Methane hydrate floats in seawater just as water ice floats, and it also has greater potential to reach
the atmosphere than methane bubbles (Brewer et al., 2002).
The GHG value is a function of converting the methane into carbon dioxide, which traps less heat in
the atmosphere than methane.
The greenhouse gas (GHG) value is a function of converting the methane into carbon dioxide, which traps less heat in
the atmosphere than methane.
Any methane released from under retreating ice sheets is more likely to find its way into
the atmosphere than methane released from deep - sea methane hydrates, because the methane - consuming seabed sediments and the overlying sea water are absent in Antarctica.
Not exact matches
Natural gas is primarily composed of
methane, a greenhouse gas that is more potent
than carbon dioxide, but remains in the
atmosphere for less time.
Aliso Canyon Southern California Edison Last year's rupture in the Aliso Canyon natural gas reservoir caused a
methane gas spill that displaced more
than 8,000 Californians and released an unprecedented 1.6 million pounds of
methane into the
atmosphere.
As one of the group's leaders, Hsu Jen - hsiu, rightly says eating less or no meat is a way to love our planet because livestock emit large volumes of
methane into the
atmosphere, which contribute more to global warming
than the emissions produced by all the vehicles around the world.
Methane also remains in the
atmosphere for 9 to 15 years; nitrous oxide remains in the
atmosphere for 114 years, on average, and is 296 times more potent
than CO2 — the gases released today will continue to be active in degrading the climate decades from now.
Another major benefit of covered anaerobic lagoons is that the
methane biogas produced within them is not only prevented from escaping into the
atmosphere (where it is many times more damaging
than C02 emissions) but is also harnessed to generate energy — rather
than waste water being heavy consumers of energy in processing and oxygenation.
By capturing
methane gas from cow manure and using it to generate electrical power, the Straus Dairy Farm prevents a greenhouse gas that is 72 times more detrimental
than CO2 within a 20 - year period from getting into the
atmosphere, while also creating a renewable energy source.
Another major benefit of covered anaerobic lagoons with efficient green energy storage is that the
methane biogas produced is not only prevented from escaping into the
atmosphere (where it is many times more damaging
than C02 emissions) but is also harnessed to generate energy — rather
than waste water plants being heavy consumers of energy in processing and oxygenation.
The most important is preventing
methane gas, a greenhouse gas but a short - term pollutant that is 72 times more detrimental
than carbon dioxide within a 20 - year period, from entering the
atmosphere.
Methane or natural gas is 72 times more potent at capturing heat in the
atmosphere than carbon dioxide over the first 20 years after release - and to deal with climate change, we need to focus on the next few decades.
Saturn's moon Titan is the only moon in the solar system that has an
atmosphere as thick as Earth's, consisting of more
than 98 percent nitrogen, roughly 1.4 percent of
methane, and smaller amounts of other gases.
«Although most of the macrophyte carbon is released back to the
atmosphere in the same form that it is assimilated, carbon dioxide, some of it is actually exported to the ocean as dissolved carbon or released to the
atmosphere as
methane, a gas that has a warming potential 20 times larger
than carbon dioxide,» said John Melack, a professor at the University of California, Santa Barbara.
«Titan's
atmosphere is made up mainly of nitrogen and
methane, with 50 % higher pressure at its surface
than on Earth,» said Andrew Coates (UCL Mullard Space Science Laboratory), who led the study.
Ozone,
methane and aerosols (tiny pollutant particles) remain in the
atmosphere for a shorter time
than CO2, but can affect both the climate and air quality.
But when unburned
methane is released into the
atmosphere, it is a potent greenhouse gas with a warming potential 28 to 34 times greater
than carbon dioxide over a 100 - year timeframe (and up to 84 times more potent over a 20 year timeframe).
Methane is an extremely efficient greenhouse gas which may contribute to enhanced global warming when free in the atmosphere, and such free methane, would then be considered a pollutant rather than a useful energy re
Methane is an extremely efficient greenhouse gas which may contribute to enhanced global warming when free in the
atmosphere, and such free
methane, would then be considered a pollutant rather than a useful energy re
methane, would then be considered a pollutant rather
than a useful energy resource.
Those trees are going to fall down and rot and turn into
methane, which is much worse
than carbon dioxide,» he said, noting that by turning wood chips into biofuel, his company would actually be reducing greenhouse gases from the
atmosphere.
Experts on greenhouse - gas emissions tell me that every time my car burns a gallon of gasoline, I am putting more
than 25 pounds of carbon dioxide into the
atmosphere as well as a smaller amount of
methane, nitrous oxide, and various other toxic gases.
Cattle are responsible for 20 percent of U.S. emissions of
methane, which traps heat in the
atmosphere 20 times more effectively
than carbon dioxide.
