Sentences with phrase «about global methane»

A mystery about global methane trends just got more muddled.

Links to non-EPA web sites provide additional information about the Global Methane Initiative's activities in the agriculture sector.

Not exact matches

But the livestock sector is responsible for about 14.5 percent of global greenhouse gas emissions, through cows producing methane and production processes - comparable to all the direct emissions from cars, planes, ships and other transport.

At least two studies have been published since 2010 that suggest reducing soot and methane would cut human - caused global temperature increases by half of a degree Celsius, or about 1 degree Fahrenheit, by 2050.

Alaska composes about one percent of Earth's total land area, and its estimated annual emissions in 2012 equaled about one percent of total global methane emissions.

Since methane can cause about 20 times as much atmospheric warming as carbon dioxide, curbing methane would help slow global warming.

Natural gas is primarily composed of methane, a gas with about 30 times the global warming power of carbon dioxide.

The methane hydrates with the highest climate susceptibility are in upper continental margin slopes, like those that ring the Arctic Ocean, representing about 3.5 percent of the global methane hydrate inventory, says Carolyn Ruppel, a scientist who leads the Gas Hydrates Project at the USGS.

It is shown that if global methane emissions were to increase by factors of 2.5 and 5.2 above current emissions, the indirect contributions to RF would be about 250 % and 400 %, respectively, of the RF that can be attributed to directly emitted methane alone.

As global methane levels have increased, the impact has been felt twice as much in the Arctic, about a half a degree Celsius more of Arctic warming,

As global methane levels have increased, the impact has been felt twice as much in the Arctic, about a half a degree Celsius more of Arctic warming, according to climate models.

Raymond Pierrehumbert, an Oxford University atmospheric physics professor who believes cutting carbon dioxide emissions is more urgent than cutting methane emissions, said Howarth's research offers little new information about the role of natural gas production in global warming.

Re «Estimates of the drivers of global temperature change in the ice ages show that the changes in greenhouse gases (CO2, methane and nitrous oxide) made up about a third of the effect, amplifying the ice sheet changes by about 50 % (Köhler et al, 2010).»

Usually when we talk about transportation emissions causing climate change here at TreeHugger, we focus on CO2 emissions or methane emissions — the usual suspects in the global warming discussion.

Then U.S. shale gas production could account for about 12 percent of the global methane increase over that time (it scales at approximately 4 percent of global increase per 1 percent leak rate).

Peer - reviewed studies have raised concerns about how much methane is leaking throughout the production and transmission of natural gas, casting doubt on whether it really is better for global warming than coal, which burns 50 percent more carbon than natural gas.

Or, trying to «correct» for the different lifetimes of the gases using Global Warming Potentials, over a 100 - year time horizon (which still way under - represents the lifetime of the CO2), you get that the methane would be equivalent to increasing CO2 to about 500 ppm, lower than 750 because the CO2 forcing lasts longer than the methane, which the GWP calculation tries in its own myopic way to account for.

«And we found that the estimates of methane emissions per area of reservoir are about 25 percent higher than previously thought, which we think is significant given the global boom in dam construction, which is currently underway.»

Peatlands and mangroves are well known for their huge carbon - storing potential — mangrove soils alone store up to 4 times more carbon than trees — however, less is known about methane and nitrous oxide emissions, which may be important for their global warming potential, warns Hergoualc» h.

Why the heck would they be concerned about reducing methane emissions if global warming is primarily a product of natural variation?

And melting permafrost might release a lot of high - global - warming - potential methane, but we don't have enough experience with that to say anything sensible about it.

I certainly don't assume that «business as usual» is about to come to an abrupt halt, nor that permafrost methane is about to greatly magnify global warming.

Each ton of methane has an impact on global warming about 200 times that of a ton of CO2 while it remains in the atmosphere, but methane remains for a relatively short time (12.4 years on average), whereas CO2 remains about ten times longer.

Finally, while economics may be critical to your definition of «catastrophic» anthropogenic global warming, economics says nothing about the science underlying the projections of sea level rise, the physics of Arctic amplification, changes to albedo that lead to greater warming that may lead to significant releases of methane clathrate deposits, regional projections of reduce (or enhanced) precipitation, and so on.

-- It was on Panorama about 7 years ago that I heared about James Hansen talking about how he was being «gagged» by NASA re AGW and about global dimming and how methane calthrates could eventually rise to the surface with a vision of the oceans igniting in flames — I kid you not.

Dr Nisbet's hypothesis about the tropical wetlands is the most alarming, for it could signal an Arctic - like feedback loop there, whereby global warming could be causing them to release more methane by making them hotter and wetter.

You don't need to go into the details about carbon emissions or chemical processes or quantities of global ice loss or sea level elevations or ocean acidification or the potential feedback loop of tundra methane releases, although there is plenty of available information on all of them.

Much hydrogen is itself produced in the atmopshere by the oxidation of methane, with total global emisssions estimated to be about 70 million tonnes each year.

The researchers calculate that overall global methane emissions account for about 16.7 percent of total radiative forcing.

The study, which has been published in the journal Carbon Balance and Management, also showed that methane is responsible for about 16 percent of global greenhouse gas emissions in 2006.

Although most focus has been centered on carbon dioxide because it is more abundant and thus contributes more to global warming, methane is about 30 percent more powerful than carbon dioxide when it comes to trapping heat.

Venting is particularly problematic because methane is 86 times more potent than carbon dioxide as a greenhouse gas and venting accounts for about a third of global methane emissions.

Methane is an invisible, yet powerful, climate pollutant responsible for about 25 % of current global warming.

It is also a modest source of methane (CH4): between 15 and 50 Tg (CH4) / yr are emitted mostly from seasonally unfrozen wetlands corresponding to about 10 % of the global wetland methane source.

Using methane's 20 - year GWP — a measure of the short - term climate impact of different GHGs — increases the share of oil and gas methane to over 8 % of global GHG (with emissions of 5,650 Mt CO2e), the equivalent of about 40 % of total CO2 emissions from global coal combustion in 2012.

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?

About 700,000 tonnes of textiles are sent to landfill every year, but synthetic fibres will not decompose, while woollen garments do decompose and produce methane, contributing to global warming.

Nobody regards the case as closed, and more research is necessary, but most of the methane deposits lining the margins of continents would seem to be fairly low on the list of scientific concerns about global warming.

I don't think that it's «alarmist» to be alarmed about events in the Yamal when seen in this new martian context — Siberian news reports last year described mapping of 7000 methane - venting mounds across the Yamal - Gydan (The Siberian Times, 27/03/2017), a number far in excess of the global frost mound population (~ 5000 [Mackay, 1998]-RRB- as of 1998.

But given what we know now about methane release and global temp spikes and sea level rise and so on, we are poised to soon see the eruption of violent weather events on a scale heretofore unimaginable.

Methane has an atmospheric lifetime of about 12 years and a global warming potential of 28 over a hundred - year period.

For example, global action on black carbon and methane can help slow down expected warming in 2050 by up to 0.5 degree Celsius and avoid about 2.4 million annual premature deaths and 52 million tonnes of annual crop loss by 2030.

New York City About Blog The Carbon Tax Center («CTC») was launched in January 2007 to give voice to Americans who believe that taxing emissions of carbon dioxide along with commensurate taxes on methane and other greenhouse gases is imperative to reduce global warming.