Coastline: 111,866 km
Climate: tropical cyclones (hurricanes) develop off the coast of
Africa near Cape Verde and move westward into the Caribbean Sea;
hurricanes can occur from May to December, but are most frequent from
August to November
Terrain: surface usually covered with sea ice in Labrador Sea, Denmark Strait, and Baltic Sea from October to June; clockwise warm-water gyre (broad, circular system of currents) in the northern Atlantic, counterclockwise warm-water gyre in the southern Atlantic; the ocean floor is dominated by the Mid-Atlantic Ridge, a rugged north-south centerline for the entire Atlantic basin
Elevation extremes: lowest point: Milwaukee Deep in the Puerto Rico Trench -8,605 m highest point: sea level 0 m
Natural resources: oil and gas fields, fish, marine mammals (seals and whales), sand and gravel aggregates, placer deposits, polymetallic nodules, precious stones
Natural hazards: icebergs common in Davis Strait, Denmark Strait, and the northwestern Atlantic Ocean from February to August and have been spotted as far south as Bermuda and the Madeira Islands; ships subject to superstructure icing in extreme northern Atlantic from October to May; persistent fog can be a maritime hazard from May to September; hurricanes (May to December)
Environment - current issues: endangered marine species include the manatee, seals, sea lions, turtles, and whales; drift net fishing is hastening the decline of fish stocks and contributing to international disputes; municipal sludge pollution off eastern US, southern Brazil, and eastern Argentina; oil pollution in Caribbean Sea, Gulf of Mexico, Lake Maracaibo, Mediterranean Sea, and North Sea; industrial waste and municipal sewage pollution in Baltic Sea, North Sea, and Mediterranean Sea
Geography - note: major chokepoints include the Dardanelles, Strait of
Gibraltar, access to the Panama and Suez Canals; strategic straits
include the Strait of Dover, Straits of Florida, Mona Passage, The
Sound (Oresund), and Windward Passage; the Equator divides the
Atlantic Ocean into the North Atlantic Ocean and South Atlantic Ocean
@Atlantic Ocean:Government
Data code: none; the US Government has not approved a standard for hydrographic codes - see the Cross-Reference List of Hydrographic Data Codes appendix