2019年11月7日 · Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.

2024年11月14日 · The hadal zone occurs only in trenches, which can extend to 11,000 meters deep (36,000 feet). Hadal regions combined across all oceans make up an area about the size of Australia. The region extending from 6,000 to 11,000 meters is called the hadal, or hadalpelagic, zone after Hades, the Greek god of the underworld.

The ocean water column is made up of five zones: the sunlight zone (epipelagic), the twilight zone (mesopelagic), the midnight zone (bathypelagic), the abyssal zone (abyssopelagic) and the hadal zone (trenches).

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2014年4月10日 · Hydrostatic pressure, which at depths found in ocean trenches can be up to 1,100 times that at the surface, is known to inhibit the activity of certain proteins. Paul Yancey from Whitman College will be investigating the role that piezolytes—small molecules that protect proteins from pressure— play in the adaptation of trench animals.

2021年2月25日 · Earth’s vast oceans run deep, bottoming out around 4,000 meters (13,123 feet) in most places, although trenches can form underwater canyons extending another 7,000 meters (22,965 feet). The seafloor and water column from 3,000 to 6,500 meters (9,842 to 21,325 feet) depth is known as the abyssal zone, or the abyss.

2024年12月9日 · The trench stretches along the eastern South Pacific Ocean, plunging to depths exceeding 8,000 meters off the coast of northern Chile, and has long fascinated scientists. Located beneath nutrient-rich and productive surface waters and geographically remote from other hadal environments, the Atacama Trench hosts a distinctive community of native ...

Ocean water is normally slightly basic, with a surface-water pH of about 8.2, but that has declined in recent years to about 8.1. A decrease of 0.1 pH units may not seem like much, but because the pH scale is logarithmic, each unit on the pH scale represents a tenfold change in acidity.

2020年11月10日 · The mid-ocean ridge is a continuous range of undersea volcanic mountains that encircles the globe almost entirely underwater. It is a central feature of seafloor terrain that is more varied and more spectacular than almost anything found on dry land, and includes a collection of volcanic ridges, rifts, fault zones, and other geologic features.

Know Your Ocean: Seafloor and below. Ocean trenches are steep depressions several miles deep, where old ocean crust from one tectonic plate is pushed beneath another. Learn more about trenches, hydrothermal vents, seafloor volcanoes, and more!