Sentences with phrase «frozen methane hydrate»

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

On March 12, 2013, JOGMEC researchers announced that they had successfully extracted natural gas from frozen methane hydrate.

Geologist Gerry Dickens suggested that the increased carbon - 12 could have been rapidly released by upwellings of frozen methane hydrate from the seabeds.

Similar frozen methane hydrates occur throughout the same arctic region as they did in the past, and warming of the ocean and release of this methane is of key concern as methane is 20x the impact of CO2 as a greenhouse gas.

When I read it I had in mind the frozen methane hydrates at the bottom of the ocean (from «biologic processes»).

Not exact matches

The race is on to tap the world's biggest and most unusual fossil fuel supply — methane trapped in frozen hydrates in permafrost and at the bottom of the ocean

Under the ice sheet the methane became stored as hydrate, a solid form of frozen methane.

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

The timing is coincident with a period of global warming, and Williscroft and colleagues suggest that it was this warming that released methane frozen as methane hydrates in the sea floor, as a relatively sudden methane «burp.»

There is so much methane that, as it freezes instantaneously to form hydrate, it draws all the water out of the seafloor ooze and dries it out completely — and often there is methane left over, trapped as large bubbles in the porous hydrate.

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

As it approaches the seafloor, it chills, and in many places it freezes, together with water in the mud, into solid methane hydrate (white).

Scientists excavating the ocean floor have found huge chunks of frozen methane along Hydrate Ridge, about 60 miles off the coast of Oregon.

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

This glowing ledge showed that the mound contained methane hydrate, a lattice of frozen water that traps methane gas molecules within its icy cages.

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).

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).

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

An increased concentration of methane release, Gustafsson suspects, may be coming from collapsing «methane hydrates» — pockets of the gas that were once trapped in frozen water on the ocean floor.

It can also melt vast quantities of methane hydrates frozen into tundra, and also at depths along the oceanic continental shelves.

It can also melt vast quantities of methane hydrates frozen into tundra,...»

Methane hydrates are another form of frozen carbon, found in deeper soils.

The methane release happens because the gas is freed from melting hydrates — an icy substance found below the ocean floor, containing methane in a cage of frozen water.

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).

Especially worrying is the observation that up to 10 percent of this area is now being punctured by so - called taliks areas of thawed permafrost that provide avenues for the ready escape of methane and opportunities for warmth to penetrate deep into the frozen hydrate beneath.

The lakes may also be storing large volumes of the potent greenhouse gas methane, frozen in a form called methane hydrates.

Methane hydrates — methane molecules trapped in frozen water molecule cages in tundra and on continental shelves — and organic matter such as peat locked in frozen soils (permafrost) are likely mechanisms in the past hyperthermals, and they provide another climate feedback with the potential to amplify global warming if large scale thawing occurs [209]-Methane hydrates — methane molecules trapped in frozen water molecule cages in tundra and on continental shelves — and organic matter such as peat locked in frozen soils (permafrost) are likely mechanisms in the past hyperthermals, and they provide another climate feedback with the potential to amplify global warming if large scale thawing occurs [209]-methane molecules trapped in frozen water molecule cages in tundra and on continental shelves — and organic matter such as peat locked in frozen soils (permafrost) are likely mechanisms in the past hyperthermals, and they provide another climate feedback with the potential to amplify global warming if large scale thawing occurs [209]--[210].

Widespread release of methane from hydrates has happened a couple of other times — once apparently during the Paleocene / Eocene thermal maximum, and apparently back in the Precambrian, in a really huge event that rescued the earth from a frozen «snowball earth» state.

Warming bottom waters in deeper parts of the ocean, where surface sediment is much colder than freezing and the hydrate stability zone is relatively thick, would not thaw hydrates near the sediment surface, but downward heat diffusion into the sediment column would thin the stability zone from below, causing basal hydrates to decompose, releasing gaseous methane.

Interest in high - latitude methane and carbon cycles is motivated by the existence of very large stores of carbon (C), in potentially labile reservoirs of soil organic carbon in permafrost (frozen) soils and in methane - containing ices called methane hydrate or clathrate, especially offshore in ocean marginal sediments.

The expedition started from the well - established fact that an enormous amount of methane is frozen into a kind of ice known as methane hydrate, buried in seafloor sediments and containing perhaps twice as much carbon as all the world's fossil - fuel reserves combined.

Frozen Heat: UNEP Global Outlook on Methane Gas Hydrates.

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?

An increased concentration of methane release, Gustafsson suspects, may be coming from collapsing «methane hydrates» - pockets of the gas that were once trapped in frozen water on the ocean floor.

There is an enormous amount of methane (CH4) on earth frozen into a type of ice called methane hydrate.