Big U-turn: Key melting Greenland glacier is growing again

Big U-turn:  Key melting Greenland glacier is growing again
This 2016 photo provided by NASA shows patches of bare land at the Jakobshavn glacier in Greenland. The major Greenland glacier that was one of the fastest shrinking ice and snow masses on Earth is growing again, a new NASA study finds. The Jakobshavn glacier around 2012 was retreating about 1.8 miles (3 kilometers) and thinning nearly 130 feet (almost 40 meters) annually. But the last two years it started growing again at about the same rate, according to a study released on Monday, March 25, 2019, in Nature Geoscience. Study authors and outside scientists think this is temporary. (NASA via AP)

A major Greenland glacier that was one of the fastest shrinking ice and snow masses on Earth is growing again, a new NASA study finds.

The Jakobshavn (YA-cob-shawv-en) glacier around 2012 was retreating about 1.8 miles (3 kilometers) and thinning nearly 130 feet (almost 40 meters) annually. But it started growing again at about the same rate in the past two years, according to a study in Monday's Nature Geoscience . Study authors and outside scientists think this is temporary.

"That was kind of a surprise. We kind of got used to a runaway system," said Geological Survey of Denmark and Greenland ice and climate scientist Jason Box. "The good news is that it's a reminder that it's not necessarily going that fast. But it is going."

Box, who wasn't part of the study, said Jakobshavn is "arguably the most important Greenland glacier because it discharges the most ice in the northern hemisphere. For all of Greenland, it is king."

A natural cyclical cooling of North Atlantic waters likely caused the glacier to reverse course, said study lead author Ala Khazendar, a NASA glaciologist on the Oceans Melting Greenland (OMG) project. Khazendar and colleagues say this coincides with a flip of the North Atlantic Oscillation—a natural and temporary cooling and warming of parts of the ocean that is like a distant cousin to El Nino in the Pacific.

The water in Disko Bay, where Jakobshavn hits the ocean, is about 3.6 degrees cooler (2 degrees Celsius) than a few years ago, study authors said.

While this is "good news" on a temporary basis, this is bad news on the long term because it tells scientists that ocean temperature is a bigger player in glacier retreats and advances than previously thought, said NASA climate scientist Josh Willis, a study co-author. Over the decades the water has been and will be warming from man-made , he said, noting that about 90 percent of the heat trapped by greenhouse gases goes into the oceans.

"In the long run we'll probably have to raise our predictions of sea level rise again," Willis said.

Think of the temperatures near Greenland like an escalator that's rising slowly from global warming, Khazendar said. But the natural North Atlantic Oscillation sometimes is like jumping down a few steps or jumping up a few steps. The water can get cooler and have effects, but in the long run it is getting warmer and the melting will be worse, he said.

Four outside scientists said the study and results make sense.

University of Washington ice scientist Ian Joughin, who wasn't part of the study and predicted such a change seven years ago, said it would be a "grave mistake" to interpret the latest data as contradicting climate change science.

What's happening, Joughin said, is "to a large extent, a temporary blip. Downturns do occur in the stock market, but overall the long term trajectory is up. This is really the same thing."


Explore further

NASA's Greenland mission still surprises in year four

More information: Interruption of two decades of Jakobshavn Isbrae acceleration and thinning as regional ocean cools, Nature Geoscience (2019). DOI: 10.1038/s41561-019-0329-3 , https://www.nature.com/articles/s41561-019-0329-3
Journal information: Nature Geoscience

© 2019 The Associated Press. All rights reserved.

Citation: Big U-turn: Key melting Greenland glacier is growing again (2019, March 25) retrieved 17 September 2019 from https://phys.org/news/2019-03-big-u-turn-key-greenland-glacier.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
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Mar 25, 2019
Fire these deniers, clearly they are not aware of the message that needs to be spread to save us all from the Chicken Little scenarios.

tpb
Mar 25, 2019
"was retreating about 1.8 miles (3 kilometers) and thinning nearly 130 feet (almost 40 meters) annually. But it started growing again at about the same rate in the past two years"

So, they can state definitively that the warming was man made, but the cooling is natural.(sarc)

Mar 25, 2019
https://www.youtube.com/watch?v=AN0VHCirLMU
Its climate change. The glacier is changing. Im sure they know what theyre doing.

