Greenland ice melt worse than previously believed

[Crick]

Ubiquitous acceleration in Greenland Ice Sheet calving from 1985 to 2022 - Nature

Analysis of more than 236,000 observations of glacier terminus positions shows that accelerated calving reduced the ice area of Greenland by about 5,000 km2 since 1985, producing over 1,000 Gt of freshwater that could influence ocean salinity and circulation.

www.nature.com

Abstract​

Nearly every glacier in Greenland has thinned or retreated over the past few decades1,2,3,4, leading to glacier acceleration, increased rates of sea-level rise and climate impacts around the globe5,6,7,8,9. To understand how calving-front retreat has affected the ice-mass balance of Greenland, we combine 236,328 manually derived and AI-derived observations of glacier terminus positions collected from 1985 to 2022 and generate a 120-m-resolution mask defining the ice-sheet extent every month for nearly four decades. Here we show that, since 1985, the Greenland Ice Sheet (GrIS) has lost 5,091 ± 72 km2 of area, corresponding to 1,034 ± 120 Gt of ice lost to retreat. Our results indicate that, by neglecting calving-front retreat, current consensus estimates of ice-sheet mass balance4,9 have underestimated recent mass loss from Greenland by as much as 20%. The mass loss we report has had minimal direct impact on global sea level but is sufficient to affect ocean circulation and the distribution of heat energy around the globe10,11,12. On seasonal timescales, Greenland loses 193 ± 25 km2 (63 ± 6 Gt) of ice to retreat each year from a maximum extent in May to a minimum between September and October. We find that multidecadal retreat is highly correlated with the magnitude of seasonal advance and retreat of each glacier, meaning that terminus-position variability on seasonal timescales can serve as an indicator of glacier sensitivity to longer-term climate change.

---

---

The more scientists study Greenland, the worse its ice melt looks

A new study found that the loss of ice has been underestimated, adding to a recent string of research that has drawn attention to rapid change in Greenland.

www.nbcnews.com

"
The study analyzed satellite images to track retreat and found that the breakup of icebergs has accelerated in Greenland and that previous analyses might have underrated its influence.

“Current consensus estimates of ice-sheet mass balance have underestimated recent mass loss from Greenland by as much as 20%,” the study’s authors wrote. In recent decades, almost every Greenland glacier has thinned or retreated.

The study, which was published Wednesday in the journal Nature, is yet another sign that Greenland’s ice is melting at hastening and concerning rates. Scientists are growing increasingly concerned that the Earth’s warming could trigger tipping points for major ice sheets. Greenland contains about 8% of the world’s freshwater. Its total melt would raise sea levels by almost 7 feet and could change ocean circulation patterns. "

 

[1srelluc]

Damn volcanos.

 

[protectionist]

Ubiquitous acceleration in Greenland Ice Sheet calving from 1985 to 2022 - Nature

Analysis of more than 236,000 observations of glacier terminus positions shows that accelerated calving reduced the ice area of Greenland by about 5,000 km2 since 1985, producing over 1,000 Gt of freshwater that could influence ocean salinity and circulation.

www.nature.com

Abstract​

Nearly every glacier in Greenland has thinned or retreated over the past few decades1,2,3,4, leading to glacier acceleration, increased rates of sea-level rise and climate impacts around the globe5,6,7,8,9. To understand how calving-front retreat has affected the ice-mass balance of Greenland, we combine 236,328 manually derived and AI-derived observations of glacier terminus positions collected from 1985 to 2022 and generate a 120-m-resolution mask defining the ice-sheet extent every month for nearly four decades. Here we show that, since 1985, the Greenland Ice Sheet (GrIS) has lost 5,091 ± 72 km2 of area, corresponding to 1,034 ± 120 Gt of ice lost to retreat. Our results indicate that, by neglecting calving-front retreat, current consensus estimates of ice-sheet mass balance4,9 have underestimated recent mass loss from Greenland by as much as 20%. The mass loss we report has had minimal direct impact on global sea level but is sufficient to affect ocean circulation and the distribution of heat energy around the globe10,11,12. On seasonal timescales, Greenland loses 193 ± 25 km2 (63 ± 6 Gt) of ice to retreat each year from a maximum extent in May to a minimum between September and October. We find that multidecadal retreat is highly correlated with the magnitude of seasonal advance and retreat of each glacier, meaning that terminus-position variability on seasonal timescales can serve as an indicator of glacier sensitivity to longer-term climate change.

