Sentences with phrase «methane hydrate deposits»

Question # 2: If the planet is cooling, why would formerly frozen methane hydrate deposits be thawing and releasing all over the globe?

On catastrophic methane degassing: Shakova and Semiletov have proposed a mechanism — the destabilisation of the permafrost cap overlying large methane hydrate deposits that contain a high proportion of free gas.

The methane hydrate deposits in the Arctic Ocean may represent a somewhat greater hazard because the Arctic is warming so rapidly.

I don't know of other discussion in the literature looking specifically at changes in warm currents in relation to known methane hydrate deposits.

Re # 194 — Is there any connection between the dead zones off the Oregon and Gulf coasts and the large methane hydrate deposits off those same coasts?

They claim that salt allows the methane hydrate deposits to be at the «triple point» of the system making the system much more temperature sensitive than low salt deposits.

A research team led by The University of Texas at Austin has been awarded approximately $ 58 million to analyze methane hydrate deposits under the Gulf of Mexico.

I refer to the carbon held in undersea methane hydrate deposits, the methane held in tundral permafrost, the organic carbon held in broad scale peat deposits, the organic carbon held in deep sea ooze deposits, the inorganic carbon held in outcropping karstic limestones, calcretes etc., etc..

Q: «Have any such remarkably shallow methane hydrate deposits on the ESAS been directly observed / sampled...?»

The consortium will coordinate scientific input and develop plans for future marine hydrate expeditions to conduct research drilling, recovering samples of the formation, logging and analytical activities to assess the geologic occurrence, regional context, and characteristics of methane hydrate deposits along the continental margins of the United States, likely focusing on the Gulf of Mexico and the Atlantic margin.

You left out the stark tragedies of ocean acidification and the very real possibility of a runaway methane release from warming permafrost and methane hydrate deposits.

The time needed to destabilize large methane hydrate deposits in deep sediments is likely millennia [215].

But include methane hydrate deposits being able to be mined, then appears to more total energy in oceanic methane deposit: «Recent estimates constrained by direct sampling suggest the global inventory occupies between 1 × 10 ^ 15 and 3 × 10 ^ 15 m ³ (0.24 to 1.2 million cubic miles).

The US Department of Energy (DOE) National Energy Technology Laboratory has issued a solicitation (DE-FOA-0000891) for up to $ 20 million in funding for projects that focus on the following three technical topic areas: (1) characterization of methane hydrate deposits; (2) response of methane hydrate reservoirs to induced environmental change; and... Read more →

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).

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.

There also vast amounts of CO2 associated with ocean methane hydrate deposits.

This in turn is contributing to releasing methane hydrate deposits which threatens all life on Earth (search «geoengineering / methane release» on line).

SkS: In your JGR paper from 2010 you state that methane hydrate in Siberia can occur at depths as shallow as 20 m. Have any such remarkably shallow methane hydrate deposits on the ESAS been directly observed / sampled and if so, how could methane hydrate have formed at such depths?

The time needed to destabilize large methane hydrate deposits in deep sediments is likely millennia [215].

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.

Given the vastness of the world's marine methane hydrate deposits — more than twice the carbon reserves of all other fossil fuels combined — it's not surprising that government agencies and the petroleum and natural gas industries have long been interested in harvesting this new energy supply.

And I assume from the article that if the methane hydrate deposit is melting then the bottom water will have a high level of dissolved methane.

Not exact matches

Gas hydrates, icelike deposits of methane locked away in permafrost and buried at the ocean bottom, may pose a threat to our climate (see Discover, March 2004).

Far more is locked away in frozen deposits called methane gas hydrates.

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

Under most frozen hydrate deposits is a layer of free methane gas occupying the pore spaces in the sediment.

Methane escapes from hydrate deposits even when the pieces don't float to the surface intact.

In March, Japan became the first country to successfully extract methane from frozen undersea deposits called gas hydrates.

This issue has quickly risen because Japan conducted its second production test of these deposits, known as methane hydrates, in May.

Winning such claims can open the door to oil, natural gas, mineral deposits, methane hydrates and even shellfish.

Worldwide, particularly in deeply buried permafrost and in high - latitude ocean sediments where pressures are high and temperatures are below freezing, icy deposits called hydrates hold immense amounts of methane (SN: 6/25/05, p. 410).

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

I have posted on RealClimate about 4 times in the past 5 years regarding the potential thaw of the methal hydrate deposits at the bottom of the oceans.I stated in my posts on your website that I believe firmly that those deposits are in quite a good bit of danger of melting from climate change feedback mechanisms.On Nov 8th, ScienceDaily posted a huge new study on the PETM boundary 55 million years ago, and some key data on how the methane at that point may very well have melted and contributed to the massive climate shift.I am an amateur who reads in the new a lot about climate change.I'd now like to say «I told you so!!!»

