Ancient Antarctic ice sheet collapse could happen again, triggering a new global flood

Antarctic
Credit: CC0 Public Domain

It's happened before, and it could happen again.

Tens of thousands of years ago, a giant in Antarctic melted, raising sea levels by up to 30 feet around the world. This inundated huge swaths of what had been dry land. Scientists think it could happen again as the world heats up because of man-made , new research suggests.

Such a collapse would again cause seas to rise dramatically, which would lead to a global flood.

Researchers led by geologist Anders Carlson of Oregon State University said the ice disappeared about 125,000 years ago under that were similar to today's.

If future research confirms this finding, "the West Antarctic ice sheet might not need a huge nudge to budge," Jeremy Shakun, a paleoclimatologist at Boston College told Science magazine. That, in turn, means "the big uptick in observed there in the past decade or two is perhaps the start of that process rather than a short-term blip."

And once the ancient ice sheet melt got started, things got out of hand rather quickly. Global ocean waters may have risen as fast as 8 feet per century, a blink of an eye in climatological terms.

To do their research, Carlson's team examined several marine sediment cores taken offshore of Antarctica. The cores are long cylinders of mud and silt that give clues about past changes in Earth's climate.

Obviously, climate change 125,000 years ago was natural, not human caused as it is today.

Scientists speculate that a slight change in Earth's orbit and created in the Northern Hemisphere, which caused climate changes around the world, Nathaelle Bouttes at the National Centre for Atmospheric Science in the U.K. told Smithsonian magazine.

The research was announced earlier in December at a meeting of the American Geophysical Union in Washington, D.C.

Some of the process is well underway: Global warming has caused over 3 trillion tons of ice to melt from Antarctica in the past quarter-century and tripled ice loss there in the past decade, a study released in June said.

That total is equivalent to more than 2 quadrillion gallons of water added to the world's oceans, making Antarctica's melting ice sheets one of the largest contributors to rising sea levels. That amount of water is enough to fill more than a billion swimming pools and cover Texas to a depth of nearly 13 feet.

Overall, scientists say the melting ice in Antarctica is responsible for about one-third of all sea-level rise around the world.


Explore further

Ozone depletion increases Antarctic snowfall, partially mitigates ice sheet loss

More information: Paul Voosen. Antarctic ice melt 125,000 years ago offers warning, Science (2018). DOI: 10.1126/science.362.6421.1339

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Dec 21, 2018
The infrastructural repair costs for old coastal cities will cost so much they won't be worth doing. Let them flood. Move people inland.

Dec 21, 2018
The infrastructural repair costs for old coastal cities will cost so much they won't be worth doing. Let them flood. Move people inland.

It's fun to think about a future where there is no shipping, no chemical plants, no nuclear power, no industry, and no housing for probably 1/2 of humanity.

If only there was something we could have done, before the disaster started... hmmm...

Dec 21, 2018
If the world population grows by a quarter of a percent each year for 2000 years we will have over one trillion people on earth. Obviously this is not sustainable and obviously there will be many horrible things happening due to over population. Predicting what will happen exactly is impossible. The only thing to do is adjust to the situations as they occur. One cannot plan for the 1000 different problems that could occur. All we can do is adjust to the ones that do occur.

Dec 21, 2018
The long range icing and melting cycles are so difficult to see up close. All of human written history is reflective of the melting of our most recent ice age, just 10,000 years ago. I wonder how much of our human history lies beneath 300ft of coastal water. Probably most of it.

Next Ice Age will reduce humans down to 2-3 Billion, it will be a good reset unless we destroy each other with advanced weapons during the process.

