An ocean (from ancient greek ὠκεανός, transc okeanós) is a body of saline water that composes much of a planet's hydrosphere on earth, an ocean is one of the major conventional divisions of the world oceanthese are, in descending order by area, the pacific, atlantic, indian, southern (antarctic), and arctic oceans the word ocean is often used interchangeably with sea in. Although incorrect in much of the science, maury's flowing prose leads to popular interest in the oceans and the science of the sea 1857 - james alden, commanding officer of the coast survey steamer active, discovers a deep submarine valley, or gulch, in the center of monterey bay. Mariners then referred to the seven seas as the arctic ocean, the atlantic ocean, the indian ocean, the pacific ocean, the mediterranean sea, the caribbean sea, and the gulf of mexicoother. Salinity & the water cycle understanding why the sea is salty begins with knowing how water cycles among the ocean's physical states: liquid, vapor, and ice.
Origin of the oceans k k turekian, yale university, new haven, ct, usa constituents of sea water by degassing from the earth’s interior in 1951 ww rubey, in his presidential address to the geological society of america, took the latter history the contemporary oceans and ocean-de. Deep-sea mining plans need a better grasp of ocean floor ecosystems 20 october 2017 according to a scientific meeting at the museum this week, mining the deep ocean for minerals could cause wide-ranging, decades-long disturbances to the seafloor's diverse ecosystems. The atlantic ocean is the second largest of the world's oceans, with an area of about 106,460,000 square kilometers (41,100,000 square miles)   it covers approximately 20 percent of the earth's surface and about 29 percent of its water surface area.
A sea is a large body of salt water that is surrounded in whole or in part by land more broadly, the sea is the interconnected system of earth's salty, oceanic waters—considered as one global ocean or as several principal oceanic divisionsthe sea moderates earth's climate and has important roles in the water cycle, carbon cycle, and nitrogen cycle. Southern ocean, also called antarctic ocean, the southern portions of the pacific, atlantic, and indian oceans and their tributary seas surrounding antarcticaunbroken by any other continental landmass, the southern ocean’s narrowest constriction is the drake passage, 600 miles (about 1,000 km) wide, between south america and the tip of the antarctic peninsula. Orbiting spacecrafts make highly accurate measurements of the height of the ocean surface - commonly called 'sea level' - to gather long-term information about the world's ocean and its currents. Salinity defines the relative proportions of seawater and freshwater found in different parts of the estuary areas close to the oceans have higher salinity, while areas that are closest to river inputs have lower salinity. 11-15 interesting facts about seas and oceans 11 aral sea, once the fourth largest lake in the world, is now just 10% of its original size after soviet engineers diverted water from its feeder rivers to cotton crops in the desert and is considered one of the worst environmental disasters in historysource.
Mountains: the ocean ridges form a great mountain range, almost 40,000 miles (64,000 km) long, that weaves its way through all the major oceans it is the largest single feature on earth it is the largest single feature on earth. Origin of the ocean waters the huge volume of water contained in the oceans (and seas), 137 × 10 7 cubic km (about 33 × 10 7 cubic miles), has been produced during earth’s geologic history there is little information on the early history of earth’s waters. The arctic ocean and the southern ocean (the ocean around antarctica) have different characteristics than the rest of the world's oceans in terms of circulation, formation of bottom water, convergent and divergent water masses, productivity, ice cover, and biological diversity. Unesco – eolss sample chapters extremophiles – vol iii - characteristics of deep-sea environments and biodiversity of piezophilic organisms - kato, chiaki, horikoshi, koki ©encyclopedia of life support systems (eolss) 3 taxonomic identification of piezophilic bacteria 31. In the 1980s, the sea walnut (mnemiopsis leidyi), a type of comb jelly, was brought to the black sea in ship ballast water it reproduced and spread quickly, gobbling up zooplankton and leaving little behind for the larvae of commercial fish species, including anchovy, scad and sprat.
They travel with ocean currents until they wash up on a beach somewhere, perhaps thousands of miles from their origin sea-beans are quite hard and buoyant, which helps them survive their long-distance voyage. 1,491,000 square miles (3,861,672 square kilometers) located between the indian and arabian peninsulas in the northwestern section of the indian ocean is the arabian sea. Okeanos (oceanus) was equated with pontos (pontus, the sea) by late classical writers the association occurred after greek explorers reached the atlantic and indian oceans, to discover a salty, rather than fresh-water, sea. Physical characteristics of the ocean 3 adapted from activities in investigating the marine environment and it’s resources by violetta lien. The sargasso sea, located entirely within the atlantic ocean, is the only sea without a land boundary mats of free-floating sargassum, a common seaweed found in the sargasso sea, provide shelter and habitat to many animals.
Seawater is water from a sea or ocean on average, seawater in the world's oceans has a salinity of approximately 35%, or 35 parts per thousand this means that for every 1 litre (1000 ml) of. Characteristics the temperature of the waters of the deep sea varies from 4°c to -1°c exceptions are the mediterranean sea with an average temperature of 13°c in the upper 4,000 metres and the red sea where the bottom water can reach temperatures up to 215°c at depths of 2,000 metres. A sea is a large body of water that is smaller than an oceanthe sea, the sea is a tale of the strange obsessions that haunt a self-satisfied go science math history literature technology health.
Seawater is a mixture of various salts and water most of the water in the ocean basins is believed to originate from the condensation of water found in the early atmosphere as the earth cooled after its formation this water was released from the lithosphere as the earth's crust solidified. General characteristics of the world's oceans: 4 ocean currents the ocean's surface is not level this is due in part to currents, waves, atmospheric pressure differences, and variations in gravity. The deep sea is by far the largest habitat for life on earth but it is quite unknown at 1000m below the surface of the ocean the pressure increases to 100 times that of the surface.