Variability of the Mediterranean Sea circulation under contrasting extreme climatic conditions
Abstract
This thesis investigates the sensitivity of the thermohaline circulation and the inherent variability of the Mediterranean Sea under contrasting climatic conditions. Three long term numerical simulation experiments were performed under climatic conditions similar to: a) the current climatology, b) the cold and dry conditions resembling the Younger Dryas event, and c) the wet and warm climatic conditions resembling the S1a sapropel deposition interval. A perpetual climatological year forcing was applied in each experiment, to isolate the internal variability of the system from the atmospheric variability. After the initial spin-up, each experiment was forced by self-diagnosed heat and salt fluxes for a millennium – long, relaxation-free run. The results revealed that the Mediterranean Sea circulation is particularly sensitive to climate change: in colder and drier conditions (Younger Dryas – like conditions) the Mediterranean functions as a concentration basin and exports dense water to ...
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