Methane in the news

The AGW hippies are so very worried about Methane as it has a significantly greater greenhouse potential than something as trivial as CO2. Since Methane is not a direct result of our economy, they are not looking at limiting its production. Which is a good thing as they would be in a lot of trouble if they tried... From Science News:

Methane-making microbes thrive under the ice
Microbes living under ice sheets in Antarctica and Greenland could be churning out large quantities of the greenhouse gas methane, a new study suggests.

In recent years scientists have learned that liquid water lurks under much of Antarctica's massive ice sheet, and so, they say, the potential microbial habitat in this watery world is huge. If the methane produced by the bacteria gets trapped beneath the ice and builds up over long periods of time -- a possibility that is far from certain -- it could mean that as ice sheets melt under warmer temperatures, they would release large amounts of heat-trapping methane gas.

Jemma Wadham, a geochemist at the University of Bristol in England, described the little-known role of methane-making microbes, called methanogens, below ice sheets on March 15 at an American Geophysical Union conference on Antarctic lakes.

Her team took samples from one site in Antarctica, the Lower Wright glacier, and one in Greenland, the Russell glacier. Trapped within the ice were high concentrations of methane, Wadham said, as well as methanogens themselves -- up to 10 million cells per gram in the Antarctic sample and 100,000 cells per gram in Greenland. That's comparable to the concentration of methanogens found in deep-ocean sediments, she said. The species of microbes were also similar to those found in other polar environments, such as Arctic peat or tundra.

The team then put scrapings from both sites into bottles and incubated them with water to see which microbes might grow. For the Antarctic samples, Wadham said, "nothing happens for 250 days and then bam! You get tons of methane." The Greenland samples haven't been growing for as long and so far don't show much signs of giving off methane -- but perhaps they just need more time, she reported at the meeting.

Other researchers have also recently found methanogens in icy settings. Mark Skidmore, a microbiologist at Montana State University in Bozeman, reported at the conference that his team has found methanogens in the Robertson glacier in the Canadian Rockies. "It underscores the importance of subglacial methanogenesis," Skidmore said.

The studies flesh out a picture of Antarctica as a much more dynamic and watery environment than the frozen, static one once envisaged. At least 386 lakes have been identified buried beneath the ice sheet, scientists from the University of Edinburgh reported at the meeting. Plans for major drilling projects are underway for several of them.

Since Methane is the simplest hydrocarbon by definition, maybe this is part of the cycle from which we get our petroleum. Wouldn't it be fun if our gasoline was constantly being produced by deep hot bacteria and that the earth was creating a limitless supply for us... Also explains the Methane Clathrates we keep finding.

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This page contains a single entry by DaveH published on April 22, 2010 9:06 PM.

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