Mar 25, 2019
Climate Change, where the AGW Cult's "science" is FAKE and their LIES and BULLSHIT are REAL.

Mar 25, 2019
Confirmation bias apparently. When you are sure of something, all evidence confirms it.

Mar 25, 2019
Climate deniers seize on any minor change as "evidence." Quote "two years" end quote. Climate change happens over decades. Sorry, you're nearly an order of magnitude wrong.

Mar 25, 2019
What if it's the beginning of Mother Nature taking back control of her planet?

From the Nature Geoscience paper;
"We conclude that projections of Jakobshavn's future contribution to sea-level rise that are based on glacier geometry are insufficient, and that accounting for external forcing is indispensable."

Can anyone please explain what that means in real-people-speak?

Mar 25, 2019
Numerous facts support man-made climate change, but there will still be those who believe it's all a hoax and who will latch on to any ONE fact that supports their belief. Reminds me of those that see Jesus in a pancake shape or toasted bread. There in lies the self deceptive nature of belief, ignore deductive reasoning and critical thinking, and ignore all evidence except that which supports your own chosen position.

Mar 25, 2019
Numerous facts support man-made climate change, but there will still be those who believe it's all a hoax and who will latch on to any ONE fact that supports their belief. Reminds me of those that see Jesus in a pancake shape or toasted bread. There in lies the self deceptive nature of belief, ignore deductive reasoning and critical thinking, and ignore all evidence except that which supports your own chosen position.

I saw Madonna doing the Neutron Dance in my freshly mowed yard, once...
Changed my whole outlook on life....

Mar 25, 2019
NASA climate scientist Josh Willis, a study co-author. Over the decades the water has been and will be warming from man-made climate change, he said, noting that about 90 percent of the heat trapped by greenhouse gases goes into the oceans.

Watcha talkin bout Willis.
This is the same Josh Willis, who published the Argo data that confirmed the oceans were cooling, and got so much shit from the AGW Cult, he shamelessly proceeded to cook the data and conceal it from the public. He obviously hasn't stopped, since back then it was 80 percent, and now it's 90. Now that the growing glacier lays bare his deceit, he's forced into an even bigger lie.

Mar 25, 2019
What if it's the beginning of Mother Nature taking back control of her planet?

She never lost control. Humans are not even an itch that needs scratching.


From the Nature Geoscience paper;
"We conclude that projections of Jakobshavn's future contribution to sea-level rise that are based on glacier geometry are insufficient, and that accounting for external forcing is indispensable."

Can anyone please explain what that means in real-people-speak?

What that means, is that they are going from screaming -- "Look! The glacier is melting. We're all going to drown" - to whispering - "Shittt. Quick...we need some bigger lies".

Mar 26, 2019
Climate Change, where the AGW Cult's "science" is FAKE and their LIES and BULLSHIT are REAL.

YOU are dumber than a ROCK, showing NO ability whatsoever to learn or understand reality. Instead exposing your incompetency self inflicted, on a daily basis, and that have made you the very laughing stock of the physics forum.
Article after Article, more and more readers gets to see your stupidity.

Mar 26, 2019
What if it's the beginning of Mother Nature taking back control of her planet?

From the Nature Geoscience paper;
"We conclude that projections of Jakobshavn's future contribution to sea-level rise that are based on glacier geometry are insufficient, and that accounting for external forcing is indispensable."

Can anyone please explain what that means in real-people-speak?


That their original model was too simplistic, and they need to add in more factors external to the glacier itself. Not really a surprise, probably not even to the original researchers. Of course in order to make a better model you need better data, and it looks like they're gathering that now.

Mar 26, 2019
Climate deniers seize on any minor change as "evidence." Quote "two years" end quote. Climate change happens over decades. Sorry, you're nearly an order of magnitude wrong.

