What kind of flow is important in driving the ocean surface currents?

a. Wave frequency
b. West Wind Drift
c. Progressive waves
d. Stokes drift


ANS: D
Stokes drift occurs if the particle speed decreases with depth. The movement in the top half of an orbit
moves farther forward in the direction of the wave. Any molecules in the bottom half of the orbit move
backwards. Information can be found in the section Waves Move Energy Across the Sea Surface.

Environmental & Atmospheric Sciences

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