Study suggests Arctic permafrost melting faster than thought


spaminator
#1
Study suggests Arctic permafrost melting faster than thought
Canadian Press
Published:
May 2, 2019
Updated:
May 2, 2019 8:08 AM EDT
In this undated photo, abrupt permafrost melting has caused a large landslide into a side channel of the Mackenzie River in the Northwest Territories. Permafrost in some areas of the Canadian Arctic is melting so fast that it's gulping up the equipment left there to study it.Carolyn Gibson / THE CANADIAN PRESS
Permafrost in some areas of the Canadian Arctic is melting so fast that it’s gulping up the equipment left there to study it.
“The ground thaws and swallows it,” said Merritt Turetsky, a University of Guelph biologist whose new research warns the rapid melt could dramatically increase the amount of greenhouse gases released from ancient plants and animals frozen within the tundra.
“We’ve put cameras in the ground, we’ve put temperature equipment in the ground, and it gets flooded. It often happens so fast we can’t get out there and rescue it.
“We’ve lost dozens of field sites. We were collecting data on a forest and all of a sudden it’s a lake.”
Turetsky’s research, published this week in the journal Nature, looks at the rate of permafrost melt across the Arctic and what its impact could be on attempts to limit greenhouse gas emissions that cause climate change.
Story continues below
It’s been known for years that the vast belts of frozen soil that underlie much of the North are thawing as the Arctic warms. That releases greenhouse gases as organic carbon from plants and animals, once locked away in the ice, melts and decomposes.
Climate scientists have assumed a slow, steady erosion of permafrost and a similar pace of carbon release. Turetsky and her colleagues found something different.
Instead of a few centimetres of melt a year, several metres of soil can destabilize within days. Landscapes collapse into sinkholes. Hillsides slide away to expose deep permafrost that would otherwise have remained insulated.
“Permafrost at (that) depth, even one hundred years from now, probably would still be protected in the soil,” she said. “Except here comes this really crazy liquefication where this abrupt thaw really churns up this stuff.”
Wildfires, becoming larger and hotter every year over the Canadian boreal forest, are also causing rapid permafrost melt.
Nearly one-fifth of Arctic permafrost is now vulnerable to rapid warming, Turetsky’s paper suggests. Plenty of it is in Canada, such as in the lowlands south of Hudson Bay.
Soil analysis found those quickly melting areas also contain the most carbon. Nearly 80 per cent of them hold at least 70 kilograms of carbon per cubic metre.
That suggests permafrost is likely to release up to 50 per cent more greenhouse gases than climate scientists have believed. As well, much of it will be released as methane, which is about 30 per cent more efficient at trapping heat than carbon dioxide.
“These are minimum estimates,” Turetsky said. “We’ve been very conservative.”
Despite the rapid melt, it’ll be decades before the extra carbon release starts to influence global climate. “We’ve got a bit of time.”
The abrupt collapsing of permafrost, however, will affect northerners long before that.
“The landscape is going to be affected more and more every year by permafrost degradation,” Turetsky said.
“We’ve got a lot of people living on top of permafrost and building infrastructure on top of permafrost. It’s enough to sink northern budgets.”

http://youtube.com/watch?v=85TqNEmleOg
http://torontosun.com/news/national/...r-than-thought
 
Cliffy
#2
I notice that the climate deniers are avoiding this thread.
 
darkbeaver
+1
#3
Undated photo! and melting in SOME areas? The earths climate changes on a constant cyclical basis ,you seem to be in denial about that fact Cliffy. The paper is pure alarmist crap. Arctic ice has been building for three years and a bit. Tell us about the starving polar bears again.
 
Curious Cdn
#4
Oh, man!

It's frozen Mastadon shit forty feet down, up there.
 
petros
+3
#5  Top Rated Post
Quote: Originally Posted by darkbeaver View Post

Undated photo! and melting in SOME areas? The earths climate changes on a constant cyclical basis ,you seem to be in denial about that fact Cliffy. The paper is pure alarmist crap. Arctic ice has been building for three years and a bit. Tell us about the starving polar bears again.

Exposed river bank is melting. River banks never eroded until just recently. It's a fact.
 
MHz
#6
Quote: Originally Posted by spaminator View Post

Anybody care to explain where the island that saved the rest of the valley came from??
Anybody put some of the thawed material in a blender and strain it (or not) and sell it as 'pop'?? The new bugs alone will kill off anything that is killing our body today. Tundra is made from herbs and spices after all and we have enough the we could share, for a modest delivery fee that is.
 
MHz
#7
Quote: Originally Posted by petros View Post

It's a fact.

Of course it is Dear.

Guards this one is probably armed, use appropriate measures.
 
Walter
+1 / -1
#8
Quote: Originally Posted by petros View Post

Exposed river bank is melting. River banks never eroded until just recently. It's a fact.

