Climate change models (B, C1–3) predict that the flow of dense shelf water (DSW) into the deep sea (A) will decrease in the next 100 years. (A: Courtesy of GRC Marine Geosciences-University of Barcelona, CEFREM-CNRS/University of Perpignan, and ICM Barcelona-CSIC; B,C: Based on Somot et al, 2006.)