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Selected tag(s): Methane

New Study Underscores Urgent Need to Reduce Methane Emissions from Natural Gas Operations

By Steven Hamburg / Published: November 26, 2013

You may have seen news reports about a new methane emissions study conducted by climate researchers from Harvard and seven other institutions and just published in Proceedings of the National Academy of Sciences (PNAS). The new paper provides an improved estimate of the total methane budget of the US – in other words, how much methane is being released into the atmosphere each year from all sources, including livestock and oil-and-gas production.

Based on analysis of nearly 5,000 air samples collected in 2007 and 2008 from ten communications towers located around the country, as well as 7,700 samples taken in those years from an aircraft monitoring program, the study finds that total methane emissions due to human activity were roughly 1.5 times greater at that time than previously estimated. Emissions from livestock were roughly twice as high as previous estimates. Emissions from oil-and-gas operations in Oklahoma and Texas were 2.7 times higher than estimated.

We are glad to see the methane issue getting the attention it deserves. While EDF’s work to deepen our understanding of current emissions continues, there’s no question about the need for regulation to measure and reduce these emissions. In August, scientists with the National Oceanic and Atmospheric Administration (NOAA) and the University of Colorado (UC) at Boulder published a long-awaited paper on methane leakage in the journal Geophysical Research Letters that reported an alarmingly high level of methane emissions in the Uintah Basin of Utah — 6.2 to 11.7 percent of total production for an area about 1,000 square miles. Read More »

Colorado’s Proposal Shows What it Takes to Make Progress on Climate

By Eric Pooley / Published: November 20, 2013

morberg /flickr

This commentary originally appeared on our EDF Voices: People on the Planet blog.

At a time when partisan rancor is the order of the day, this week’s news out of Colorado is a tribute to the power of partnership. On Monday, Governor John Hickenlooper of Colorado proposed new regulations for oil and gas operations that, if adopted, will cut both conventional air pollution and climate pollution – by making Colorado the first state in the nation to tackle the problem of methane emissions. The big announcement showed that industry leaders, state officials and an environmental group like Environmental Defense Fund can sit down together to negotiate a plan to deliver cleaner, safer air. And just in time. As EDF’s Rocky Mountain Regional Director Dan Grossman told NPR this week, “the fundamental question [is] whether or not citizens will tolerate oil and gas development.”

On Election Day, four Colorado communities voted to ban hydraulic fracturing. State officials and industry leaders are getting the message: public trust has been badly damaged, and the only way to restore it is by putting in place strong rules to protect air, water, and communities. Not every community is going to ban oil and gas development, obviously, so we need to protect the many places where it is happening.

While the new Colorado proposal doesn’t address all the issues surrounding oil and gas development, the governor and the state’s regulators should be applauded for their efforts in bringing forward these commonsense air pollution measures, which were agreed to and supported by EDF, Anadarko Petroleum, Encana, and Noble Energy. And we’re not the only ones who think so. Newspapers from Los Angeles to Denver to New York wrote in support of the new rules. New York Times columnist Joe Nocera praised both the proposed legislation and Environmental Defense Fund’s collaborative approach in an op-ed published Monday. Read More »

Posted in Colorado, Natural Gas / Also tagged Colorado, Natural Gas | Read 1 Response

Methane: a Key to Dealing With Carbon Pollution?

By Steven Hamburg / Published: November 5, 2013

Carbon is typically considered enemy number one in the context of climate-altering pollution. There is good reason why. Carbon dioxide (CO₂) emitted from power plants is the leading source of U.S. greenhouse (GHG) emissions. Beyond our borders, the historic level of 400 parts per million of GHGs entering into our earth’s atmosphere was passed just five months ago – an indication of the rapid rise in human-produced emissions.

