Fig. 5: Current velocity and oxygen changes.
From: North Atlantic temperature control on deoxygenation in the northern tropical Pacific
Time series of A the gradient in Equatorial Under Current (EUC) maximum velocity between the western (120° E–150° W) and eastern (150°–100° W) equatorial Pacific, B EUC annual zonal maximum velocity (eastward) within 150°–90° W; 2° S–2° N and between 90 and 300 m below the surface from 1950 to 2010 (SODA data reanalyses as in Fig. 4), AMO (C) and PDO (D) indices (as in Fig. 1) and E oxygen anomalies in the Eastern Tropical North Pacific (ETNP) based on the CalCOFI dataset34. Redish colour means more oxygen is present in the subsurface. During negative AMO phase (blue), stronger EUC and decreased equatorial biological productivity result in increased oxygen supply to the ETNP. During negative PDO phases (blue), upwelling strength increases in the ETNP resulting in increased oxidant demand and diapycnal mixing.