Dec 21, 2018
The people not from earth that hide under that ice sheet will have to move. or publicly and not privately make themselves known to us. We also may get the opportunity, if they let us, study the fossil fauna and flora heretofor buried there. They me even cooperate in tech exchange. Our Earth has been attacked before from space, probably other people looking for the under ice dwellers. Who knows thay may have been earth's prior children as it were, or refugees from Mars when it was atttacked. Our system is a rich place to mine and many may want it. And they do not use litespd commo.....too shaggin' slow, which is why our radio listeners come up empty. ALL Earth's children will have to share teck for us all to survive. And Delirium Tremens Donalds in political power in large nations here do not help us as we NEED unity.

Dec 21, 2018
NOAA [AH] help save us from the flood ! Lets build the Arc !

Dec 21, 2018
"Ancient Antarctic ice sheet collapse could happen again, triggering a new global flood"

-thereby opening up wonderful new real estate investment opportunities, freeing prime lenders to print and issue $trillions, and providing a great excuse to abandon obsolete coastal infrastructure rather than continue to patch and cobble it to meet modern demands and accommodate state of the art technologies!

Thank you mother nature for your long term natural climate cycles! We love you as much as you love us.

Dec 21, 2018
The next ice age will be in about 50,000 years, @Maxwell, which will be about five to ten times longer than human history so far.

Dec 21, 2018
The next ice age will be in about 50,000 years, @Maxwell, which will be about five to ten times longer than human history so far.


honey we're in an Ice Age right now. It's just the inter-glacial period.

Dec 21, 2018
NOAA [AH] help save us from the flood ! Lets build the Arc !
If there is an arc, it will be a mega-yacht.

Dec 21, 2018
and cover Texas to a depth of nearly 13 feet.


Ok, Texas 269,000 sq miles, total ocean area 196 million sq miles...
So that added 0.2 inches of sea level over 25 years.
Big deal. :/

Dec 21, 2018
It's fun to think about a future where there is no shipping, no chemical plants, no nuclear power, no industry, and no housing for probably 1/2 of humanity.


Things are better than ever before in human history. Dope.

Dec 21, 2018
The infrastructural repair costs for old coastal cities will cost so much they won't be worth doing. Let them flood. Move people inland.

It's fun to think about a future where there is no shipping, no chemical plants, no nuclear power, no industry, and no housing for probably 1/2 of humanity.

If only there was something we could have done, before the disaster started... hmmm...


I guess we had get busy building ships, chemical plants, housing and nuclear plants. All that action would take care of 'no industry'.

Dec 22, 2018
The next ice age will be in about 50,000 years, @Maxwell, which will be about five to ten times longer than human history so far.


honey we're in an Ice Age right now. It's just the inter-glacial period.

With all the barking and chattering going inside that head, honey can expect to be confused and overwhelmed with total confusion

Dec 22, 2018
-thereby opening up wonderful new real estate investment opportunities, freeing prime lenders to print and issue $trillions, and providing a great excuse to abandon obsolete coastal infrastructure rather than continue to patch and cobble it to meet modern demands and accommodate state of the art technologies!
-Not to mention a whole new $$multi-billion underwater salvage industry! Govt contracts alone will be staggering!

Thanks again-

Dec 22, 2018
Oh no! Vote Communist!

Dec 22, 2018
The next ice age will be in about 50,000 years, @Maxwell, which will be about five to ten times longer than human history so far.

Da Snot, the "meat" loving, knob gobbler, brays again and pulls another nugget out of his rectum, where his boyfriend is still trying to hit his "sweet spot". LMAO

In the terminology of glaciology, ice age implies the presence of extensive ice sheets in both northern and southern hemispheres.[1] By this definition, we are in an interglacial period—the Holocene—of the current ice age.

The current ice age began 2.6 million years ago at the start of the Pleistocene epoch, and the Greenland, Arctic, and Antarctic ice sheets still exist.

https://en.wikipe.../Ice_age

Dec 22, 2018
It's incredible to see people in this thread saying "rebuilding the destroyed property will help the economy".

I mean, why wait? If that's the case then we should burn down our houses and businesses today! After all, "rebuilding will boost the economy"! By this metric, Afghanistan must have the best economy in the world!

