Schematic of two glacial climate states: a stable "cold" mode (bottom) and an unstable "warm" mode (top). Surface ocean currents are shown in red and deep currents in light blue. In a global climate model, abrupt ice-age warming events are triggered by small changes in the salinity of the northern North Atlantic, causing a temporary transition from the cold to the warm mode.
From the article:
Abrupt Glacial Climate Changes due to Stochastic ResonanceAndrey Ganopolski and Stefan Rahmstorf
Phys. Rev. Lett. 88, 038501 (2002)
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