He received the Prize for «development of experimental techniques to probe the upper ocean boundary layer.» (tcaoasa.org)
The higher sea level near the western ocean boundary creates a west - east pressure difference in the ocean, that results in the equatorial undercurrent flowing from west to east below the surface. (realclimate.org)
His Medwin Prize Lecture (Vancouver Meeting) was titled «Acoustic explorations of the upper ocean boundary layer.» (tcaoasa.org)