Abstract

Measurements of the vertical distribution of 222Rn in the Bomex area yield a number of important pieces of oceanographic information. They yield a gas exchange piston velocity of 700 m/yr (equivalent to a stagnant boundary layer thickness of 60 μ). They allow a limit of greater than 160 cm 2/sec to be placed on the coefficient of vertical eddy diffusion in the 0 to 20 m depth zone and of less than 4 cm 2/sec in the 30 to 40 m depth zone. They also provide a vertical profile of the 226Ra concentration in sea water.

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