Yeah, the Grand Canyon wasn't there last year.
 
Curious Cdn
#9
Quote: Originally Posted by Walter View Post

Yeah, the Grand Canyon wasn't there last year.

It's a mile down to igneous rock there but Petros declared that I was a fool and a nave to suggest that the same thing was true here.

He's an all-purpose expert, though so I suppose that it wasn't there last year.
 
Twin_Moose
+2
#10
Quote: Originally Posted by Cliffy View Post

I notice that the climate deniers are avoiding this thread.

Pretty amazing forest for Tundra there Cliffy, Trees don't grow in frozen ground
 
darkbeaver
+3
#11
Quote: Originally Posted by Twin_Moose View Post

Pretty amazing forest for Tundra there Cliffy, Trees don't grow in frozen ground


No one is mentioning the mid western US flooding disaster. The bread basket of the continent is soaking wet and will be under flood until mid may at least is the bet. And it has fuk all to do with CO2 or global whorming. Every bread slice will be reduced to eight millimeters and the price per loaf will double.
 
Curious Cdn
#12
Quote: Originally Posted by Twin_Moose View Post

Pretty amazing forest for Tundra there Cliffy, Trees don't grow in frozen ground

Gee, I wonder if we have any of that mysterious "tundra" stuff north of the tree line?

BTW, I saw all sorts of trees growing over the permafrost along the Dempster Highway, which is constructed on a big gravel frost pad.
 
petros
+3
#13
Quote: Originally Posted by darkbeaver View Post

No one is mentioning the mid western US flooding disaster. The bread basket of the continent is soaking wet and will be under flood until mid may at least is the bet. And it has fuk all to do with CO2 or global whorming. Every bread slice will be reduced to eight millimeters and the price per loaf will double.

You have to go back 107 years to find a colder October-April in North America.
 
Walter
+2 / -1
#14
Quote: Originally Posted by petros View Post

You have to go back 107 years to find a colder October-April in North America.

Don't confuse the issue with facts.
 
Hoid
#15
Quote: Originally Posted by darkbeaver View Post

No one is mentioning the mid western US flooding disaster. The bread basket of the continent is soaking wet and will be under flood until mid may at least is the bet. And it has fuk all to do with CO2 or global whorming. Every bread slice will be reduced to eight millimeters and the price per loaf will double.

bread is bad for you anyway.
 
Twin_Moose
+2
#16
Quote: Originally Posted by Curious Cdn View Post

Gee, I wonder if we have any of that mysterious "tundra" stuff north of the tree line?
BTW, I saw all sorts of trees growing over the permafrost along the Dempster Highway, which is constructed on a big gravel frost pad.

Goes to show warming happens in the Tundra all the time, roots cannot grow in frozen ground period.
 
petros
+3
#17
The 200 year old 8ft tall spruce on the treeline aren't creeping any further north.
 
Twin_Moose
+2
#18
Well the Arctic is ice free maybe the trees will start re growing again LOl
 
MHz
#19
Quote: Originally Posted by petros View Post

The 200 year old 8ft tall spruce on the treeline aren't creeping any further north.

They sink once the weigh so much. How many sticks float in that upright position?? Perhaps if they were to adapt to growing sideways to the sun instead . . .


Like in the photo below rather than the stupid explanation they give, the tree is falling over, period.


https://www.soils4teachers.org/tundra
Tundra Soils

Welcome to the oft frozen tundra (and no, not the Green Bay Packer Kind).

The tundra is a very unique landscape, with freezing and thawing creating unique patterns in the ground. During the summer, water can accumulate underground, then freeze, which drives the soil upward into a small hill call a Pingo.

Climate of the Tundra



Tundra soils are formed at high latitudes. It is usually very cold in the tundra. Tundra soils are generally frozen, and are classifed as Gelisols (think Gelato!).
In order to be a Gelisol, permafrost needs to be within 100 cm of the soil surface. These soils freeze and thaw a lot, making the soil heave and buckle (cryoturbation), like a mixter does to cookie dough. This creates trees at funny angles (shown above), and can generate a lot of building issues.
Organisms

Did you know that the largest portion of soil organic matter in the world is located in the tundra? This makes it vital to the carbon cycle. Though this seems contradictory to most, how can soils hold so much organic matter if they are so cold? Well, these regions are too cold for the decomposition of organic matter, so all of the living things stay trapped in the soil. There are many different varieties of mosses, lichens, shrubs and trees, and animals that call the tundra home.
Last edited by MHz; 2 weeks ago at 01:44 PM..
 
MHz
#20
Quote: Originally Posted by Hoid View Post

bread is bad for you anyway.

