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Methane Sources Undersea methane hydrates, leakage from hundreds of thousands of forgotten wells, fracks, cracks and fissures -- these sources may result in extremely rapid global warming. | ||
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Methane clathrate - Wikipedia, the free encyclopedia
Methane clathrate (CH 4·5.75H 2 O), also called methane hydrate , hydromethane , methane ice , fire ice , natural gas hydrate , or gas hydrate , is a solid clathrate compound (more specifically, a clathrate hydrate ) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice . ... 5 Natural gas hydrates versus liquified natural gas in transportation
Clathrate gun hypothesis - Wikipedia, the free encyclopedia
The sudden release of large amounts of natural gas from methane clathrate deposits in runaway climate change could be a cause of past, future, and present climate changes. ... The clathrate gun hypothesis is the popular name given to the hypothesis that increases in sea temperatures (and/or falls in sea level) can trigger the sudden release of methane from methane clathrate compounds buried in seabeds and permafrost which, because the methane itself is a powerful greenhouse gas , leads to further temperature rise and further methane clathrate destabilization -- in effect initiating a runaway process as irreversible, once started, as the firing of a gun.
High-resolution carbon dioxide concentration record 650,000-800,000[thinsp]years before present : Abstract : Nature
Top of page Changes in past atmospheric carbon dioxide concentrations can be determined by measuring the composition of air trapped in ice cores from Antarctica. ... Here we present results of the lowest 200 m of the Dome C ice core, extending the record of atmospheric carbon dioxide concentration by two complete glacial cycles to 800,000 yr before present.
Exclusive: The methane time bomb - Climate Change - Environment - The Independent
Methane is about 20 times more powerful as a greenhouse gas than carbon dioxide and many scientists fear that its release could accelerate global warming in a giant positive feedback where more atmospheric methane causes higher temperatures, leading to further permafrost melting and the release of yet more methane. ... At some locations, methane concentrations reached 100 times background levels.
Carbon Neutral Methane Energy Production from Hydrate Deposits | Earth & Environmental Engineering
We are using this experimental apparatus to verify the feasibility of gas hydrates dissociation by down-hole combustion and to understand important characteristics such as temperature and pressure profiles for methane hydrate formation and dissociation in different systems. ... Calculations and simulations using FEMLAB⢠show the method offers an energy efficient and environmental friendly way to produce natural gas from hydrate reservoirs.
The Straight Dope: Are there deposits of methane under the sea? Will global warming release the methane to the atmosphere?
What's the straight dope on methane lurking beneath the sea. ... In 1964, however, a Siberian gas rig discovered a large methane hydrate deposit underground, spurring research on whether such deposits could be a good source of natural gas.
BBC News - Methane seeps from Arctic sea-bed
As temperatures rise, the sea-bed grows warmer and frozen water crystals in the sediment break down, allowing methane trapped inside them to escape. ... So far scientists haven't detected methane breaking the ocean surface - but they don't rule out the possibility
Arctic permafrost leaking methane at record levels, figures show | Environment | The Guardian
Just 2 percent of global methane comes from Arctic latitudes, the study found, though the region showed the largest increases. ... About two-thirds of global methane comes from man-made sources, and levels have more than doubled since the industrial revolution.
Methane Causes Vicious Cycle In Global Warming : NPR
But global methane projects practically ground to a halt last year. ... But at least half of methane emissions are from human activities, ranging from cattle-rearing and natural gas exploration to coal mining.
Delaware-size gas plume over West illustrates the cost of leaking methane - The Washington Post
For local environmental groups, gas-flaring is a tangible reminder of the downsides of an industry that provides tens of millions of dollars to local economies as well as to federal tax coffers. ... The energy boom in the Southwest is raising concerns about greenhouse gas pollution as well as the possible defacing of ancient ruins of cities built by Pueblo Indian tribes centuries ago.
Abandoned U.S. Oil Wells Still Spewing Methane, Study Finds
Methane warms the climate at least 80 times more than the same amount of carbon dioxide, the most prevalent greenhouse gas, over a 20-year period. ... Environmental groups have told the EPA that directly targeting methane rather than secondary volatile organic compounds, which the agency currently regulates, is more effective and can help the United States make steeper greenhouse gas emission cuts.
As permafrost soils thaw, soil microbes amplify global climate change -- ScienceDaily
As permafrost soils thaw, soil microbes amplify global climate change
BBC News - Concentrations of warming gases break record
The levels of gases in the atmosphere that drive global warming increased to a record high in 2012.
Study Of Best Fracked Wells Finds Low Methane Emissions, But Skips Super-Emitters | ThinkProgress
The largest single source of U.S. methane emissions is the vast network of infrastructure that supplies natural gas. ... UT estimates the national methane leakage rate associated with the phase of natural gas extraction to be equivalent to 0.42 percent of total U.S. natural gas produced.