And while reducing carbon pollution is the primary goal of EDF’s climate agenda, so is minimizing methane emissions from natural gas development. That’s because methane, the main ingredient in natural gas, is a powerful GHG that can cause major climate damage in the short term. In fact, a recent analysis by many of the world’s top experts on evolving climate science, the Intergovernmental Panel on Climate Change (IPCC), reports methane to be at least 84 times more potent than CO₂ over the first two decades. On a 100-year timeframe, methane is at least 28 times more potent. These are noticeable changes in methane’s Global Warming Potential (GWP) from the IPCC’s last assessment in 2007, with values raised from 72 to 84 and 25 to 28, roughly a 17 percent increase on a 20-year time horizon and a 12 percent increase on a 100-year basis.

IPCC’s fifth assessment (AR5) also quantitatively discusses two additional indirect effects that further increase, albeit modestly, methane’s GWP. First, IPCC considers climate-carbon feedbacks and reports two sets of GWP values: one that accounts for the feedbacks and another that excludes them (they conclude that including this effect is “likely” to give a more accurate estimate of climate impacts from emissions of greenhouse gases like methane or CH₄). The 20-year GWP for methane with feedbacks increases from 84 to 86, with the 100-year GWP up from 28 to 34. The explanation for this feedback is diminishing ability of oceans and soils to absorb carbon dioxide as the climate warms. As a result, as methane emissions warm the climate, more CO₂ that would have historically been absorbed by the land and ocean remains in the atmosphere, causing additional warming. The second effect now quantified by the IPCC is the production of additional CO₂ as CH₄ is oxidized in the atmosphere, which adds another point or two to methane’s GWP.

Posted in Climate, Natural Gas / Also tagged climate change, IPCC | Read 1 Response

Industry And Environmentalists Make Progress On Fracking

By Mark Brownstein / Published: March 29, 2013

This commentary was originally posted on our EDF Voices blog.

Source: danielfoster437/Flickr

Worthy public policy initiatives get announced every day of the week, and reporters mostly greet them with a shrug. But last week’s announcement of a new center designed to set standards for shale gas development in the Appalachian Basin triggered a wave of media attention.

The Washington Post called the Center for Sustainable Shale Development (CSSD), “a heartening breakthrough in the war over fracking.” And the Associated Press wrote: “Some of the nation’s biggest oil and gas companies have made peace with environmentalists, agreeing to a voluntary set of tough new standards for fracking in the Northeast….”

I agree that this is a big deal, and not just because EDF played an important role in the two years of negotiation that led to the formation of this group. It’s a rare to see environmentalists and some of the nation’s biggest energy companies working together to improve the safety of natural gas operations. This coalition is a step in the right direction to better protect the quality of life for people living among the gas fields.

But, I also need to make a few points clear.

First, the standards put forth by CSSD are no substitute for strong regulation and enforcement. Voluntary efforts by industry leaders help distinguish the best from the rest and raise the bar for all, but the only path to full protection of our air, water, and health is regulation and enforcement that apply to all. Read More »

Posted in Natural Gas / Also tagged Center for Sustainable Shale Development, CSSD | Comments are closed

Study Intends To Determine Methane Leakage Associated With A Growing Natural Gas Transportation Sector

By EDF Blogs / Published: March 4, 2013

This blog post was written by Jason Mathers, Senior Manager of EDF’s Corporate Partnerships Program.

Source: Waste Management

The use of natural gas to power our nation’s freight fleet vehicles is a hot topic in these days of rising diesel and falling natural gas prices. There are several reasons to be excited about this opportunity, including operating cost savings, use of a domestic fuel source, and the potential for a reduction in greenhouse gas (GHG) emissions compared to diesel heavy-duty trucks. However, significant concerns remain with the development of new gas supplies, including the threat of fugitive methane emissions from natural gas vehicles and the fuel supply chain.

Methane is the main ingredient in natural gas and a GHG pollutant many times more potent than carbon dioxide (CO2), the principal contributor to man-made climate change. Even small amounts of methane leakage across the natural gas supply chain can undermine the climate benefit of switching to natural gas from other fossil fuels for some period of time.

