Seasonal variation of the alongshore velocity field ovei the continental shelf off Oregon1

Abstract

The seasonal variation in the alongshore velocity field is inferred from direct current observations made over the Oregon continental shelf at various locations and irregular intervals since 1965. Monthly mean currents are computed and compared with earlier studies to give a description of the seasonal variation in the alongshore currents. In winter, the alongshore flow is generally northward and independent of depth. In spring, flow is southward at all depths but stronger near the surface. In summer, surface flow is southward and deep flow is northward; the southward surface flow forms a coastal jet and the deep northward velocity increases with distance offshore.