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HyMeX - from the science plan to the implementation plan

In recent years, an international project Hydrological cycle in Mediterranean Experiment (HyMeX) was launched to achieve a better general understanding of natural water cycle and improve hydrometeorological forecasts. Reasons for launching the Hymex project lie in the fact that the Mediterranean is one of hot spots for regional climate change. The Mediterranean area also concentrates the major natural risks related to the water cycle, including heavy precipitation and flash-flooding during the fall season, severe cyclogenesis associated with strong winds and large sea waves during winter, and heat waves and droughts accompanied by forest fires during summer. The Hymex project has focused on conducting both special observation periods (SOPs) and long-term observation periods (LOPs). An important goal of the project is also to advance state-of-the-art numerical models within a coupled atmosphere – sea – land modelling system across all weather and climate scales. Therefore, the project aims to improve the capability of predicting high-impact weather events, which remains moderate due to contribution of very fine-scale processes and their non-linear interactions with the larger-scale processes. On climate scales, in addition to temperature increase, a large decrease in the mean precipitation and an increase in precipitation variability are expected during dry (warm) season in future. Due to comparable amplitudes of climate change and internal climate variability, assessing regional climate evolution in the Mediterranean still remains a principal challenge.

HyMeX; hidrological cycle; extreme events; floods; drought

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