That Shakhova 2010 paper opens with: «The sharp growth in methane emission (50 Gt over 1 - 5 years) from destructed gas hydrate deposits on the ESS should result in an increase in the global surface temperature by 3.3 C by the end of the current century instead of the expected 2C.»

It seems quite likely that continued global warming will increase the emissions of methane from permafrost deposits and marine hydrates.

In Siberian permafrost, large deposits of methane gas are trapped in ice, forming what is called a gas hydrate.

What is concerning is the possibility that rapid global warming could occur faster than many people believe is possible, if global warming due to atmospheric carbon dioxide causes the Earth's atmosphere to warm enough to release enormous deposits of frozen methane (CH4) that are stored in the permafrost above the Arctic Circle and in frozen methane ice, known as methane hydrate, underneath the floors of the oceans throughout the world (see: How Methane Gas Releases Due To Global Warming Could Cause Human Extinmethane (CH4) that are stored in the permafrost above the Arctic Circle and in frozen methane ice, known as methane hydrate, underneath the floors of the oceans throughout the world (see: How Methane Gas Releases Due To Global Warming Could Cause Human Extinmethane ice, known as methane hydrate, underneath the floors of the oceans throughout the world (see: How Methane Gas Releases Due To Global Warming Could Cause Human Extinmethane hydrate, underneath the floors of the oceans throughout the world (see: How Methane Gas Releases Due To Global Warming Could Cause Human ExtinMethane Gas Releases Due To Global Warming Could Cause Human Extinction).

Another vast source of methane is in icy deposits known as methane hydrates, often in sediments deep under the world's oceans.

The «methane bomb» idea refers to deep water seafloor hydrate deposits.

Methane is a greenhouse gas 20 times more potent than carbon dioxide, and it is thought that some gas hydrate deposits could become unstable if disturbed.

So, hydrates are highly concentrated deposits of methane compared to free gas reservoirs, at least for gas reservoirs located above a few km of burial.

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.

It would be quite a coincidence, Berndt said, to find methane emissions in a place where the water is warming and where there are known hydrate deposits — and to have those three things be completely unrelated.

However, the source of these methane emissions remains a matter of dispute, as other scientists investigating the phenomenon point out that while large deposits of methane hydrates could be breaking up, the other possibility is a slow leak of methane that has already gone on for hundreds of years.

[20] Other problems facing commercial exploitation are detection of viable reserves and development of the technology for extracting methane gas from the hydrate deposits.

Economic deposits of hydrate are termed Natural Gas Hydrate (NGH) and are unique in that they store 164 m3 of methane, 0.8 m3 water in 1 m3 hhydrate are termed Natural Gas Hydrate (NGH) and are unique in that they store 164 m3 of methane, 0.8 m3 water in 1 m3 hHydrate (NGH) and are unique in that they store 164 m3 of methane, 0.8 m3 water in 1 m3 hydratehydrate.

Also, most of the methane is in the deep gas deposits, not in the possible regional layer of shallow methane hydrate possibly associated with the Yamal crater.

The 12/12/2005 RC article on methane hydrate (I'm sorry but I don't know how to provide the url) refers to large hydrate deposits along the Oregon and Gulf coasts.

RealClimate is wonderful, and an excellent source of reliable information.As I've said before, methane is an extremely dangerous component to global warming.Comment # 20 is correct.There is a sharp melting point to frozen methane.A huge increase in the release of methane could happen within the next 50 years.At what point in the Earth's temperature rise and the rise of co2 would a huge methane melt occur?No one has answered that definitive issue.If I ask you all at what point would huge amounts of extra methane start melting, i.e at what temperature rise of the ocean near the Artic methane ice deposits would the methane melt, or at what point in the rise of co2 concentrations in the atmosphere would the methane melt, I believe that no one could currently tell me the actual answer as to where the sharp melting point exists.Of course, once that tipping point has been reached, and billions of tons of methane outgass from what had been locked stores of methane, locked away for an eternity, it is exactly the same as the burning of stored fossil fuels which have been stored for an eternity as well.And even though methane does not have as long a life as co2, while it is around in the air it can cause other tipping points, i.e. permafrost melting, to arrive much sooner.I will reiterate what I've said before on this and other sites.Methane is a hugely underreported, underestimated risk.How about RealClimate attempts to model exactly what would happen to other tipping points, such as the melting permafrost, if indeed a huge increase in the melting of the methal hydrate ice WERE to occur within the next 50 years.My amateur guess is that the huge, albeit temporary, increase in methane over even three or four decades might push other relevent tipping points to arrive much, much, sooner than they normally would, thereby vastly incresing negative feedback mechanisms.We KNOW that quick, huge, changes occured in the Earth's climate in the past.See other relevent posts in the past from Realclimate.Climate often does not change slowly, but undergoes huge, quick, changes periodically, due to negative feedbacks accumulating, and tipping the climate to a quick change.Why should the danger from huge potential methane releases be vievwed with any less trepidation?