Analyzing seafloor sediments from the Bermuda Rise, scientists concluded that alkenones made off Nova Scotia were transported southward by the Deep Western Boundary Current. Off Cape Hatteras, the current intercepts the clockwise-circulating Worthington Gyre and the counterclockwise North Recirculating Gyre. The two great gyres act like interlocking cogs, drawing Nova Scotian particles from the Deep Western Boundary Current, channeling them eastward between the gyres, and carrying them onto the Bermuda Rise. (Illustration by E. Paul Oberlander, Woods Hole Oceanographic Institution)[back]
|
