Atlantic Ocean as the mid-19th century. During the Age of Discovery, the Atlantic was also known to English cartographers as the Great Western Ocean. The International Hydrographic Organization (IHO) defined the limits of the oceans and seas in 1953, but some of these definitions have been revised since then and some are not used by various authorities, institutions, and countries, see for example the CIA World Factbook. Correspondingly, the extent and number of oceans and seas varies. The Atlantic Ocean is bounded on the west by North and South America. It connects to the Arctic Ocean through the Denmark Strait, Greenland Sea,
Nordic Seas body of water does not make up the deep waters of the Nordic Sea. The circulation of the Nordic Seas is cyclonic. The circulation pattern is seen in Figure 2. The Nordic Seas exchange water with the North Atlantic in the upper ocean. Warm water from the North Atlantic enters the Nordic Seas from the east, specifically in the Norwegian Atlantic Current (part of the North Atlantic Current). The western boundary of the Nordic Seas is the southward-flowing East Greenland Current. This current enters through the Fram Straight from the Arctic. This current is considered one of the main ways