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The deep sea is broadly defined as the ocean depth where light begins to fade, at an approximate depth of 200 m (660 ft) or the point of transition from continental shelves to continental slopes. [ 1 ] [ 2 ] Conditions within the deep sea are a combination of low temperatures, darkness, and high pressure . [ 3 ]
Sonar mapping of the Challenger Deep by the DSSV Pressure Drop employing a Kongsberg SIMRAD EM124 multibeam echosounder system (26 April – 4 May 2019). The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor.
This is a helicopter. It is used to soar above the sea and watch the animals hop in and out of the water. Dragonfly: The Poison Dart Frogs (Series 4, episode 1) and The Caves of Sac Actun (10th special). GUP-I: This is a polar exploration station and rugged vehicle. Water bear: Operation Deep Freeze (8th special). GUP-J
The environmental impact of deep sea mining is controversial. [39] [40] Environmental advocacy groups such as Greenpeace and the Deep Sea Mining Campaign [41] claimed that seabed mining has the potential to damage deep sea ecosystems and spread pollution from heavy metal-laden plumes. [42] Critics have called for moratoria [43] [44] or ...
An ocean is a body of water that composes much of a planet's hydrosphere. [1] On Earth, an ocean is one of the major conventional divisions of the World Ocean. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic Oceans. [2] [3] The word "ocean" is often used interchangeably with "sea" in ...
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An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 meters (9,800 ft) and 6,000 meters (20,000 ft).Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains are among the flattest, smoothest and least explored regions on Earth. [1]
The deepest point of the trench is more than 2 km (1.2 mi) farther from sea level than the peak of Mount Everest. [a] At the bottom of the trench, the water column above exerts a pressure of 1,086 bar (15,750 psi), more than 1,071 times the standard atmospheric pressure at sea level. At this pressure, the density of water is increased by 4.96%.