Who is the deepest ocean in the world

It has become a primary route for migrants. In , it was assumed that more than one million migrants used this route to migrate to Europe. In the Mediterranean Sea, pollution is the main concern caused by sewage, mercury, lead, phosphate, mineral oil, and marine debris. Due to evaporation and narrow connection, its water is a little bit saltier than the Atlantic Ocean.

The Mediterranean sea leads the list of the deepest oceans on the earth, with an average depth of 4, meters. It covers , square miles area. At one point, this sea was so shallow that people could roam from Asia to North America. It is considered to have happened at the last ice age. During this time, animals migrate in both directions from one continent to another. North Pacific Right whale, the rarest whale, also exists here along with sperm whale, beluga whale, blue whale, fin whale, sei whale, gray whale, humpback whale, and bowhead whale.

More than distinct fish species have been recorded to be lived in the Bering Sea. The Bering Sea leads the list of the deepest oceans on the earth, with an average depth of 4, meters. It covers 1,, square miles area. In the South China Sea, fisheries are a large industry. If China manages all of the South China Sea, it will restrict the capability of foreign nations to move forces via the water. There has been news of fishermen using dynamite and poison to grab fish in the Spratly Islands of this sea, causing widespread damage to ecosystems.

The South China Sea leads the list of deepest oceans on the earth, with an average depth of 5, meters. The Arctic Ocean is situated in the northern hemisphere north of 60 degrees north latitude and adjoins the Eurasian and North American continents and encircles Greenland and various islands.

In winter, the Arctic Ocean is mostly blanketed with snow and is partially coated by snow over the year. In , Fridtjof Nansen was the first person who cross the ocean by boat. The Arctic Ocean is around the similar size to Russia which comprises 5,, square miles area. The extreme depths of the oceans and seas result from subduction , where one of the two colliding tectonic plates descends into the Earth's mantle.

Oceans alone cover about However, not all five oceans have equal depths. As the Pacific Plate descends into the mantle, it is heated by friction and the geothermal gradient.

At a depth of approximately miles, the rocks have been heated to a point where some minerals begin to melt. This melting produces magma that rises towards the surface because of its lower density. As the magma reaches the surface, volcanic eruptions are produced. These eruptions have formed the Mariana Island archipelago. Find Other Topics on Geology. Maps Volcanoes World Maps.

Tallest Mountain. Largest Tsunami. Deepest Lake in the World. Angel Falls. The Most Explosive Eruption. Largest Meteorite. But within that was an area the size of Finland that was totally new, where the seafloor had never been seen before," explained team-member Dr Heather Stewart from the British Geological Survey. All of this information is being handed over to the Nippon Foundation-GEBCO Seabed Project , which aims to compile, from various data sources, a full-ocean depth map by the end of the decade.

It would be a critical resource. Better seafloor maps are needed for a host of reasons. They are essential for navigation, of course, and for laying underwater cables and pipelines. They are also important for fisheries management and conservation, because it is around the underwater mountains that wildlife tends to congregate.

Each seamount is a biodiversity hotspot. In addition, the rugged seafloor influences the behaviour of ocean currents and the vertical mixing of water.

This is information required to improve the models that forecast future climate change - because it is the oceans that play a pivotal role in moving heat around the planet. And if you want to understand precisely how sea-levels will rise in different parts of the world, good ocean-floor maps are a must.

Team-member and co-author on the new paper, Prof Alan Jamieson, is still aboard. He said the research ship was making discoveries every time it sent instrumentation into the deep.