Try adding some opium to it and see the rowdy bar turn into a chess meet. 'A round of sandwiches for me and my friends.' Barkey.
 
petros
+1
#21
Quote: Originally Posted by MHz View Post

They sink once the weigh so much. How many sticks float in that upright position?? Perhaps if they were to adapt to growing sideways to the sun instead . . .
Like in the photo below rather than the stupid explanation they give, the tree is falling over, period.
https://www.soils4teachers.org/tundra
Tundra Soils
Welcome to the oft frozen tundra (and no, not the Green Bay Packer Kind).

The tundra is a very unique landscape, with freezing and thawing creating unique patterns in the ground. During the summer, water can accumulate underground, then freeze, which drives the soil upward into a small hill call a Pingo.

Climate of the Tundra

Tundra soils are formed at high latitudes. It is usually very cold in the tundra. Tundra soils are generally frozen, and are classifed as Gelisols (think Gelato!).
In order to be a Gelisol, permafrost needs to be within 100 cm of the soil surface. These soils freeze and thaw a lot, making the soil heave and buckle (cryoturbation), like a mixter does to cookie dough. This creates trees at funny angles (shown above), and can generate a lot of building issues.
Organisms
Did you know that the largest portion of soil organic matter in the world is located in the tundra? This makes it vital to the carbon cycle. Though this seems contradictory to most, how can soils hold so much organic matter if they are so cold? Well, these regions are too cold for the decomposition of organic matter, so all of the living things stay trapped in the soil. There are many different varieties of mosses, lichens, shrubs and trees, and animals that call the tundra home.

Ever been there?
 
darkbeaver
+2
#22
Quote: Originally Posted by petros View Post

You have to go back 107 years to find a colder October-April in North America.


When we compare agricultural history to solar cycles we get a minimum picture, plague can,t be far behind, followed by war, desperate for sun Norsemen looking for some civilization to eat. Eight months of winter, the other four will be unevenly divided. Boston is close at hand where I am, someday the entire east coast of Canada will plunder these cosmopolitan feeders. It, s nothing personal it,s just climate advised human evolution. You warm fat people won,t feel a thing. Yall better hope the globe is warming. The Church of Global Warming Disaster spoken of, in Revelations maybe.


Hey Petros, I, m quite sure there is hunger on the way. The Climate of this planet is maintained, adjusted, attuned, obeidiant, to the cosmic electrical circuit, there,s going to be a slight diminuation of electricity comming to these parts of this galaxy, hense the need for invasion and conquest of theses near and subtropical regions, Where will we get the tanks? What Canada needs nay demands is revolution. What should we break away frum? Ottawa has a big problem looming on the horizon. Nova Scotia built Canada/Kanata, and we kin tear it down we own the eastern seaboard. What I,m suggesting is that Nova Scotia don,t need the rest of Canada, we can live on cod. The rest of this country has nothing to add to the splenderous existance in Nova Scotia asociated with the seconde biggest ocean on the world. Agriculture or Death. same old story
 
Curious Cdn
#23
Muskeg with frost heaves innit ...

Makes me itch just looking at it. (The blackflies are already carrying off little children to the North of here.)

http://youtu.be/qjLBXb1kgMo
 
petros
+1
#24
Quote: Originally Posted by darkbeaver View Post

When we compare agricultural history to solar cycles we get a minimum picture, plague can,t be far behind, followed by war, desperate for sun Norsemen looking for some civilization to eat. Eight months of winter, the other four will be unevenly divided. Boston is close at hand where I am, someday the entire east coast of Canada will plunder these cosmopolitan feeders. It, s nothing personal it,s just climate advised human evolution. You warm fat people won,t feel a thing. Yall better hope the globe is warming. The Church of Global Warming Disaster spoken of, in Revelations maybe.
Hey Petros, I, m quite sure there is hunger on the way. The Climate of this planet is maintained, adjusted, attuned, obeidiant, to the cosmic electrical circuit, there,s going to be a slight diminuation of electricity comming to these parts of this galaxy, hense the need for invasion and conquest of theses near and subtropical regions, Where will we get the tanks? What Canada needs nay demands is revolution. What should we break away frum? Ottawa has a big problem looming on the horizon. Nova Scotia built Canada/Kanata, and we kin tear it down we own the eastern seaboard. What I,m suggesting is that Nova Scotia don,t need the rest of Canada, we can live on cod. The rest of this country has nothing to add to the splenderous existance in Nova Scotia asociated with the seconde biggest ocean on the world. Agriculture or Death. same old story

I asked this question of Cliffy:"How will a war over renewables be different than a war over oil?"
 
Curious Cdn
#25
Quote: Originally Posted by petros View Post

I asked this question of Cliffy:"How will a war over renewables be different than a war over oil?"

It's a lot more dangerous, for one thing. You can get cancer awhile wrangling stolen windmills, for instance.