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Methane Poses Climate Risk, Energy Opportunity

Posted May 29, 2008 9:09 AM

From Wired Top Stories:

Methane reserves deep in the ocean and in arctic permafrost might trigger runaway global warming. But they've also got the potential to provide huge amounts of power, a possibility that is attracting the interest of energy companies. Methane hydrate, a strange form of natural gas, has recently become a fascination for energy-hungry nations from the United States to Japan and India. Hydrate is found in oceans across the world, where the gas is trapped in icy structures below the seabed, and also lies beneath the Arctic's permafrost.

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Guru
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#1

Re: Methane Poses Climate Risk, Energy Opportunity

05/30/2008 5:42 AM

This was demonstrated here on TV in the UK by two British researchers travelling accross the Arctic tundra of Russia. Because of global-warming the perma-frost in these regions has started to melt, most of these rgions are frozen mashes or bogs!

They came accross a frozen lake where the ice had started to melt, and they drilled a hole in the ever thinning ice and set fire to the methane gas that was released, thus proving that the marshes contained a huge amount of methane- hydrate.

This is also happening in old land-fill sites all over the world, I even arranged for a Stirling engine to produce power and hot water from the methane from one site in Norway way back in 1987.

Spencer.

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Guru
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#2

Re: Methane Poses Climate Risk, Energy Opportunity

06/05/2008 3:32 AM

The Methane-containing deposits are actually Clathrates.

<...."The Clathrate Smoking Gun

Huge quantities of methane are held in ice-like structures in the cold northern bogs and the bottom of the seas. They are called clathrates (or cathrates). They are stable only in the cold or under high pressure. Methane is 24 times more potent a greenhouse gas than CO2.

The estimated amount of methane stored in these clathrates is gargantuan. They are the largest concentration of methane found on earth.

The compression of methane gas in clathrates is enormous. One cubic meter of clathrates brought to the ocean's surface releases 164 cubic meters of methane.

The possibility of violent methane degassing (or "burping") has been called the clathrate gun hypothesis. There is a suggestion that the ocean's bottom waters couldn't warm up to 8°C. If so, that would certainly set off massive clathrate destabilization. This is what turns the clathrates into a ticking time bomb.

These hydrates are already being released. Satellite photos show massive chimneys of methane bubbling off the ocean floor. They are subterranean versions of the gas field fires we saw during the first Gulf War in Kuwait.

Historically there are spikes in the methane record that may be explained by the violent degassing of clathrates. Some think that the Eocene hothouse period was caused by runaway global warming from clathrates released from the oceans.

The biggest of these catastrophes occurred at the end of the Permian period some 250 million years ago. More than 94% of all marine species in the fossil records suddenly disappeared as oxygen levels plummeted and life itself teetered on the edge of extinction. It took 20 million or more years for coral reefs to begin reestablishing themselves, and in some areas over 100 million years for ecosystems to reach their former healthy diversity.

Both were caused by temperature rises of less than 6½°C. Now these are average temperatures, but in the Siberian permafrost where much of the clathrates are buried the land is warming faster than anywhere else on earth.

None of this is reassuring, especially when we read what is happening to the permafrost boglands of Alaska and Siberia.....">

Once a huge Clathrate deposit is tapped, the potential for runaway Global Catastrophe is very high.

Kind Regards....

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