Sentences with phrase «ocean seafloor»

Nearly four years ago, geological surveys of the Arctic Ocean seafloor revealed the presence of shells buried deep in its sediment.

At the same time, Russia is laying claim to much of the Arctic Ocean seafloor, right up to the North Pole,» Zukunft said.

A section of the Arctic Ocean seafloor that holds vast stores of frozen methane is showing signs of instability and widespread venting of the powerful greenhouse gas, according to the findings of an international research team led by University of Alaska Fairbanks scientists Natalia Shakhova and Igor Semiletov.

Dr. Titov, a mathematician who works for a government marine laboratory, began to assemble his digital tools on his computer's hard drive: a three - dimensional map of the Indian Ocean seafloor and the seismic data showing the force, breadth and direction of the earthquake's punch to the sea.

• The methanetrack.org website has shown significant increases in atmospheric methane concentrations over Antarctica this austral winter (which I believe are due to increases in methane emissions from the Southern Ocean seafloor due to increases in the temperature of bottom water temperatures), and if this trend continues, then the Southern Hemisphere could be a significant source of additional atmospheric methane (this century).

It is estimated that seagrass beds occupy just 0.2 % of the ocean seafloor but account for an astonishing 10 % of all the carbon buried annually in the sea.

Nissan's AVM technology will help remotely operated vehicles (ROVs) operators avoid obstacles and navigate the ocean seafloor more easily while they search deep underwater for resources.

Southern Ocean seafloor water temperatures are projected to warm by an average of 0.4 °C over this century with some areas possibly increasing by as much as 2 °C.

Studies have shown that Earth's mantle holds several oceans» worth of water that was dragged underground by plate tectonics and subduction of the ocean seafloor.

«More «losers» than «winners» predicted for Southern Ocean seafloor animals.»

Microbial life, however, should have survived in or around cracks in warm ocean seafloors, deep volcanic vents, surface volcanic springs, and other warm niches.

Not exact matches

More amazingly, we now know that beneath the crust of Enceladus is a global ocean of liquid saltwater and organic molecules, all being heated by hydrothermal vents on the seafloor.

The foundation of the research involved tracking the changes in ocean circulation in new detail by studying three sediment cores extracted from the seafloor of the Gulf of Mexico in 2010 during a scientific cruise.

A new map of the surrounding seafloor helps explain why: Many of the fastest - melting glaciers sit atop deep fjords that allow Atlantic Ocean water to melt them from below.

We found that the particles seen in our images, which were droplets of ocean only hours earlier, bore evidence of large organic molecules and compounds that indicated hydrothermal activity similar to that observed at deep - sea vents on Earth's seafloor.

The study uses data from two NASA missions — Operation IceBridge, which measures ice thickness and gravity from aircraft, and Oceans Melting Greenland, or OMG, which uses sonar and gravity instruments to map the shape and depth of the seafloor close to the ice front.

RAPID RETREAT New seafloor data reveal that Køge Bugt (shown) and other fast - retreating glaciers in southeastern Greenland sit within deep fjords, allowing warm Atlantic Ocean water to speed up melting.

The coolest point beneath the ridges was found near the lowest point, an area of very deep and rugged seafloor known as the Australian - Antarctic discordance in the Indian Ocean.

«We talk about finding, searching for signs of life on some of these ocean worlds, and in particular these geologically active ocean worlds with rocky seafloors like Europa.»

He called it Tektite, for meteors that survive their fall through the atmosphere, crashing into the ocean and leaving pearl - like fields of debris along the seafloor.

Through the process of seafloor spreading, new ocean crust continually comes into being here.

OCEAN MOTION The 2011 tsunami that devastated Japan (forecast shown) was fueled by both the horizontal and vertical motion of the seafloor, new research suggests.

At the time, scientists already had developed remotely operated vehicles that could roam the seafloor, and placed instruments on the ocean's bottom that could record uninterrupted measurements for years.

Led by Ken Buesseler, a senior scientist and marine chemist at the Woods Hole Oceanographic Institution (WHOI), the team found that a small fraction of contaminated seafloor sediments off Fukushima are moved offshore by typhoons that resuspend radioactive particles in the water, which then travel laterally with southeasterly currents into the Pacific Ocean.

But some of them also wind up as a part of a hidden underground flow that seeps into the ocean through seafloor fissures.

When it's cold enough to form ice shelves that extend over the Antarctic land mass and into the ocean, much of what drops to the seafloor is sand and gravel that the glacier has picked up on its slow march from the continent's ice cap.

The presence of sea salt on Europa's surface suggests the ocean is interacting with its rocky seafloor — an important consideration in determining whether the icy moon could support life.

