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Climate: Scientists call for cuts in methane emissions

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Cutting methane could slow global temperature surge.

Action could help avert climate tipping points

Staff Report

FRISCO — Leading scientists say the U.S. must do more to cut methane emissions from fossil fuel exploitation and other sectors to try and avoid reaching climate tipping points that could have disastrous implications.

Methane is a much more potent heat-trapping gas than carbon dioxide, but it only stays in the atmosphere for about 12 years, which means that big cuts could have a tangible short-term benefit in the race to cap global warming. Continue reading

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Study: Unchecked methane emissions from fossil fuel exploitation may push Earth past the climate tipping point

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FrackNation … but for how long?

Is natural gas really the lesser of two evils?

Staff Report

FRISCO — As frackers desperately try to pump every last bit of gas from the ground before the global warming clock runs out, scientists warn that methane emissions could push Earth over a climate tipping point in just a few years.

“We have to control methane immediately, and natural gas is the largest methane pollution source in the United States,” said Robert Howarth, greenhouse gas expert and ecology and environmental biology professor at Cornell University. “If we hit a climate-system tipping point because of methane, our carbon dioxide problem is immaterial. We have to get a handle on methane, or increasingly risk global catastrophe.” Continue reading

Environment: Deepwater Horizon blowout may have released 250,000 tons of natural gas into the atmosphere

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The massive Deepwater Horizon oll spill spreads a sheen across a huge section of the Gulf of Mexico in May 2010. Photo courtesy NASA.

Findings show value of long-term post-spill monitoring

Staff Report

FRISCO — Methane-munching microbes in the Gulf of Mexico may have been overwhelmed by the sheer volume of gas released during the 84-day Deepwater Horizon oil disaster in 2010.

“Most of the gas injected into the Gulf was methane, a potent greenhouse gas that contributes to global climate change, so we were naturally concerned that this potent greenhouse gas could escape into the atmosphere,” said University of Georgia researcher Samantha Joye.” Many assumed that methane-oxidizing microbes would simply consume the methane efficiently, but our data suggests that this isn’t what happened.” Continue reading

Colorado: Industry, state regulators consistently underestimate air pollution from oil and gas operations

The proliferation of oil and gas drilling in Colorado raises serious questions about water quality impacts. Photo courtesy SkyTruth.

The proliferation of oil and gas drilling in Colorado raises serious questions about air quality impacts. Photo courtesy SkyTruth.

New research show true magnitude of fossil fuel pollution along Front Range

Staff Report

FRISCO — Heat-trapping greenhouse gases and other air pollutants are leaking from Colorado oil and gas operations at a far higher rate than previously estimated.

Two days of aerial surveys showed methane leaking at three times the rate predicted by inventory estimates, and seven times as much benzene, a cancer-causing air toxic.Emissions of other chemicals that contribute to summertime ozone pollution were about twice as high as estimates, according to the new paper, accepted for publication in the American Geophysical Union’s Journal of Geophysical Research: Atmospheres. Continue reading

Climate: Wetlands seen as key source of methane

New study shows need for better monitoring

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Can you see the methane bubbling up? bberwyn photo.

Staff Report

FRISCO — Wetlands have been pinpointed as one of the largest sources of global methane emissions and new research shows that much more of the potent heat-trapping greenhouse gas will be pumped into the atmosphere as northern wetlands thaw and tropical ones warm, according to a new international study led by a University of Guelph researcher.

The study, published in Global Change Biology, is based on one of the largest-ever analyses of global methane emissions, with more than 20,000 field data measurements collected from 70 sites across arctic, temperate and tropical regions.

The results show the need for improved monitoring of wetlands and human changes to those ecosystems – a timely topic as the Intergovernmental Panel on Climate Change prepares to examine land use impacts on greenhouse gas emissions, according to Prof. Merritt Turetsky, lead author of the new study. Continue reading

Climate: Methane emissions from freshwater ecosystem set to soar as Earth warms

New study assesses freshwater methane on a global scale

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Microorganisms in freshwater ecosystems generate significant amounts of methane.

Staff Report

FRISCO — After recalculating Earth’s greenhouse gas budget, Princeton scientists say that methane emissions will start increasing at a faster pace than carbon dioxide, primarily due to the release of methane from microscopic freshwater organisms.

Methane is about 30 times more effective than CO2 at trapping the sun’s heat, and for every degree of warming, methane emissions will increase several times over, according to the research published in Nature.

Continue reading

Study: Methane emission estimates much too low

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America’s natural gas infrastructure has leakage issues.

Methane emissions from natural gas industry facilities and other sources may be up to 75 percent higher than EPA estimates

By Summit Voice

FRISCO — A comprehensive air quality analysis shows that most estimates of methane emissions from various sources — including the natural gas industry — are much too low, a result that didn’t surprise the scientists who led the study. Total U.S. methane emissions are probably about 25 to 75 percent higher than EPA estimates.

“People who go out and and actually measure methane pretty consistently find more emissions than we expect,” said the lead author of the new analysis, Adam Brandt, an assistant professor of energy resources engineering at Stanford University. “Atmospheric tests covering the entire country indicate emissions around 50 percent more than EPA estimates,” said Brandt. “And that’s a moderate estimate.” Continue reading

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