Ocean Trenches - Woods Hole Oceanographic Institution Ocean trenches are steep depressions exceeding 6,000 meters in depth, where old ocean crust from one tectonic plate is pushed beneath another plate Trenches make up the world's hadal zone
Hadal Zone - Woods Hole Oceanographic Institution 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
Ocean Trenches – Woods Hole Oceanographic Institution Woods Hole Oceanographic Institution is the world's leading non-profit oceanographic research organization Our mission is to explore and understand the ocean and to educate scientists, students, decision-makers, and the public
Abyssal Zone - Woods Hole Oceanographic Institution What is the abyssal zone? 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 Sunlight doesn’t penetrate to these depths, so the
Ocean Zones - Woods Hole Oceanographic Institution The ocean water column is made up of five zones: the sunlight (epipelagic), twilight (mesopelagic), midnight (bathypelagic), abyssal (abyssopelagic) and hadal zones (trenches)
Mid-ocean Ridges - Woods Hole Oceanographic Institution What are mid-ocean ridges? Mid-ocean ridges form the longest mountain range in the world, nearly all of which lies beneath the sea These ridges crisscross the world’s oceans like stitches on a baseball; together they measure nearly 65,000 kilometers (about 40,000 miles) in length Most of Earth’s volcanic activity occurs along mid-ocean ridges, which form along the seams between tectonic
Seafloor Below - Woods Hole Oceanographic Institution In contrast, ocean trenches occur areas where tectonic plates collide, driving one plate deep beneath another in dramatic, deep-sea subduction zones Seamounts — underwater mountains that rise from the seafloor — are often biological hotspots that provide habitat for marine life
Scientific Mission Will Explore One of the Deepest Ocean Trenches An international team of researchers led by deep-sea biologist Tim Shank of the Woods Hole Oceanographic Institution (WHOI) will use the world's only full-ocean depth, hybrid remotely operated vehicle, Nereus, and other advanced technology to explore life in the depths of the Kermadec Trench
How the Ocean Works - Woods Hole Oceanographic Institution Understanding how the ocean works is foundational to understanding life on this planet and to the discipline of oceanography Get to know the big systems of the ocean: its cycles, circulation, zones, and connection to the atmosphere Learn about ocean chemistry, life and landscapes on the seafloor, plate movements, shorelines, and icy regions
Why is pressure different in the ocean? - Woods Hole Oceanographic . . . In the deepest trenches, it's 1,100 times greater! All that pressure causes serious problems for people and other air-breathing animals Our lungs fill with air, and we have air-filled spaces in our heads Too much pressure would collapse those spaces, crushing us Animals adapted to deep-ocean life don't have air pockets in their bodies