Sentences with phrase «for methane hydrate»

I'm told 100 meters depth is too shallow for methane hydrate formation, in the absence of glaciation.

Can you point out to me where the record demonstrates anything near the kind of rapidity of changes being claimed anecdotally for methane hydrate dissolution?

Most of the shelf is too shallow for methane hydrates, Thornton says.

The stability zones for methane hydrates have been well understood for a long time.

Off the Washington and Oregon coast, 168 bubble plumes had been detected in the past 10 years, a disproportionate number of which were found at a critical depth for methane hydrates» stability.

I suppose coal seams are also often only a few inches thick and prospectors will go to the trouble of blowing off mountaintops to get at the coal, yet that seems almost like a sane plan compared to what people have as pipe dreams for methane hydrates.

There is a sink for methane hydrates.

Not exact matches

Hydrates have shaped the history of our planet: by locking away methane produced in the earth's crust instead of allowing it to accumulate in the atmosphere, they helped to make the earth a hospitable place for life.

Taken together, they also provide a potential explanation for the so - called memory effect — the fact that «aqueous solutions in contact with methane form solid methane hydrate at a much faster rate if they have already undergone a methane hydrate formation - decomposition cycle,» said Alavi, almost as if the hydrate «remembers» its previous state.

One was Hydrate Ridge, selected for its large methane deposits and the unusual chemosynthetic organisms that thrive on top of them.

This created massive craters that are still actively seeping methane» says Karin Andreassen, first author of the study and professor at CAGE Centre for Arctic Gas Hydrate, Environment and Climate.

A crew of a dozen sailors, a geophysics professor, and two graduate students, we were combing the ocean floor for buried methane hydrate, an ice - like form of natural gas estimated to be more abundant than fossil fuels.

(For more on naturally occurring hydrates, see «Will the Methane Bubble Burst?»

Gargantuan stores of gas hydrates under the oceans and permafrost regions of the globe have many scientists wondering whether they can find an economically feasible way to unlock the methane, creating a natural gas supply that could last for centuries.

One hypothesis for the slide was that an earthquake caused the methane hydrates in the region to become unstable and to explosively release their gas.

This is bad news for oil prospectors drilling in permafrost: if they encounter a pocket of hydrates, the released methane could rupture their drilling equipment.

«While a logical suspect for arctic methane emissions is degrading hydrates, there are several other potential methane sources.

Gas hydrates — a mixture of ice and methane — are found only under high pressure and at cold temperatures, and they are expected to make up a significant portion of the energy mix once existing oil fields dwindle, says David Scott, manager of the Northern Resources Development Program for Natural Resources Canada.

For example, data from this study has been used to examine the evolution of gas hydrate stability within the Eurasian Arctic over glacial timescales, exploring the development of massive mounds and methane blow - out craters that have been recently discovered on the Arctic seafloor.

Dlugokencky, in an e-mail, wrote there have been «no significant increases in Arctic emissions over the past few decades» and that it would take «centuries» for warming to affect methane hydrate — bearing sediments.

Methane hydrates, after all, were largely responsible for corrupting the containment dome intended to stop the 2010 Deepwater Horizon oil spill rising from the ocean bottom; the viscous mixture clogged the dome and a redirection pipe intended to take leaking oil to a tanker waiting above.

Most methane hydrates are buried in ocean water so deep that the journey through the water column is too far for the gas to ever reach the atmosphere, according to Ed Dlugokencky, a researcher at the National Oceanic and Atmospheric Administration.

Tapping into thawing permafrost for methane — which does not necessarily mean methane hydrates — would also present similar risks in producing conventional natural gas.

A June 2017 study by the Center for Arctic, Gas Hydrate, Environment and Climate (CAGE) concluded those unexpected methane blasts, rather than gradual releases, are a big problem.

Once formed by either serpentinization or microbes, methane could be stored as a stable clathrate hydrate — a chemical structure that traps methane molecules like animals in a cage — for later release to the atmosphere, perhaps by gradual outgassing through cracks and fissures or by episodic bursts triggered by volcanism.

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.

[Response: For climate purposes, the problem is coal (and maybe methane hydrates)-- there is more than enough fossil fuel reserves for the IPCC scenariFor climate purposes, the problem is coal (and maybe methane hydrates)-- there is more than enough fossil fuel reserves for the IPCC scenarifor the IPCC scenarios.

