Sentences with phrase «of methane hydrate»

The black contour shows the limits of the methane hydrate stability zone.

These are connected to melting of methane hydrate, an ice - like substance that forms, and is stable, under the sea floor in cold temperatures and under high pressure.

The rising sea level increases pressure at certain depths, which expands the area of methane hydrate stability.

Scientists from India, Japan and the United States USGS, have discovered large deposits of methane hydrates in the Bay of Bengal.

Furthermore, the project will investigate potential future climate effects from destabilisation of methane hydrate deposits in a warming climate, and will focus on scenarios in 2050 and 2100.

However, the stark reality is that global emissions have accelerated (Fig. 1) and new efforts are underway to massively expand fossil fuel extraction [7]--[9] by drilling to increasing ocean depths and into the Arctic, squeezing oil from tar sands and tar shale, hydro - fracking to expand extraction of natural gas, developing exploitation of methane hydrates, and mining of coal via mountaintop removal and mechanized long - wall mining.

Warming the fuel for the fire: evidence for the thermal dissociation of methane hydrate during the Paleocene — Eocene thermal maximum

Trapped deep in the ocean floor are huge quantities of methane hydrates frozen in ice structures called clathrates.

These new projects, managed by the Energy Department's National Energy Technology Laboratory, will focus research on field programs for deepwater hydrate characterization, the response of methane hydrate systems to changing climates, and advances in the understanding of gas - hydrate - bearing deposits.

In fact, only one source of carbon that is isotopically light and available in large enough quantities has been pinpointed so far, this is the reservoir of methane hydrate deposits (Figure 2) buried on the continental shelves of the oceans (Figure 3).

If an anthropogenic thermal anomaly this century will eventually (and inexorably) propogate to and destabalize significant amounts of methane hydrates in future centuries — shouldn't this be a consideration for policy makers?

Here in Oregon we are the somewhat unwitting hosts of a great deal of methane hydrate research by Oregon State University, some Texas university people (and backing by the good old Houston - based gas industry), of deposits on and near the ocean floor on the Gorda Ridge just off our coast, which is a consequence of the subduction zone geomorphology of the area.

Response of Methane Hydrate Systems to Environmental Change.

Furthermore, the project will investigate potential future climate effects from destabilisation of methane hydrate deposits in a warming climate, and will focus on scenarios in 2050 and 2100.

Nature, the same journal which published Wednesday's commentary, published a scientific review of methane hydrates and climate change by Carolyn Ruppel in 2011 which suggests the scenario in said commentary is virtually impossible.

«Uncovering the secrets of ice that burns: Key properties of methane hydrates found in permafrost and on the continental shelf illuminated.»

When you bring a chunk of methane hydrate up to the surface, the water melts and drips through your fingers; the methane gas wafts into the air.

Apparently, there may be huge accumulations of methane hydrates in porous rocks below the Antarctic Ice Sheet.

Sea level and the boundary of the methane hydrate stabililty zone are also shown in black lines.

The US Department of Energy (DOE) has selected 14 new research projects that will be a part of an expanding portfolio of projects designed to increase the understanding of methane hydrates» potential as a future energy... Read more →

Japan will drill 16 shallow exploratory wells in deep waters off its coast, from Mie to Shizuoka prefectures, to determine the expanse and density of methane hydrate deposits.

The characteristics of methane hydrates seem appealing as an explanation for the PETM.

Deborah J. Thomas, James C. Zachos, Timothy J. Bralower, Ellen Thomas, Steven Bohaty; Warming the fuel for the fire: Evidence for the thermal dissociation of methane hydrate during the Paleocene - Eocene thermal maximum.

Both of these findings support the thermal dissociation of methane hydrate as the cause of the Paleocene - Eocene thermal maximum carbon isotope excursion.

A frozen block of methane hydrate (bluish white in center of photo) topped by crust of minerals and mussels.

«If the decomposition of the methane hydrate phase is fast enough, which depends on temperature, the methane gas in the aqueous phase forms nanobubbles,» said Saman Alavi, one of the lead researchers on the project.

A team of scientists from Norway, China and the Netherlands has now shown how the size of grains of the molecules that make up the natural structure of methane hydrates determines how they behave if they are loaded with weight or disturbed.

When thawed, a single cubic metre of methane hydrate can release over 160 cubic metres of gas.

In a paper published in the 2 November edition of Nature Communications, corresponding author Zhang and his colleagues describe how they used a computer simulation of two types of methane hydrates, monocrystalline hydrates and polycrystalline hydrates, to see what would happen if they were compressed or if pressures on the hydrates were suddenly released.

BP's initial attempts this week have been confounded, the company says, by a build - up of methane hydrate crystals blocking the relief pipe.

Exponentially less methane would be able to reach the atmosphere in waters that are thousands of feet deep at the very edge of the shallow seas near continents, which is the area of the ocean where the bulk of methane hydrates are,» Sparrow says.

But judging by today's stores of methane hydrates, there doesn't seem to have been enough methane stored at the time of the PETM to drive that much warming.

Rich deposits of methane hydrate underlie much of the Arctic seafloor.

And in today's The New York Times, on the op - ed page is a piece by Nicolas D. Kristof entitled «The Big Burb Theory of the Apocalypse» and highlighted by the phrase «The invasion of the methane hydrates».

Biastoch, et al (eleven of them, including Latif, and Wallman at the University of Kiel, have thought about the fate of the methane hydrates, and in an article entitled «Rising Arctic Ocean temperatures cause gas hydrate destabilization and ocean acidification» conclude that the major effect will be a decrease of pH, near the Arctic Ocean coasts.

Meanwhile, shale gas «fracking» and the potential recovery of methane hydrates from the ocean floor demonstrate that there is a great deal of R&D left to do in the fossil fuel sector.

«Our investigations show that uplift of the sea floor in this region, caused by the melting of the ice masses since the end of the last ice age, is probably the reason for the dissolution of methane hydrate.»

This has never happened before because the sea ice never retreated very much in the summer and the water temperature could not rise above zero because of the ice cover... The permafrost is acting as a cap for a very large amount of methane (CH4), which is sitting in the sediments underneath in the form of methane hydrates.

Even if the estimates of the ice sheet collapsing by the end of the century were correct, however, it would likely take much longer than that for the effect of methane hydrates to become detectable in the atmosphere, says Alexey Portnov, a researcher at the Arctic University of Tromsø in Norway.

Portnov studies the remnants of methane hydrates exposed at the end of the last ice age in the Arctic, as well as methane hydrates currently thawing out of Arctic permafrost today.