Good to put it out for the readers, the denier morons (mostly only antigoracle and his sown sockpuppets have no limits when it comes to pulling at straws and fooling himself about reality.

This Idiot.. get this after Decades can STILL not provide evidence for disproving Human Induced Climate Change, Yet he continues to absolutely Stupify himself, creating hilarious publicity for his kind. Comedy Gold could no get better than this.

Mar 26, 2019

She never lost control. Humans are not even an itch that needs scratching.

And there just shows the Moron's way of thinking, i think the ticks up in the trees his swinging has created too many itches, causing antisciencgorilla to go bonkers once again


What that means, is that they are going from screaming -- "Look! The glacier is melting. We're all going to drown" - to whispering - "Shittt. Quick...we need some bigger lies".

It means that you are yet still to come down from the trees and try identify what a book looks like, then actually formulate an idea as to how you would go about opening up the book, the reading part ? i'm not sure there will be teacher in the world to teach reading to you, as the only thing that closely resembles a word to you is a banana.

Mar 26, 2019
And we're morons for questioning global warming?

Fools.

Mar 26, 2019
Well...If after 2 decades your questioning produced absolutely zero evidence to the contrary and puts you into a never ending loop of insanity, Ya think Not ????... Sheez... it is like Einstein himself said, doing the same thing over and over again expecting a different result, you could do this for a billion years, Human Induced Climate change is just getting worse, The Deniers Will get whats coming, trying to deceive and Lie around every corner. Boldly and Without Conscious.

You are fools for Denying the Evidence and Denying Reality.

Mar 26, 2019
And we're morons for questioning global warming?

Fools.


Anyone who questions it is obviously one of the following:

(1) As you say, a fool, fooled by the anti-AGW propaganda and unable/unwilling to investigate and figure the truth out for themselves.
(2) A person with such an inflexible mindset that they are unable to face the obvious truth and will go to any lengths to continue to rationalize their set and outdated views.
(3) A PieceOfShit, someone with an ulterior motive, whatever it may be, they should be shot.

Mar 26, 2019
I wouldn't say they should be shot, but they should admit they are wrong with the intention to rectify their wrongs even though insurmountable damage has already been done to the earth yet there is hope to save the planet. Or they need to pay a dear price for boldly Denying Human Induced Climate Change, Boasting with such arrogance that i hardly doubt they'd even care if the earth turns desert..... Beyond Sickening.

Mar 26, 2019
"they need to pay a dear price for boldly Denying Human Induced Climate Change" - Science1st

Sorry bumpkin.,,, They aren't doing that. You are.

Mar 26, 2019
"And we're morons for questioning global warming?" - old c code

Yes

Mar 26, 2019
Liar... Liar... Pants on fire...

"Argo data that confirmed the oceans were cooling" - antiintelligence

Mar 26, 2019
https://www.youtube.com/watch?v=AN0VHCirLMU
Its climate change. The glacier is changing. Im sure they know what theyre doing
Shit man. I just realized my post was mangled and that vid was from another thread. ??

Mar 26, 2019
Stupid fcks, you people really are.

Mar 26, 2019
Koooooooook!

"AGW Cult's "science" is FAKE" - Antigoricle

Mar 26, 2019
This is really very, very, bad news........but I don't know why?

Mar 26, 2019
This is really very, very, bad news........but I don't know why?

Perhaps, because it's Unsettling Science for the AGW Cult.

Mar 27, 2019
This is really very, very, bad news........but I don't know why?

Perhaps, because it's Unsettling Science for the AGW Cult.
.....seems that way, if there is some REAL SCIENCE content they don't want to hear about it, they live their lives inside that consummate black hole from which the parameters of infinite gravity never allow a cogent thought to escape. Right Schniebo?

Mar 27, 2019
Trump gets vindicated , now they admit ice is growing , the climate is indeed changing !

Mar 28, 2019
Antigoracle's trope of socks above haggling it out amongst themselves... pure comedy LOL
Seems Snoose as always snoozes and Loses... ;)

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