Physical Oceanography Department
Woods Hole Oceanographic Institution
Woods Hole, MA
On Decadal Variability of the Ocean Gyres
Intrinsic low-frequency variability is studied in the idealized, quasigeostrophic, midlatitude, wind-driven ocean gyres operating at large Reynolds number. A robust decadal variability mode driven by the transient mesoscale eddies is found and analyzed. The variability is a turbulent phenomenon, which is driven by the competition between the eddy rectification process and the potential-vorticity anomalies induced by changes of the inter-gyre transport.