Umbertoluca Ranieri, PhD student at ILL and EPFL, and lead author of this study says: «These results are important in improving our understanding of many fundamental non-equilibrium phenomena involving methane clathrate hydrates; for example, the replacement kinetics during gas exchange in case of conversion between the clathrate structures I and II.

My research indicates that the Siberian peat moss, Arctic tundra, and methal hydrates (frozen methane at the bottom of the ocean) all have an excellent chance of melting and releasing their stored co2.Recent methane concentration figures also hit the news last week, and methane has increased after a long time being steady.The forests of north america are drying out and are very susceptible to massive insect infestations and wildfires, and the massive die offs - 25 % of total forests, have begun.And, the most recent stories on the Amazon forecast that with the change in rainfall patterns one third of the Amazon will dry and turn to grassland, thereby creating a domino cascade effect for the rest of the Amazon.With co2 levels risng faster now that the oceans have reached carrying capacity, the oceans having become also more acidic, and the looming threat of a North Atlanic current shutdown (note the recent terrible news on salinity upwelling levels off Greenland,) and the change in cold water upwellings, leading to far less biomass for the fish to feed upon, all lead to the conclusion we may not have to worry about NASA completing its inventory of near earth objects greater than 140 meters across by 2026 (Recent Benjamin Dean astronomy lecture here in San Francisco).

Here, we report on advances made in methane hydrate research and deep - ocean Raman spectroscopy, and on proposals for fossil fuel CO2 sequestration and on controlled ocean acidification studies.

The required additional fossil fuels will involve exploitation of tar sands, tar shale, hydrofracking for oil and gas, coal mining, drilling in the Arctic, Amazon, deep ocean, and other remote regions, and possibly exploitation of methane hydrates.

Seems to me we heard for a long time the «methane emergency... shallow hydrates» story repeated — and now the «shallow hydrates» term has dropped out of the claims (except for the copypasted repetition of old stories).

Recent studies have therefore preferred mechanismsthat require a climatological trigger for carbon injection, for example through enhance - 5 ment of seasonal extremes that caused changes in ocean circulation, which in turncould dissociate submarine methane hydrates (Lunt et al., 2011).

Methane hydrates have been on everyone's radar for some time.

Mark, do a google scholar search on Semiletov or Shakhova for recent work on methane hydrates.

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?

As you might expect, the hypothesis that methane hydrates was a contributor to the PETM has been kicking around for a while.

At 0 degrees C, you need a pressure equivalent to ~ 250 meters of water depth to get enough dissolved methane for hydrate to form.

• Similarly, Eillott et al (2011), Reagan (2011) and Reagan and Moridis (2008), for the equivalent of RCP 8.5 50 % CL methane emissions from global marine methane hydrates could be 0.3 GtCH4 / yr by 2100.

It takes a long time to warm the deep ocean and the clathrate zone, and no one has proposed a mechanism for getting much methane release from hydrates in the coming century.

(Methane hydrate can be found close to the sediment surface in deeper water depth settings, as for example in the Gulf of Mexico or the Nankai trough).

Generally, there are indications that if we reach 4 to 6C rise there is a chance possibly for larger methane hydrate release once the oceans warm up.

Flaming ice, methane hydrate, could make Japan energy self - sufficient as fracking has done for the USA.

For this feature, however, I don't think methane hydrate would have been stable, unless it was deeper than a few hundred meters (depending on the surface temperature.

Plumes of rising methane bubbles have been mapped off the coast of Svalbard to where the water is about 400 meters deep — the edge of the stability zone for hydrates.

Throw in a huge uncertainty as to whether commercial exploitation of methane hydrates is possible and what impact that may have, I am quite comfortable in projecting a range of variations for CH4 levels in 100 years time.

It works just as welling for fracking (or sea - floor methane hydrate) for that matter: Just because you end up using, say, half the energy you dig out of the ground (or sea - bottom) in the extraction process doesn't mean that, given modern automation, the entire process can't be controlled by a few thousand people, working short hours in comfortable, climate - controlled, environments.

Through a combination of sediment cores analyses and ice - sheet modelling, the study shows that this area has probably been steadily leaking methane from hydrates for 8000 years.

These look to be sufficient to supply energy for hundreds of years — even without accessing even more «unconventional» sources such as methane hydrates.

«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.»