How stupid do you have to be to be able to form these kinds of thoughts? It's actually stunning.

Dec 22, 2018
It's incredible to see people in this thread saying "rebuilding the destroyed property will help the economy".

It's known as the Broken Window Fallacy (https://rationalw..._fallacy ). It's well known as a stupid idea.

Dec 23, 2018
"Scientists speculate that a slight change in Earth's orbit and spin axis created warmer temperatures 125,000 years ago"
But a CO2 tax on the poor will prevent this?


Dec 23, 2018
The people not from earth that hide under that ice sheet will have to move. or publicly and not privately make themselves known to us.
Osiris1

....Err, sorry, what!?
There are people "not from earth" you know of that "hide under that ice sheet"?
How would you know this if they are hidden?
How can they survive without any apparent source of food? Do they have agriculture?
Which planet did they come from?
Did they choose to come all the way here from their home planet to then only live in such live a miserable existence hiding in in such a cold dark place? Or did that come about by accident?
Why are they hiding? Are they really THAT scared of us that they resort to living such a a miserable existence?


Dec 23, 2018
"Scientists speculate that a slight change in Earth's orbit and spin axis created warmer temperatures 125,000 years ago"
But a CO2 tax on the poor will prevent this?

unrealone1

Out of the MANY people I know of including scientists and a few environmentalists, absolutely NONE I am aware of is proposing and/or wants to put a "CO2 tax on the poor".

https://en.wikipe...traw_man

Dec 23, 2018
NONE I am aware of is proposing and/or wants to put a "CO2 tax on the poor"
Shhhhh - it's a secret.... Part of the secret communist plan to take over the world...

Dec 23, 2018
what concerns me is where did all the water that makes up all the ice sheets and glaciers come from in the first place ? I suspect most of it was in the sea, therefore what was the sea level before the ice sheets were created?

Dec 23, 2018
The Sky is Falling, the Sky is Falling.

Dec 23, 2018
what concerns me is where did all the water that makes up all the ice sheets and glaciers come from in the first place ? I suspect most of it was in the sea, therefore what was the sea level before the ice sheets were created?

A lot higher. Like, dozens of meters higher.

Dec 23, 2018
Cool by me. I was careful where I bought my property 20 years ago. It'll still be here in 2100.

Dec 24, 2018
The Sky is Falling, the Sky is Falling.
Gimp

https://en.wikipe...traw_man

Dec 24, 2018
Awful article: How on earth is the melt going to fill a billion pools or bury Texas?
I also hope that @Snoose was planning to build the ARC fusion reactor; not a 300m long wooden cigar shaped vessel.

We don't need more badly written articles. We need a multi-nationally created computer model resilient to challenges by both deniers and sky-chickens alike;
This model needs to be populated by realistic figures like hail-Mary-fusion being many years away, and our current coal burning trends.

Given that our grandchildren's lives, and future economies depend on it, we should be putting our absolutely best scientists on this and on to finding any solutions we find we need.

This cannot be left as a parochial political football much less important than building a wall against our world neighbours or stirring up more chaos in the middle east.

Dec 24, 2018
We also need world agreement to bar political appointee scientists from the panel that reports back their results.

And to avoid those who's solution is populating Mars!

Dec 24, 2018
we need to drop the whole GW issue , along with infantile political issues and just behave in an intelligent manner [ ya right , lol , grrrr ]

Dec 26, 2018
Cool by me. I was careful where I bought my property 20 years ago. It'll still be here in 2100.
says Da Scheide

But YOU won't be.

