Figure 2: The AC fields in the core layer of STMW.
From: Observing mesoscale eddy effects on mode-water subduction and transport in the North Pacific
Observed raw data dots are displayed in the top three rows: (a–c) mixed layer depth (MLD; m), (d–f) AOU (ml kg−1) and (g–i) PV (10−10m−1s−1) on the core layer of STMW (25.3σθ). A coordinate system (Δx, Δy) is used relative to the AC centre (the red line in Fig. 1a or the black line in Fig. 1b). The outer boundary of the eddy core, defined as the zero relative vorticity contour, is normalized here as between [−1 1]. Arrows denote geostrophic currents in m s−1. The bottom left plot (j) denotes the zonally averaged (135°–150°E) PV on the core layer of STMW (25.3σθ) as a function of latitude based on the Roemmich–Gilson Argo climatology: the solid blue line for March–April, dotted green line for May–June and dash red line for July–August. The latitude of AC is marked in black * in j. (k–l) Data dots of PV (colour shading) and geostrophic current (vectors) for March to April, sampled by synthetic Argo profiles deployed in OFES to mimic the sampling of the field campaign (Methods); (k) one AC in OFES and (l) 14 ACs in OFES. The slanted straight black lines in g,l are the positions of the transections in Figs 3 and 4.
