qThis hypothesis argues that millennial oscillations were produced by the internal interactions among various components of the climate system.
qOne most likely internal interaction is the one associated with the deep-water formation in the North Atlantic.
qMillennial oscillations can be produced from changes in northward flow of warm, salty surface water along the conveyor belt.
qStronger conveyor flow releases heat that melts ice and lowers the salinity of the North Atlantic, eventually slowing or stopping the formation of deep water.
qWeaker flow then causes salinity to rise, completing the cycle.