Dec 26, 2018
"Scientists speculate that a slight change in Earth's orbit and spin axis created warmer temperatures 125,000 years ago"
But a CO2 tax on the poor will prevent this?

unrealone1

Out of the MANY people I know of including scientists and a few environmentalists, absolutely NONE I am aware of is proposing and/or wants to put a "CO2 tax on the poor".

https://en.wikipe...traw_man
says humy

In the US, there are taxes that EVERYONE pays - whether employed or not. Even the working poor have to pay even a small amount of 'income tax' due to the fact that they are working.
The poor who don't work at all (and often have no intention of seeking work) are not, of course, charged for income tax until they find work.
But everyone gets taxed for commodities such as at the petrol stations, tobacco & alcohol products, and everything other than foods - which are nontaxable items.
CO2 taxes will be paid also by the working poor.
-cont-

Dec 26, 2018
-contd-
@humy
Whether or not the Antarctic ice sheets collapse - the Democrats in the US, under the auspices of climatologists/believers in AGW will insist on placing CO2 as a taxable item on the working poor and middle-class workers alike - as well as on large and small businesses.
At some point in the future, climatologists/believers in AGW will find it necessary to prevent airplanes that use fossil fuels from flying, and all vehicles that use petrol from running - with the help of the Democrats in the US gov't who will pass laws to ban Americans from using fossil fuels - except, of course - for those government officials and climatologists and some others who find that getting together for meetings and socialising wrt "climate change" and "Women's Marches" will be made exempt.
The UK, France, Germany and other nations will follow suit so as not to be regarded as willful polluters. China will pretend to do something about their own pollution in order to 'save face'.

Dec 27, 2018
what concerns me is where did all the water that makes up all the ice sheets and glaciers come from in the first place ? I suspect most of it was in the sea, therefore what was the sea level before the ice sheets were created?
What concerns me is that people like yourself dont realize that this is the sort of thing that scientists have studied exhaustively, and that the results can be found right here on the internet?

Or maybe you're just trolling? 'Stupid on Purpose' - would make a great t shirt-

Dec 27, 2018
incredible to see people in this thread saying "rebuilding the destroyed property will help the economy"...How stupid do you have to be to be able to form these kinds of thoughts?
How stupid do you have to be to not understand the fact that rebuilding takes place all the time? Or that entropy makes repair and upgrading far more expensive than building from scratch?

Retail space is built to last 12-20yrs. Low rise office and housing - 30/50yrs. Ever hear the phrase 'by the time a highway is built its obsolete'? Fully half the potable water that enters the NYC island leaks out before use.

Compare how much life has changed over the last 60yrs. MOST of the infrastructure was new-built to accommodate it. And yes, economies boomed because of it. And many cities like detroit and new Orleans were obsoleted as a result.

Coastal flooding and demographic rearrangements will happen on a similar schedule. Economies will benefit. Sorry if you're too timid and myopic to understand.

Dec 27, 2018
the Broken Window Fallacy
"a logical fallacy which assumes that destruction and the eventual recovery from it yields a net benefit to society."

-How quaint, philosophy. First off, this has nothing to do with formal logic. Entropy is a fact. Things are torn down and replaced all the time. New tech and shifting economies cause massive demographic moves, all the time.

Luddites might call the process of creating the interstate highway system, or the intercontinental railways, a form of 'destruction' but they would of course be wrong.

Geophysical events have caused disruption throughout history. The harappans disappeared when the indus dried up. New tech makes old strongholds undependable as with venice, and Switzerland was created as a result. Exploiting coal and iron caused cities to appear, harbors and canals to be dug, only to be abandoned decades later.

Our civilization has always been a dynamic one. This will never change whether AGW is real or not.

Dec 27, 2018
Errata - "New tech makes old strongholds undependable" should be UNDEFENDABLE.

Dec 27, 2018
The ignorant Chicken Littles are drowning in AGW Cult bullshit, yet they continue to burn fossil fuels as if there is no tomorrow.
Keep braying at the heretics, you jackasses. That's how, you'll will save the world.

PS: Still waiting for these jackasses to produce a single pal reviewed "study" that conclusively show any of the Cult's bullshit, doom and gloom, is caused by human CO2.

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