Thawing Permafrost Wreaks Havoc in the Arctic

 

Care2 Earth Month: Back to Basics

This year, Care2 decided to expand Earth Day into Earth Month, since there is so much to explore when it comes to the environment. Every day in April, we’ll have a post about some of the most important topics for the environment, exploring and explaining the basics. It’s a great tool to help you get started with helping the environment or help explain it to others. See the whole series here.

In Northern Alaska, people don’t need to be convinced about climate change because they see it happening all around them and literally under them — the very ground is changing.

Each year, the sea ice gets thinner and arrives later. The lack of shore ice that used to protect them from storms is leading to some villages being moved inland. Fish species from warmer waters, new birds and new insects, like spruce bark beetles, which kill trees, are appearing.

Houses are built on stilts, to avoid melting the permafrost, a layer of frozen earth that begins about two feet beneath the surface and goes down, in North Alaska, some 2,000 feet. Some of those houses are collapsing. Roads which needed resurfacing once a decade because of melting permafrost are now being resurfaced every year. So-called ‘drunken forests‘ are appearing as trees start to keel over.

The ground is changing, melting and it could be a preview of our worst climate nightmare.

Globally, permafrost covers an area the area of the United States and Canada minus Texas. It holds an estimated 400 gigatons of methane, one of the greenhouse gases that is hastening the earth’s warming. As the permafrost thaws — which it has begun to do — lakes can drain away and the thawed soil can release billions of tons of methane into the atmosphere.

About half of the world’s underground organic carbon is found in northern permafrost regions. This is more than double the amount of carbon in the atmosphere in the form of the greenhouse gases carbon dioxide and methane.

Now scientists are using new satellite methods to track changes.

Although permafrost cannot be directly measured from space, factors such as surface temperature, land cover and snow parameters, soil moisture and terrain changes can be captured by satellites.

A February conference about the satellite measurements produced a number of animations showing disconcerting changes in freezing patterns and surface temperature over the arctic over several years.

· You can watch the animations here.

You can also watch another animation, which zooms in on the seasonal deformation of a track of land on Alaska’s North Slope during the summers of 2010 and 2011. Watch the red shift that signals the transformation of frozen ground into squishy muck — a meltdown that then subsides several centimeters as summer turns to fall.

The thaw which the satellites are detecting is already evident on the ground. In an article for the Smithsonian Magazine, Bob Reiss met Inuit Milton Noongwook. He is shown a series of large wooden boxes set deep into permafrost to store frozen walrus meat — winter food. Noongwook pulled aside a door and in the dark below Reiss sees hunks of meat amid a sheen of frost. But it was also wet down there. “It’s melting,” Milton said. “It never used to do that. If it gets too warm, the food will spoil.”

Greenhouse gases from permafrost have only been measured as a factor in global warming in the last few years. Currently, the estimate is that they will contribute to making warming happen up to a third faster. But this is only, as one scientist calls it, “a seat-of-the-pants expert assessment.”

Since 1970, the Arctic has warmed at a rate twice as fast as the rest of the globe, due to polar amplification. There is some evidence that the speed of temperature increases there is causing rapid change in the permafrost. A 2010 study found methane emissions rising by a third in just five years.

The good news? According to recent modeling work, if global emissions are cut rapidly and deeply enough to meet the world’s stated target of limiting the average global temperature rise to 2C above pre-industrial levels, the majority of the world’s permafrost will remain frozen.

 

Related Stories:

6 Ways To Combat Climate Change and Extreme Weather

Scientists Warn Climate Change May Be Irreversible

Climate Change Denial Research Funded By Big Oil

 

Location of permafrost in northern hemisphere image by Wikipedia

120 comments

Samantha Richardson

This is a truly terrifying article to read. Humanity better wake the hell up and DO SOMETHING about climate change, because if we can't come back from the brink of our own destruction, we will cause such devastating and irreficable climate chance.

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Mark Donners
Mark Donner6 years ago

Such an irony that in the ailing North, Canada's Harper and his minister thugs are doing everything in their power to peddle the dirtiest oil on earth, Alberta's tar sands, and are the only nation that sabotages global climate talks. Canada is not only the hypocrite nation but Harper is a traitor to Canada and a threat to humanity and Canada's sheeple will follow him right over the edge of the cliff while trying to take the entire world with them.

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federico bortoletto
federico b6 years ago

Grazie per le informazioni. Tutto ciò è molto triste.

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Sandy Erickson
Sandy Erickson6 years ago

The problem with our thinking today is that we believe that tomorrow will be the same as yeasterday for the rest of our lives. REALLY? The Earth has its own way of doing things and money can't really change it. We need to fit in or get out!

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Cate S.
Cate S6 years ago

I too find it astonishing that some people still reject the overwhelming evidence for climate change. It is so frustrating.

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Danuta Watola
Danuta W6 years ago

Thanks for the article!

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Joe R.
Joe R6 years ago

Thank you Care2.

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Sue Matheson
Sue Matheson6 years ago

thanks

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Vicki P.
Victoria P6 years ago

Thank-you for the article~♥

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Robert Hardy
Robert Hardy6 years ago

Yes you can count on governments and corporations making sure the permafrost stays frozen. Their dedication to keeping the World healthy is evident in everything they do.

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