Abstract

Abstract Using the equation of continuity, vertical velocity profiles were calculated from horizontal current measuurements in the Oregon coastal upwelling system. A vertical velocity of 2 × 10 −2 cm s −1 was characteristic during a period of upwelling-favorable winds 11 km offshore in 100 m of water. During the following calm period, ascending motions persisted in the upper part of the water column, but downslope flow along the bottom contributed to strong negative velocities in the lower part of the water column. It is suggested that relaxation of upwelling is relatively slow with the most rapid response occurring near the bottom.

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