To get a different view, astronomer Giovanna Tinetti and her colleagues at the European Space Agency and University College London focused instead on the light grazing the
atmosphere of HD 189733 b. Tinetti had predicted that water would absorb more light at the longer wavelength of 5.8 microns (thousandths of a millimeter)
than at 3.6 microns, in contrast with other molecules such as
methane and ammonia.
Although the concentration of carbon dioxide in the
atmosphere is much higher, at around 385 parts per million,
methane is a worry as it is much better
than carbon dioxide at locking in heat from solar radiation.
Carbon dioxide gets more press, but
methane is the more powerful agent of global warming, 21 times more effective
than carbon dioxide at trapping heat in the
atmosphere.
«It is true that they do warm climate by strong
methane emissions when they first form, but on a longer - term scale, they switch to become climate coolers because they ultimately soak up more carbon from the
atmosphere than they ever release.»
If Pluto's surface harbours both nitrogen ice and
methane ice, Pluto's
atmosphere must contain more nitrogen gas
than methane gas, say the astronomers.
Molecular nitrogen (N2) dominates the
atmosphere (at altitudes of less
than 1800 kilometers or so), whereas
methane (CH4), acetylene (C2H2), ethylene (C2H4), and ethane (C2H6) are abundant minor species and likely feed the production of an extensive haze that encompasses Pluto.
At their highest, the bursts contained about 10 times more
methane than the background in the
atmosphere.
Consider, Rein says, the spectrum of light that distant astronomers might see if Earth — whose
atmosphere is more
than 20 % oxygen — had a moon with a
methane - rich
atmosphere like Saturn's moon Titan.
«We found that places like the Chesapeake Bay could be a more significant input of
methane to the
atmosphere than we thought.»
However, a new study finds that estuaries like the Chesapeake Bay could be contributing significantly more
methane to the
atmosphere than once thought.
Yesterday, two Cornell University professors said at a press conference that fracking releases large amounts of natural gas, which consists mostly of
methane, directly into the
atmosphere — much more
than previously thought.
Molecule for molecule,
methane traps 20 to 25 times more heat in the
atmosphere than does carbon dioxide.
That's bad news for the
atmosphere when the gas in question is
methane, the primary component in natural gas that is a much stronger greenhouse gas
than carbon dioxide.
The study also found that open landfills emit 91 percent of all landfill
methane emissions, while closed landfills are 17 percent more efficient
than open landfills at capturing
methane so it does not escape into the
atmosphere.
That's because
methane (or CH4) has more
than 30 times the global warming impact of carbon dioxide (CO2) over 100 years (and its more
than 80 times more powerful over 20 years, since
methane disappears from the
atmosphere far more quickly
than CO2).
But strangely, they seem to produce far more
methane than they release into the
atmosphere.
«One source of potent greenhouse gas pinned down: Results suggest more
methane may be released into
atmosphere than thought.»
Methane doesn't last as long in the
atmosphere, but it is much more efficient
than carbon dioxide at trapping heat.
Given that most fishes convert feed to flesh much more efficiently
than cows, as well as producing healthier food and contributing less
methane to the
atmosphere, an alternative would be to reduce beef production and instead use available land to grow crops for fish feed.
Consequently, massive amounts of reactive gases such as oxygen, hydrogen, and
methane are continually being added to Earth's now «anomalous»
atmosphere faster
than they would otherwise be removed by inorganic chemical processes.
A greenhouse gas 20 times more potent
than carbon dioxide,
methane in the
atmosphere would accelerate global warming even further.
On March 19, 2008, astronomers using the Hubble Space Telescope announced confirmation of the presence of water and the detection of more
methane in the
atmosphere of the planet
than would be predicted by conventional atmospheric models for «hot Jupiters» (Hubble news release and videos; ESA news release and videos; and Swain et al, 2008 — more below).
[Response: The concentration of
methane in seawater can be measured, and I think the ocean is very often a source to the
atmosphere, rather
than a sink.
One possible explanation is that the Hubble observations were more sensitive to the perpetual dark nightside of the planet where the
atmosphere is slightly colder and the photochemical mechanisms that destroy
methane are less efficient
than on the dayside.
On the long term (longer
than a few decades) the transient
methane concentration is determined by the chronic rate of
methane emission to the
atmosphere.
According to a new analysis in the journal Ecological Monographs, by researchers at the University of Wisconsin — Madison and colleagues, the world's rivers and streams pump about 10 times more
methane into our
atmosphere than scientists estimated in previous studies.
And finally, what about Mark's questions (# 3) and other factors not discussed here — do all these effects re Arctic ice lead scientists to believe there is a greater and / or earlier chance (assuming we continue increasing our GHG emissions — business as usual) of melting hydrates and permafrost releasing vast stores of
methane into the
atmosphere than scientists believed before the study, or is the assessment of this about the same, or scientists are not sure if this study indicates a greater / lesser / same chance of this?
It is less prevalent
than carbon dioxide in the
atmosphere but also more potent: A molecule of
methane results in more warming
than a molecule of carbon dioxide.