In the past few days, the researchers have seen areas of sea foaming with gas bubbling up through “methane chimneys” rising from the sea floor. They believe that the sub-sea layer of permafrost, which has acted like a “lid” to prevent the gas from escaping, has melted away to allow methane to rise from underground deposits formed before the last ice age.

They have warned that this is likely to be linked with the rapid warming that the region has experienced in recent years.

Methane is about 20 times more powerful as a greenhouse gas than carbon dioxide and many scientists fear that its release could accelerate global warming in a giant positive feedback where more atmospheric methane causes higher temperatures, leading to further permafrost melting and the release of yet more methane.

And what does Jeanette have to say?

We won’t fix this one by changing light bulbs. It’s really, really scary.

That pretty much sums it up. The scientists have reported that at some locations, the methane release is 100 times normal background levels, so this is a meltdown significantly greater than business as usual.

The Arctic region as a whole has seen a 4C rise in average temperatures over recent decades and a dramatic decline in the area of the Arctic Ocean covered by summer sea ice. Many scientists fear that the loss of sea ice could accelerate the warming trend because open ocean soaks up more heat from the sun than the reflective surface of an ice-covered sea.

It is truly disturbing that such an important indicator of anthropogenic global warming gets such short shrift in the main stream media. We should be responding as if our lives depended on it. Because they do. tick. tick. tick. tick…

The Independent reports:

The defence of “lawful excuse” under the Criminal Damage Act 1971 allows damage to be caused to property to prevent even greater damage – such as breaking down the door of a burning house to tackle a fire.

The not-guilty verdict, delivered after two days and greeted with cheers in the courtroom, raises the stakes for the most pressing issue on Britain’s green agenda and could encourage further direct action.

Kingsnorth was the centre for mass protests by climate camp activists last month. Last year, three protesters managed to paint Gordon Brown’s name on the plant’s chimney. Their handi-work cost £35,000 to remove.

I wonder if the Ploughshares folk who knocked out the Waihopai dome will try the same tactic in court. It seems there may be a legal precedent…

The campaigners had a prominent ally who turned up to testify on their behalf:

During the eight-day trial, the world’s leading climate scientist, Professor James Hansen of Nasa, who had flown from American to give evidence, appealed to the Prime Minister personally to “take a leadership role” in cancelling the plan and scrapping the idea of a coal-fired future for Britain.

Professor Hansen, who first alerted the world to the global warming threat in June 1988 with testimony to a US senate committee in Washington, and who last year said the earth was in “imminent peril” from the warming atmosphere, asserted that emissions of CO2 from Kings-north would damage property through the effects of the climate change they would help to cause.

The acquittal was the second time in a decade that the “lawful excuse” defence has been successfully used by Greenpeace activists. In 1999, 28 Greenpeace campaigners led Lord Melchett, who was director at the time, were cleared of criminal damage after trashing an experimental field of GM crops in Norfolk. In each case the damage was not disputed – the point at issue was the motive.

A conservative parliamentary candidate also testified on their behalf. If Greenpeace can get prominent scientists and politicians to turn up to their trial, I wonder who the Ploughshares folk could get to testify on their behalf?