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Topic: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release (Read 366 times) previous topic - next topic

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  • osmanthus
  • Administrator
  • Fingerer of piglets
Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release

Quote
Huge slabs of Arctic permafrost in northwest Canada are slumping and disintegrating, sending large amounts of carbon-rich mud and silt into streams and rivers. A new study that analyzed nearly a half-million square miles in northwest Canada found that this permafrost decay is affecting 52,000 square miles of that vast stretch of earth--an expanse the size of Alabama.

According to researchers with the Northwest Territories Geological Survey, the permafrost collapse is intensifying and causing landslides into rivers and lakes that can choke off life downstream, all the way to where the rivers discharge into the Arctic Ocean.

Similar large-scale landscape changes are evident across the Arctic including in Alaska, Siberia and Scandinavia, the researchers wrote in a paper published in the journal Geology in early February. The study didn't address the issue of greenhouse gas releases from thawing permafrost. But its findings could help quantify the immense global scale of the thawing, which will contribute to more accurate estimates of carbon emissions.

Permafrost is land that has been frozen stretching back to the last ice age, 10,000 years ago. As the Arctic warms at twice the global rate, the long-frozen soils thaw and decompose, releasing the trapped greenhouse gases into the air. Scientists estimate that the world's permafrost holds twice as much carbon as the atmosphere.

The new study was aimed at measuring the geographical scope of thawing permafrost in northwest Canada. Using satellite images and other data, the team studied the edge of the former Laurentide Ice Sheet, a vast expanse of ice that covered two-thirds of North America during the last ice age. The disintegration of the permafrost was visible in 40- to 60-mile wide swaths of terrain, showing that, "extensive landscapes remain poised for major climate-driven change."

"Things have really taken off. Climate warming is now making that happen. It's exactly what we should expect with climate change," said Steven V. Kokelj, lead scientist on the Canadian mapping project. "And the maps that we produced clearly indicated it's not just a random pattern. We're sort of connecting dots here for the scientific community."
The paper is open access, BTW.
Truth is out of style

  • borealis
  • Administrator
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #1
 :sadyes:

  • Peez
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #2
Yabut... it was really cold in Montreal yesterday, so scientists are not infallable and Chinese conspiracy and cow farting and global climate cycles and liberal naivite and... and...

  • F X
  • The one and only
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #3
Jesus Christ
"If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man."
― Mark Twain 🔭

Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #4
Jesus Christ
How far does this conspiracy of fake news extend, FX?

Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #5
You tell us Alan.  When this particular nugget of anti-scientific nonsense is no longer in the 'news' and it's back to shellfish dissolving in acid oceans.

  • F X
  • The one and only
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #6
Yabut... it was really cold in Montreal yesterday, so scientists are not infallable and Chinese conspiracy and cow farting and global climate cycles and liberal naivite and... and...
And you are a fucking idiot
"If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man."
― Mark Twain 🔭

Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #7
:staregonk:  Imagine how awful it must have been during the Holocene Optima  or the Minoan, Roman and Medieval warm periods!  Oh wait - it wasn't.

Imagine how all of those warm periods were driven by the devil gas carbon dioxide.  Oh wait - they weren't.

Wake the fuck up.

Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #8
:staregonk:  Imagine how awful it must have been during the Holocene Optima  or the Minoan, Roman and Medieval warm periods!  Oh wait - it wasn't.

Imagine how all of those warm periods were driven by the devil gas carbon dioxide.  Oh wait - they weren't.

Wake the fuck up.
Look at all these fallacies.
"At least you can fucking die and leave North Korea." - Christopher Hitchens

  • Peez
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #9
Yabut... it was really cold in Montreal yesterday, so scientists are not infallable and Chinese conspiracy and cow farting and global climate cycles and liberal naivite and... and...
And you are a fucking idiot

You are too kind.

Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #10
And perceptive.

  • F X
  • The one and only
Re: Massive Permafrost Thaw Documented in Canada, Portends Huge Carbon Release
Reply #11
If permafrost starts increasing, that too will be blamed on global warming
"If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man."
― Mark Twain 🔭