Perhaps extra carbon dioxide from a period of heightened seafloor eruptions eventually percolates through the ocean and into the atmosphere, allowing warming that would deliver a coup de grâce to the massive ice sheets.

The evidence comes from seafloor spreading centers: sites throughout the ocean where plates of ocean crust move apart and magma erupts in between, building new crust onto the plates» trailing edges.

The team were able to draw these conclusions by analysing new data from the chemical composition of the fossilised shells of sea surface and seafloor organisms from that period, taken from drilling cores from the ocean floor in the South Atlantic.

Cores taken from under the open ocean are often stained green from microscopic plants called diatoms that settle to the seafloor after dying, but this core contained none.

At high velocities deep in the ocean, that dual pressure heaves water with forces powerful enough to generate a tsunami, as a similarly massive chunk of seafloor did in the 2011 event in Japan.

The authors argue that it comes from hydrothermal activity on the ocean floor, perhaps seafloor vents like those on Earth that spew H2 and support rich microbial life.

Ocean - based wind turbines don't need to be firmly anchored to the seafloor, according to a new study.

For days or even weeks at a time, these guns send a volley of ear - shattering sound through the ocean to impact the seafloor every ten seconds or so.

The organisms likely survive using mechanisms similar to the ever - increasing parade of creatures that have been discovered living in the total darkness of hydrothermal vents at the bottom of the ocean, deriving energy from minerals in seafloor rocks.

Initially, scientists thought that no species, let alone a bustling community, could survive the scorching temperatures and crushing pressures of these sites, most of which are located about 7,000 feet below the ocean surface in areas of seafloor spreading.

A research group comprising Project Researcher Yusuke Yamashita, Assistant Professor Tomoaki Yamada, Professor Masanao Shinohara and Professor Kazushige Obara at the University of Tokyo Earthquake Research Institute and researchers at Kyushu University, Kagoshima University, Nagasaki University, and the National Research Institute for Earth Science and Disaster Prevention, carried out ocean bottom seismological observation using 12 ocean bottom seismometers installed on the seafloor of Hyuga - nada from April to July 2013.

Once that data has been collected, he will apply the techniques he developed on the Juan de Fuca in the hope of learning more about what lies beneath the seafloor in the old oceans, where mysterious undulations in Earth's gravity field have been measured.

That enabled geologists to make before - and - after assessments of how the seafloor rearranged itself in the Sumatra - Andaman earthquake of December 26, 2004, which triggered the awful Indian Ocean tsunami.

Working in remote conditions, researchers in the winter of 2012 ran a drill through 450 meters of ice and 500 meters of ocean to collect seafloor sediments on either side of this lost bulwark.

Bowen says the two relatively rapid carbon releases (about 1,500 years each) are more consistent with warming oceans or an undersea landslide triggering the melting of frozen methane on the seafloor and large emissions to the atmosphere, where it became carbon dioxide within decades.

The seafloor animals of the Southern Ocean shelf have long been isolated by the deep ocean surrounding Antarctica and the Antarctic Circumpolar Current, with little scope for southward migraOcean shelf have long been isolated by the deep ocean surrounding Antarctica and the Antarctic Circumpolar Current, with little scope for southward migraocean surrounding Antarctica and the Antarctic Circumpolar Current, with little scope for southward migration.

The ash was deposited on the seafloor after being blown through plumes that rose miles into the atmosphere and drifted over the ocean.

This past June scientists at NASA's Stennis Space Center in Mississippi reported that the eyewall's extreme conditions can stir up ocean currents 300 feet below the surface, disrupting sediment and organisms on the seafloor for as long as a week after the storm subsides.

A major new survey of the seafloor has found that even in the deepest ocean depths you can find bottles, plastic bags, fishing nets and other types of human litter.

The selective extinction of large - bodied animals could have serious consequences for the health of marine ecosystems, the scientists say, because they tend to be at the tops of food webs and their movements through the water column and the seafloor help cycle nutrients through the oceans.

Not the least of the challenges is that marine hydrate deposits are located in ocean mud up to a kilometer below the seafloor.

This is partially because oxygen, which causes the iron to precipitate, had not yet entered the ocean to great depths, and also because the seafloor at that time contained abundant iron released by bursts of hydrothermal activity.

The new discoveries show that the formation 40 to 50 million years ago of the «Pacific Ring of Fire,» an active seafloor zone along the perimeter of the Pacific Ocean, caused dramatic changes in ocean depth and volcanic activity and buckled the seabed of Zealandia, according to DicOcean, caused dramatic changes in ocean depth and volcanic activity and buckled the seabed of Zealandia, according to Dicocean depth and volcanic activity and buckled the seabed of Zealandia, according to Dickens.