PGL DF: The model is run to equilibrium using restoring boundary condition for the surface temperature. Then, the surface heat flux field is diagnosed and kept fixed from then on. The model state diverges through a linear instability, but the amplitude of the interdecadal oscillations settles within a few hundred yeards. Time averaged temperature field at 75 m (upper) and 1700 m (lower) deep. The color scale on the left is in degree C.

PGL DF MEAN TEMPERATURE

Evolution of the temperature anomaly field at 75 m (upper) and 1700 m (lower) deep. The color scale on the left is in degree C.

PGL DF TEMPERATURE ANOMALY