---

---

The more scientists study Greenland, the worse its ice melt looks

A new study found that the loss of ice has been underestimated, adding to a recent string of research that has drawn attention to rapid change in Greenland.

www.nbcnews.com

"
The study analyzed satellite images to track retreat and found that the breakup of icebergs has accelerated in Greenland and that previous analyses might have underrated its influence.

“Current consensus estimates of ice-sheet mass balance have underestimated recent mass loss from Greenland by as much as 20%,” the study’s authors wrote. In recent decades, almost every Greenland glacier has thinned or retreated.

The study, which was published Wednesday in the journal Nature, is yet another sign that Greenland’s ice is melting at hastening and concerning rates. Scientists are growing increasingly concerned that the Earth’s warming could trigger tipping points for major ice sheets. Greenland contains about 8% of the world’s freshwater. Its total melt would raise sea levels by almost 7 feet and could change ocean circulation patterns. "

Maybe Obama might need to move out of his new oceanfront mansion in Martha's Vineyard.

 

[White 6]

Maybe Obama might need to move out of his new oceanfront mansion in Martha's Vineyard.

Could be. Main had fishing shacks 150 years old taken out by the high tide last week.

 

[Crick]

Damn volcanos.

Nope.

 

[Crick]

Maybe Obama might need to move out of his new oceanfront mansion in Martha's Vineyard.

Maybe you ought to learn what constitutes actual scientific evidence and what does not.

 

[protectionist]

Maybe you ought to learn what constitutes actual scientific evidence and what does not.

You wanna tell us ?

 

[Oddball]

How much more in taxes and how many freedoms do we need to have taken away to stop this?

 

[Crick]

You wanna tell us ?

Things like: atmospheric CO2 levels, global temperature, ocean heat content, sea level, ice mass balance at the poles, Greenland and the world's glaciers. Where President Obama lives doesn't mean Jack Shit. That you think it does tells me there's a good chance you're a right wing bigot.

 

[August West]

Maybe Obama might need to move out of his new oceanfront mansion in Martha's Vineyard.

OMG! He`s been gone for a long time but you`re still stalking him.

 

[DGS49]

There is no measurable rise in sea levels unless you cherry-pick the locations.

But the more fundamental question is never asked. "OK, let's suppose that Greenland's ice melting is a catastrophe. What can 'we' do about it?"

And the answer is NOTHING. Even if everyone in the U.S., Canada, and Western Europe parked their cars, adjusted their thermostats, and took up subsistence farming, it would have no impact on the earth's climate for the next hundred years. You could look it up.

Because the developing world and the third world (2/3 of the earth's population at least) will - and MUST - expand their use of fossil fuels massively in order to raise themselves up, collectively, to the modern era. That means coal-fired power plants, ICE-powered transportation, agricultural, and construction vehicles, and cooking on stoves powered by natural gas, or its equivalent.

We in the developed world will adapt to whatever happens to the climate. We always do. Sea walls will be built around Manhattan island, if necessary, populations will be moved, architecture will be adapted to a warming world. We will survive, nicely.

The faux panic is all about power. It is a campaign by the global Left to give Government total power over the means of production, so that they can control how we live. Joe Biden's ICE bans are just the nose of the camel, so to speak. Only idiots fail to see it.

 

[Mashmont]

Ubiquitous acceleration in Greenland Ice Sheet calving from 1985 to 2022 - Nature

Analysis of more than 236,000 observations of glacier terminus positions shows that accelerated calving reduced the ice area of Greenland by about 5,000 km2 since 1985, producing over 1,000 Gt of freshwater that could influence ocean salinity and circulation.

www.nature.com

Abstract​

Nearly every glacier in Greenland has thinned or retreated over the past few decades1,2,3,4, leading to glacier acceleration, increased rates of sea-level rise and climate impacts around the globe5,6,7,8,9. To understand how calving-front retreat has affected the ice-mass balance of Greenland, we combine 236,328 manually derived and AI-derived observations of glacier terminus positions collected from 1985 to 2022 and generate a 120-m-resolution mask defining the ice-sheet extent every month for nearly four decades. Here we show that, since 1985, the Greenland Ice Sheet (GrIS) has lost 5,091 ± 72 km2 of area, corresponding to 1,034 ± 120 Gt of ice lost to retreat. Our results indicate that, by neglecting calving-front retreat, current consensus estimates of ice-sheet mass balance4,9 have underestimated recent mass loss from Greenland by as much as 20%. The mass loss we report has had minimal direct impact on global sea level but is sufficient to affect ocean circulation and the distribution of heat energy around the globe10,11,12. On seasonal timescales, Greenland loses 193 ± 25 km2 (63 ± 6 Gt) of ice to retreat each year from a maximum extent in May to a minimum between September and October. We find that multidecadal retreat is highly correlated with the magnitude of seasonal advance and retreat of each glacier, meaning that terminus-position variability on seasonal timescales can serve as an indicator of glacier sensitivity to longer-term climate change.

