by Jonathan Benson

December 22, 2011

from NaturalNews Website

When a Russian team recently stumbled upon a few methane "fountains" releasing large amounts of methane gas from shallow arctic waters directly into the atmosphere, they had no idea that there were hundreds, if not thousands, more.

The UK's Daily Mail reports that the Russian research vessel Academician Lavrentiev has identified at least 100 large methane plumes in the East Siberian Arctic Shelf that are releasing high amounts of the methane gas into the environment.

"We found more than 100 fountains, some more than a kilometer (just over three-fifths of a mile) across," said Dr. Igor Semiletov, who was involved in the discovery.

 

"These are methane fields on a scale not seen before. The emissions went directly into the atmosphere."

Under normal circumstances, methane leaks deep in the ocean oxidize long before they reach the surface.

Microbes in both marine and freshwater sediments convert methane into carbon dioxide on its way up to the ocean surface. But since the area where the methane fountains have been discovered is in relatively shallow water, there is not enough time for this conversion to take place.

According to the National Science Foundation (NSF), methane gas is 30 times more potent, gram for gram, than carbon dioxide in affecting the climate.

If true, this means that continuous, high-level releases of this gas from melting "permafrost" under the sea has the potential to rapidly alter normal climate conditions - and there really is nothing anyone can do about it.

"Earlier we found torch or fountain-like structures like this," added Semiletov about prior methane release discoveries in the area. "This is the first time that we've found continuous, powerful and impressive seeping structures, more than 1,000 meters (about 3,280 feet) in diameter. It's amazing."

On the flip side, some question the validity of the theory that methane contributes to climate change on any significant level, alleging that, like carbon dioxide, it is not much of a threat to the planet.

Research conducted by Dr. Joel Kauffman, Emeritus Professor of Chemistry at The University of the Sciences in Philadelphia, for instance, actually found that methane is not really the active "greenhouse gas" that some claim it is.

 

-   A Greenhouse Gas 30 times More Potent Than Carbon Dioxide   -

'Fountains' of Methane

...1,000m Across Erupt from Arctic Ice

13 December 2011

from DailyMail Website
 

The Russian research vessel Academician Lavrentiev conducted a survey of 10,000 square miles of sea off the coast of eastern Siberia.

They made a terrifying discovery - huge plumes of methane bubbles rising to the surface from the seabed.

'We found more than 100 fountains, some more than a kilometer across,' said Dr Igor Semiletov, 'These are methane fields on a scale not seen before. The emissions went directly into the atmosphere.'

Far East Siberia

The melting of 'permafrost' under the sea has led

to huge releases of methane - far more abrupt and intense than anything on land
 

Earlier research conducted by Semiletov's team had concluded that the amount of methane currently coming out of the East Siberian Arctic Shelf is comparable to the amount coming out of the entire world’s oceans.

Now Semiletov thinks that could be an underestimate.

The melting of the arctic shelf is melting 'permafrost' under the sea, which is releasing methane stored in the seabed as methane gas. These releases can be larger and more abrupt than any land-based release.

The East Siberian Arctic Shelf is a methane-rich area that encompasses more than 2 million square kilometers of seafloor in the Arctic Ocean.

Methane bubbles trapped in ice

Normally, bubbles from the seabed turn into carbon dioxide before reaching the surface,

but the East Siberian Arctic Shelf is so shallow the methane travels directly into the atmosphere

'Earlier we found torch or fountain-like structures like this,' Semiletov told the Independent. 'This is the first time that we've found continuous, powerful and impressive seeping structures, more than 1,000 meters in diameter. It's amazing.'

'Over a relatively small area, we found more than 100, but over a wider area, there should be thousands of them.'

Semiletov's team used seismic and acoustic monitors to detect methane bubbles rising to the surface.

Scientists estimate that the methane trapped under the ice shelf could lead to extremely rapid climate change. Current average methane concentrations in the Arctic average about 1.85 parts per million, the highest in 400,000 years. Concentrations above the East Siberian Arctic Shelf are even higher.

The shelf is shallow, 50 meters or less in depth, which means it has been alternately submerged or above water, depending on sea levels throughout Earth’s history.

During Earth’s coldest periods, it is a frozen arctic coastal plain, and does not release methane.

As the planet warms and sea levels rise, it is inundated with seawater, which is 12-15 degrees warmer than the average air temperature.

In deep water, methane gas oxidizes into carbon dioxide before it reaches the surface. In the shallows of the East Siberian Arctic Shelf, methane simply doesn’t have enough time to oxidize, which means more of it escapes into the atmosphere.

That, combined with the sheer amount of methane in the region, could add a previously uncalculated variable to climate models.