Sentences with phrase «natural emissions of methane»

Methane is a key greenhouse gas; the Arctic is a key region for natural emissions of methane; high summer and autumn are key periods when emissions can peak and change rapidly.

Not exact matches

Disclosing the Facts: Transparency and Risk in Methane Emissions focuses on the critical risk of methane emissions and how companies are managing methane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energy mMethane Emissions focuses on the critical risk of methane emissions and how companies are managing methane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energyEmissions focuses on the critical risk of methane emissions and how companies are managing methane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energy mmethane emissions and how companies are managing methane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energyemissions and how companies are managing methane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energy mmethane reduction, reflecting rising investor concern that excessive methane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energy mmethane emissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energyemissions from oil and gas operations will undercut the potential net climate benefit of substituting natural gas for coal, especially in decarbonizing energy markets.

Regulating emissions of methane from fracking to free natural gas will have important co-benefits in slowing climate change

While this is a good way to get total emissions of methane in a remote location where the main source of the gas is natural gas production, it is not a good way to pin emissions down to any one well, gathering or processing activity in the basin.

It is a member of a U.N. - led initiative to reduce emissions of methane, a potent greenhouse gas that is the primary component of natural gas.

A team of researchers from the Cockrell School of Engineering at The University of Texas at Austin and environmental testing firm URS reports that a small subset of natural gas wells are responsible for the majority of methane emissions from two major sources — liquid unloadings and pneumatic controller equipment — at natural gas production sites.

The study team believes this research, published Dec. 9 in Environmental Science & Technology, will help to provide a clearer picture of methane emissions from natural gas production sites.

The study team hopes its measurements of liquid unloadings and pneumatic devices will provide a clearer picture of methane emissions from natural gas well sites and about the relationship between well characteristics and emissions.

Lamb's methane emissions project is part of a group of ongoing studies that are looking at the entire natural gas supply chain, from the production wells to the transmission pipeline system to local distribution systems.

A new study provides one of the first quantitative estimates of the methane leak rate from the blowout of a natural gas well in California in 2015, suggesting that emissions from this event temporarily doubled those from all other sources in the entire Los Angeles Basin, including landfills, dairies, and other leaks.

For its part, AGA is quick to highlight U.S. EPA's estimates of methane emissions from natural gas.

Single - point failures of natural gas infrastructure can hamper methane emission control strategies designed to mitigate climate change.

There are also outstanding questions related to the real - world efficiency gains of natural gas fuels and the life - cycle emissions they produce based on methane leakage in the production process.

About 0.6 kilograms of methane emerge each second in the summer, Mumma said, which is comparable to the emissions from a natural oil seep near Santa Barbara, California.

The conclusion of the authors: The warming climate triggers not only the natural production of biogenic methane, it can also lead to stronger emissions of fossil gas.

This stability in methane levels had led scientists to believe that emissions of the gas from natural sources like livestock and wetlands, as well as from human activities like coal and gas production, were balanced by the rate of destruction of methane in the atmosphere.

Environmental controls designed to prevent leaks of methane from newly drilled natural gas wells are effective, a study has found — but emissions from existing wells in production are much higher than previously believed.

«Every tonne of greenhouse gas that we emit leads to additional emissions from natural sources such as methane bubbles,» says Kosten.

A new study finds that methane emissions from shale gas production are nearly 50 times lower than previous estimates, improving the climate benefit of switching from coal to natural gas.

Many emission factors used to estimate releases of methane — a potent greenhouse gas associated with oil and natural gas development — are «far too low,» says Robert Howarth, an ecology and environmental biology professor at Cornell University.

It produces less carbon dioxide emissions than coal for electricity or gasoline and diesel for fuel, but even a small amount of natural gas release — which is essentially methane — packs a greenhouse gas punch about 30 times more powerful than the same amount of carbon dioxide.

David Allen, a University of Texas researcher who conducted measurements from natural gas fields to measure methane emissions, called the study an «important contribution.»

«If we want natural gas to be the cleanest fossil fuel source, methane emissions have to be reduced,» says Gabrielle Pétron, an atmospheric scientist at NOAA and at the University of Colorado in Boulder, and first author on the study, currently in press at the Journal of Geophysical Research.

When ruminants digest their feed, methane is formed as a natural by - product of the microbial process in the rumen, and since methane is a 25 times more powerful greenhouse gas than carbon dioxide, there is a need to devise methods to reduce such emissions from cattle.

Urban areas and their aging natural gas pipes and valves are also responsible for a lot of methane emissions, which is about 35 times as potent as a greenhouse gas over the span of 100 years and makes up about 10 percent of all U.S. greenhouse gas emissions in terms of CO2 equivalents.

The bulk of methane emissions in the United States can be traced to a small number of «super emitting» natural gas wells, according to a new study.

