||Downwardly-directed current, resulting from either the convergence of water masses
or from the convergence of a water mass with a coastline. At this convergence, gravity
will force water into a downwelling, which will carry surface water to greater depths.
In the nearshore, the circulation will take the water to the shallow bottom and then
move seaward. In deeper waters, the downwelling will carry water to a depth determined
by energy dissipation and relative density considerations; the maximum downwelling
depth can be into the abyssalpelagic zone.