13 September 1974
Vol 185, Issue 4155

About The Cover

Strait of Gibraltar where warm, salty Mediterranean water spills across a sill, intrudes into the cooler, fresher Atlantic water, and spreads west at a depth of 1200 meters. Sinking of salt from this waqrm core to the fresher water below occurs by a convective process called salt fingering. The rain catchment on Gibraltar is a reminder that water is separated from salt by solar energy but in the steady state must mix again as beneath the mediterranean ouotflow. See page 941. [U.S. Navy]