The study found that natural gas end use sources — like gas meters, furnaces, boilers and hot water heaters — as well as landfills, are responsible for a large portion of urban methane emissions.

Methane emissions from fossil fuel industry and natural geological leakage are up to 110 per cent greater than current estimates, according to a detailed analysis of methane sources published in Nature thiMethane emissions from fossil fuel industry and natural geological leakage are up to 110 per cent greater than current estimates, according to a detailed analysis of methane sources published in Nature thimethane sources published in Nature this week.

These include increased use of renewable natural gas, reduced fugitive methane emissions, less need for synthetic fertilizers, and increased land restoration.

Previous studies suggest that natural geologic methane emissions of the past are at least as high as natural emissions today, so studying the ancient ice cores allows researchers to accurately determine the upper limit of geologic emissions, separate from their anthropogenic counterparts.

Although climate patterns in the future may not exactly mimic those conditions, the period of warming allowed Petrenko to reveal an important piece of the climate puzzle: natural methane emissions from ancient carbon reservoirs are smaller than researchers previously thought.

That meant, for example, traveling the globe to the various natural emissions sources — such as wetlands and land seeps — and conducting measurements and calculations of the methane emitted.

In the Four Corners region, which is the area where New Mexico, Arizona, Colorado and Utah meet, the methane emissions are caused mainly by the production and transport of natural gas from coal beds, said the NASA team.

A University of Texas study found last year that natural gas wells leak methane at about the rate reported in U.S. Environmental Protection Agency methane emission inventories, and the leaks can be contained with emissions control technology.

The EPA estimated in 2011 that natural gas drilling accounts for about 1,200 gigagrams, or 2.6 billion pounds, of methane emissions each year from well completions, equipment leaks and pneumatic controllers.

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.

However, the stark reality is that global emissions have accelerated (Fig. 1) and new efforts are underway to massively expand fossil fuel extraction [7]--[9] by drilling to increasing ocean depths and into the Arctic, squeezing oil from tar sands and tar shale, hydro - fracking to expand extraction of natural gas, developing exploitation of methane hydrates, and mining of coal via mountaintop removal and mechanized long - wall mining.

The EPA's most recent geenhouse gas inventories show that natural gas production and distribution is the second largest source of methane emissions nationwide, just behind methane emissions from livestock.

The study shows that during drilling, as much as 34 grams of methane per second were spewing into the air from seven natural gas well pads in southwest Pennsylvania — up to 1,000 times the EPA estimate for methane emissions during drilling, Purdue atmospheric chemistry professor and study lead author Paul Shepson said in a statement.

This work presents direct measurements of methane emissions from multiple sources at onshore natural gas production sites incorporating operational practices that have been adopted or become more prevalent since the 1990s.

We find (i) measurements at all scales show that official inventories consistently underestimate actual CH4 [methane] emissions, with the natural gas and oil sectors as important contributors; (ii) many independent experiments suggest that a small number of «super-emitters» could be responsible for a large fraction of leakage; (iii) recent regional atmospheric studies with very high emissions rates are unlikely to be representative of typical natural gas system leakage rates; and (iv) assessments using 100 - year impact indicators show system - wide leakage is unlikely to be large enough to negate climate benefits of coal - to - natural gas substitution.

Using this new information as well as other independent studies on methane emissions published since 2011, and the latest information on the climate influence of methane compared to carbon dioxide from the latest synthesis report from the Intergovernmental Panel on Climate Change released in September of this year, it is clear that natural gas is no bridge fuel.

Fugitive methane emissions from distribution mains account for 32 percent of methane emissions from the U.S. natural gas distribution sector.

The nation's largest single source of methane emissions is the vast network of infrastructure, including wells, pipelines and storage facilities, that supplies U.S. natural gas.

The UT study, which only deals with the extraction phase of the natural gas supply chain, is the opening chapter in this broader scientific effort designed to advance the current understanding of the climate implications of methane emissions resulting from the U.S. natural gas boom.

That's why a great deal of attention was paid last week to the results of a two - day aerial survey over gas fields in southwestern Pennsylvania that calculated emission rates of methane (the main component of natural gas) from two well pads still in the drilling phase.

The E.P.A. and EDGAR use a bottom - up approach, calculating total emissions based on «emissions factors» — the amount of methane typically released per cow or per unit of coal or natural gas sold, for example.

Experts agree that methane leaked or vented from natural gas operations is a real concern, yet estimated emission rates vary greatly 3/4 from 1 to 8 percent of total production.

In Mexico, methane from landfills, a natural byproduct of decomposing organic matter known as landfill gas, or LFG, makes up 10 percent of all greenhouse gas emissions.

I note your point that most of the natural methane release comes from the tropics, so a 100 x increase in Arctic emissions would lead to only a x10 increase in natural methane releases overall.