The ocean is a large area of salt-water form the basic components of the hydrosphere. Approximately 71% of Earth's surface (about 361 million square kilometers) is covered oceans, a body of water continually practice is divided into several key ocean and some small signs. Over half of this area has a depth of 3,000 meters (9,800 ft). The average salinity of the ocean is about
35 per thousand (ppt) (3.5%) and almost every kind of sea water salinity ranged from 30 (in the very near) to 38 ppt (tropical / subtropical). Surface water temperature off the coast is 29 ° C (84 ° F) in coastal areas, the equator down to 0 ° C (32 ° F) in the polar regions.
35 per thousand (ppt) (3.5%) and almost every kind of sea water salinity ranged from 30 (in the very near) to 38 ppt (tropical / subtropical). Surface water temperature off the coast is 29 ° C (84 ° F) in coastal areas, the equator down to 0 ° C (32 ° F) in the polar regions.
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