In a paper published last year, EDF scientists and other leading researchers examined the impact of potential fugitive emissions on the climate benefits of a switch from diesel to natural gas heavy-duty trucks. The study found that, according to the best available data, methane leak rates would need to be below 1% of gas produced in order to ensure that switching from diesel to natural gas produces climate benefits at all points in time. They also found that – using the EPA leakage rate estimates at that time – converting a fleet of heavy duty diesel vehicles to natural gas would result in increased climate warming for more than 250 years before any climate benefits were achieved.

EDF is working with leading researchers and companies in a series of studies designed to better understand and characterize the methane leak rate across the natural gas supply chain. The studies will take direct measurements at various points across the production, gathering and processing, long distance transmission and storage, local distribution, and transportation. The first study, led by researchers at the University of Texas, is measuring emissions from natural gas production. Results will be released in the coming months. Read More »

Posted in Climate, Methane, Natural Gas / Also tagged climate change | Read 1 Response

Measuring Fugitive Methane Emissions

By Steven Hamburg / Published: January 4, 2013

In recent days, news reports and blog posts have highlighted the problem of fugitive methane emissions from natural gas production — leakage of a potent greenhouse gas with the potential to undermine the carbon advantage that natural gas, when combusted, holds over other fossil fuels. These news accounts, based on important studies in the Denver-Julesburg Basin of Colorado and the Uinta Basin of Utah by scientists affiliated with the National Oceanic and Atmospheric Administration (NOAA) and the University of Colorado (UC) at Boulder, have reported troubling leakage rates of 4% and 9% of total production, respectively —higher than the current Environment Protection Agency (EPA) leakage estimate of 2.3%.

While the Colorado and Utah studies offer valuable snapshots of a specific place on a specific day, neither is a systematic measurement across geographies and extended time periods and that is what’s necessary to accurately scope the dimensions of the fugitive methane problem. For this reason, conclusions should not be drawn about total leakage based on these preliminary, localized reports. Drawing conclusions from such results would be like trying to draw an elephant after touching two small sections of the animal’s skin: the picture is unlikely to be accurate. In the coming months, ongoing work by the NOAA/UC team, as well as by Environmental Defense Fund (EDF) and other academic and industry partners, will provide a far more systematic view that will greatly increase our understanding of the fugitive methane issue, though additional studies will still be needed to fully resolve the picture. What follows is a briefing on the fugitive methane issue, including the range of measurements currently underway and the need for rigorous data collection along the entire natural gas supply chain.

Why methane leakage matters. Natural gas, which is mostly methane, burns with fewer carbon dioxide emissions than other fossil fuels. However, when uncombusted methane leaks into the atmosphere from wells, pipelines and storage facilities, it acts as a powerful greenhouse gas with enormous implications for global climate change due to its short-term potency: Over a 20-year time frame, each pound of methane is 72 times more powerful at increasing the retention of heat in the atmosphere than a pound of carbon dioxide. Based on EPA’s projections, if we could drastically reduce global emissions of short-term climate forcers such as methane and fluorinated gases over the next 20 years, we could slow the increase in net radiative forcing (heating of the atmosphere) by one third or more.

Fugitive methane emissions from natural gas production, transportation and distribution are the single largest U.S. source of short-term climate forcing gases. The EPA estimates that 2.3% of total natural gas production is lost to leakage, but this estimate, based on early 1990’s data, is sorely in need of updating. The industry claims a leakage rate of about 1.6%. Cornell University professor Robert Howarth has estimated that total fugitive emissions of 3.6 to 7.9% over the lifetime of a well.

To determine the true parameters of the problem, EDF is working with diverse academic partners including the University of Texas at Austin, the NOAA/UC scientists and dozens of industry partners on direct measurements of fugitive emissions from the U.S. natural gas supply chain. The initiative is comprised of a series of more than ten studies that will analyze emissions from the production, gathering, processing, long-distance transmission and local distribution of natural gas, and will gather data on the use of natural gas in the transportation sector. In addition to analyzing industry data, the participants are collecting field measurements at facilities across the country. The researchers leading these studies expect to submit the first of these studies for publication in February 2013, with the others to be submitted over the course of the year. Read More »

Posted in Methane, Natural Gas / Also tagged Fugitive Emissions, Nature | Read 4 Responses