---

---

The more scientists study Greenland, the worse its ice melt looks

A new study found that the loss of ice has been underestimated, adding to a recent string of research that has drawn attention to rapid change in Greenland.

www.nbcnews.com

"
The study analyzed satellite images to track retreat and found that the breakup of icebergs has accelerated in Greenland and that previous analyses might have underrated its influence.

“Current consensus estimates of ice-sheet mass balance have underestimated recent mass loss from Greenland by as much as 20%,” the study’s authors wrote. In recent decades, almost every Greenland glacier has thinned or retreated.

The study, which was published Wednesday in the journal Nature, is yet another sign that Greenland’s ice is melting at hastening and concerning rates. Scientists are growing increasingly concerned that the Earth’s warming could trigger tipping points for major ice sheets. Greenland contains about 8% of the world’s freshwater. Its total melt would raise sea levels by almost 7 feet and could change ocean circulation patterns. "

Antarctica set record high ice levels from 2013-15. Three straight years. And Antarctica is six times bigger than the Arctic Ice Shelf. NASA 'scientists' were dumbfounded and could offer no explanation.

There are no worries. We don't have to spend $150 trillion that the 'climate change experts' call for.

 

[eagle1462010]

 

[JGalt]

Does anyone else think "Greenland" is a stupid name for a country that's covered in ice?

I know the name "Iceland" is already taken, but they could have came up with a better name. Is that whole country inhabited by inbred reindeer-fucking morons, that they couldn't come up with a better name?

 

[Grumblenuts]

U.S. Supreme Court's right-wing supermajority appears ready to gut federal agency authority on environmental regulations and more; Social media sites profiting off of a new breed of climate denial, new study finds; PLUS: Frigid Arctic air strands drivers of both electric and gasoline vehicles... All that and more in today's Green News Report!

Click here to listen or download MP3 (6 mins)...

'Green News Report' - January 18, 2024

With Brad Friedman & Desi Doyen...

www.bradblog.com

 

[August West]

There is no measurable rise in sea levels unless you cherry-pick the locations.

But the more fundamental question is never asked. "OK, let's suppose that Greenland's ice melting is a catastrophe. What can 'we' do about it?"

And the answer is NOTHING. Even if everyone in the U.S., Canada, and Western Europe parked their cars, adjusted their thermostats, and took up subsistence farming, it would have no impact on the earth's climate for the next hundred years. You could look it up.

Because the developing world and the third world (2/3 of the earth's population at least) will - and MUST - expand their use of fossil fuels massively in order to raise themselves up, collectively, to the modern era. That means coal-fired power plants, ICE-powered transportation, agricultural, and construction vehicles, and cooking on stoves powered by natural gas, or its equivalent.

We in the developed world will adapt to whatever happens to the climate. We always do. Sea walls will be built around Manhattan island, if necessary, populations will be moved, architecture will be adapted to a warming world. We will survive, nicely.

The faux panic is all about power. It is a campaign by the global Left to give Government total power over the means of production, so that they can control how we live. Joe Biden's ICE bans are just the nose of the camel, so to speak. Only idiots fail to see it.

Only idiots ignore solid science or could it be that you just don`t care?

 

[protectionist]

Things like: atmospheric CO2 levels, global temperature, ocean heat content, sea level, ice mass balance at the poles, Greenland and the world's glaciers. Where President Obama lives doesn't mean Jack Shit. That you think it does tells me there's a good chance you're a right wing bigot.

"bigot" about what ?

 

[toobfreak]

Greenland ice melt worse than previously believed​

Good. I love fresh water. Soon, Greenland really will be green! Maybe Trump can build a resort there. Might be a good place to send all of the illegal aliens!

 

[protectionist]

Things like: atmospheric CO2 levels, global temperature, ocean heat content, sea level, ice mass balance at the poles, Greenland and the world's glaciers. Where President Obama lives doesn't mean Jack Shit. That you think it does tells me there's a good chance you're a right wing bigot.

I said "maybe" and "might".

And aren't you the one who was talking about the glaciers melting ? Sea levels rising.
Well, are they or arent they ?

 

[JGalt]

"bigot" about what ?

Greenies must be a race/religion/sex/ethnicity of their own or something.