Figure 6

Time-vertical section of eastward component of (a) horizontal current, (b) low-passed (24 h) vertical shear, (c) near-inertial band-passed (0.9–1.1f) current and (d) its magnitude. In (e), the vertical integral of NIKE is shown for depths of 50–300 m (red), 300–1200 m (blue) and the total (black). In (f), the contributions from the first five vertical modes are shown by shaded areas, with the total amount accumulating from \(n\) = 1 to 20 by bold blue curve, while the raw NIKE by bold black curve. Note that in (c–e) velocities are WKB-scaled (see “Data and methods” for more details).