Somali Current 15 m/s) of the Southwest monsoon affecting the Somali Current induce intense vertical mixing, increasing the thickness of the mixed layer as well as overall surface nutrient enrichment leading to high productivity. After this season, with the onset of the Northeast (Winter) Monsoon, primary productivity decreases, though zooplankton density does so only slightly. Somali Current The Somali Current is an ocean boundary current that runs along the coast of Somalia and Oman in the Western Indian Ocean and is analogous to the Gulf Stream in the Atlantic Ocean. This current is heavily influenced by the monsoons and is the only
Atlantic Ocean South America, and north-eastern Europe. In the western Atlantic carbonate platforms dominate large areas, for example the Blake Plateau and Bermuda Rise. The Atlantic is surrounded by passive margins except at a few locations where active margins form deep trenches: the Puerto Rico Trench ( maximum depth) in the western Pacific and South Sandwich Trench () in the South Atlantic. There are numerous submarine canyons off north-eastern North America, western Europe, and north-western Africa. Some of these canyons extend along the continental rises and farther into the abyssal plains as deep-sea channels. In 1922 a historic moment in cartography and