Figure 9.8 A three-dimensional view of the Langmuir circulation at the surface of the Pacific observed from the Floating Instrument Platform FLIP. The heavy dashed line on the sea surface indicate lines of convergence marked by cards on the surface. Vertical arrows are individual values of vertical velocity measured every 14 seconds at 23m depth as the platform drifted through the Langmuir currents. Horizontal arrows, which are drawn on the surface for clarity, are values of horizontal velocity at 23m. The broad arrow gives the direction of the wind. From Weller et al. (1985).