
wet seasonand for regional future climate projections of the Mediterranean and European Coordinated
DownscalingExperiment initiatives (called Med-CORDEX and EURO-CORDEX). All simulations were performed with different regional climate models and various
climate change scenarios. Main results are (i) an increase in the number of very long dry
spells(between + 3 and + 31 events) and (ii) an increase of their mean duration and spatial extent. This increase in the severity of very long dry
spellsmay have strong socioeconomic impacts in particular for the most vulnerable areas.
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