This deep water eventually upwells in the Indian and Pacific Oceans and returns to the North Atlantic around the Horn of Africa and the tip of South America. This is a cooperative program between Russian, Canadian, and US scientists and addresses the variability of the circulation in the subpolar and northern subtropical gyres of the North Pacific. It is a WOCE section in the western Indian Ocean from Mauritius northward through the Arabian Sea and the Persian Gulf to Oman. The meridional circulation in the Arabian Sea is analogous to the N. Pacific in that deep waters come in from the Southern Ocean and slowly upwell and return southward as warmer water. The Indian Ocean is very interesting since it is broken into basins by a number of ridges.
Deep waters moving northward can only pass through the gaps in the ridges into other basins.
On I7N, we crossed the Amirante Pass just south of the Seychelles, where water from the deep Mascarene Basin flows into the Somali Basin. 2 May. Direct web site comments to Dave Partee , web coordinator.