Sentences with phrase «from seafloor»

The source of this CO2 is unclear, but the most likely explanations include methane released from the seafloor and / or burning peat.

They are deploying a tactic called counter-illumination — they emit just enough light to match the moonlight from above, effectively erasing their shadows from the seafloor so that predators can't stalk them by the dark shape below.

This report on methane releases from the seafloor puts the East Siberian Arctic Shelf (ESAS) on par with the tundra in potential methane releases.

The 0.088 GT of CO2 from seafloor volcanoes seems fairly insignificant compared to other sources.

In addition to immediate release of greenhouse gases from seafloor eruptions, the subsequent increased high and low temperature hydrothermal venting may impact the CO2 output.

Methane was seeping from the seafloor for thousands of years following the retreat of the Barents Sea ice sheet, shows a groundbreaking new study in Nature Communications.

An educated guess would be that the leak originated under water, potentially from the pipeline leading from the Douglas Complex, from the riser pipe from the seafloor to the OSI, or from the seafloor junction between the two.

Figure 2: A piece of methane hydrate dredged from the seafloor.

doi: 10.1073 / pnas.1618926114 Press release, USGS: Ocean Absorption of Carbon Dioxide More than Makes Up for Methane Emissions from Seafloor Methane Seeps

They hope to gather sonar images, sediments and other evidence from the seafloor that might reveal hidden structures...

This helps scientists understand whether methane release from the seafloor is a recent phenomenon, or if it is a natural process that has been persisting over thousands of years.

1:55 p.m. Updated Nelson's office just released fresh video provided by BP showing the oil gushing from the kinked portion of the «riser,» the pipe that once led upward from the seafloor well but now is crumpled:

A «non-significant» heat source is from seafloor spreading.

Her work immediately brought to mind the ceramics of Joan Lederman, an artist in Woods Hole, Mass., who creates glazes from seafloor sediments retrieved by oceanographers roaming the world from the nearby Woods Hole Oceanographic Institution:

It discusses the clay mineral composition of sediment samples taken from the seafloor surface and marine cores in order to decipher spatial and temporal changes in the sediment provenance.

As federal officials prepare to test whether they can ignite a patch of the oil slick spreading from the seafloor wreckage of the Gulf of Mexico well, seasoned specialists say the logic in pursuing this option is clear and well established by decades of testing.

The Cathedral is aptly named, with coral spires and towers that rise up from the seafloor in large segments.

Seamounts are underwater mountains that rise hundreds or thousands of feet from the seafloor.

From seafloor to outer space, a distance of about 30 miles (50 kilometers), the grains spend a few months to a few years in transit, otherwise they would grow much larger.

It rises up from the seafloor and may come to just above or just under the water's surface.

Underwater, high bandwidth free - space optical communications in both high and low ambient light conditions enabling untethered remotely operated submersibles and data harvesting from seafloor observatories

Boulder, Colo., USA: Cretaceous climate warming led to a significant methane release from the seafloor, indicating potential for similar destabilization of gas hydrates under modern global warming.

The finding might help explain the huge amounts of methane that occasionally belch from the seafloor, an event linked to rapid climate change.

And the wellhead, protruding from the seafloor, spewed millions of gallons of crude into the ocean.

«We (and others) have seen CH4 reaching the atmosphere from seafloor sources, notably on the East Siberian Arctic shelf, and smaller amounts elsewhere.

Not only can they hide from mackerel amongst the jellies» stinger - covered tentacles when they rise from the seafloor to feed and digest at night, they can also survive for hours within the ocean floor's low - or no - oxygen muds, which are pervaded by poisonous hydrogen sulfide gas — an inhospitable place lacking any other vertebrate species.

If the pressure is too low or the temperature too high, the hydrates dissociate (break down), the methane is released and the gas can seep from the seafloor into the ocean.

Samples from the seafloor confirm this assumption.

«We do observe ancient methane being emitted from the seafloor to the overlying seawater, confirming past suspicions,» Kessler says.

Although the researchers did not examine in this study what prevents methane released from the seafloor from reaching the atmosphere, they suspect it is biodegraded by microorganisms in the ocean before it hits the surface waters.

Our goal was to fingerprint the source of methane in the Arctic Ocean to determine if ancient methane was being liberated from the seafloor and if it survives to be emitted to the atmosphere,» says Sparrow, who conducted the study, published in Science Advances, as part of her doctoral research at the University of Rochester.

The sensors from the pit and from the seafloor above are all linked in a network of cables that sends real - time observations to monitoring stations and to local governments and businesses.

A large, drum - shaped cutting tool at the end of a long boom will be able to cut up to 6,000 tons of sulfide rock a day from the seafloor, chopping it into nuggets of an inch or less.

Of the many questions that cling to scenarios of methane - driven climate change, the biggest is this: Can methane from melting hydrates actually make it from the seafloor to the atmosphere?

But Erwin Suess of the Research Center for Marine Geosciences (GEOMAR) in Kiel, Germany, and his colleagues have found a shortcut by which methane zooms from the seafloor to the sky.

Huge quantities of methane, the theories say, have escaped from seafloor hydrates at various times in the past, wreaking havoc.

All the methane that is now being converted to carbonate and biomass would instead be bubbling freely from the seafloor — everywhere.

What captured Boetius's imagination there were the clusters of organisms, known as cold - seep communities, which had taken up residence around the places where methane seeps from the seafloor.

Ambient geothermal heat emanating up from the seafloor melts the underside of the ice sheet at a rate of several penny thicknesses per year.

Hydrothermal vents form by an analogous method: Ion - rich hot water is expelled from the seafloor and then begins to dissolve, forming a porous shell of metal extending upward.

The AUV team, led by MBARI engineer David Caress, pored over the detailed bathymetric map they created from the AUV data and saw a number of mounds and spires rising up from the seafloor.

While some of today's sea lilies are able to detach their holdfasts from the seafloor and walk short distances on their arms, they don't do it often.

Previous evidence from seafloor sediments elsewhere is consistent with two Paleocene - Eocene carbon pulses, which «means we don't think this is something is unique to northern Wyoming,» Bowen says.

In the climate research community, ice cores are generally considered the gold standard, because their layers are highly consistent, unlike sediment layers from the seafloor, which are frequently marred by tectonic shifts, currents or marine organisms.

This causes methane release from the seafloor, and potentially into the atmosphere.

Alternatives exist, from seafloor vibration - producers to revamped air guns that produce less sound but equally good images.

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 researchers, centered at the University of Tsukuba, described two specimens of X. japonica dredged from the seafloor of the western Pacific: a female about 5 cm in length, and a juvenile about 1 cm in length.

Though the narrow focus was lobster biology, Tektite's overarching mission was exploring just how marine research might most effectively be carried out from a seafloor base.

About 10 feet from the seafloor, a trigger core hits bottom and releases the main core, which drops the remainder of the way by gravity and buries itself in the mud.