Claim: Evidence of Antarctic glacier’s tipping point confirmed for first time

[Sunsettommy]

Another stupid modeling construct based paper to put up with, they used the word irreversible several times, while completely ignoring the main cause of the melting.

Watts Up With That?

Claim: Evidence of Antarctic glacier’s tipping point confirmed for first time
13 hours ago

Charles Rotter

Excerpt:

Researchers have confirmed for the first time that Pine Island Glacier in West Antarctica could cross tipping points, leading to a rapid and irreversible retreat which would have significant consequences for global sea level

Researchers have confirmed for the first time that Pine Island Glacier in West Antarctica could cross tipping points, leading to a rapid and irreversible retreat which would have significant consequences for global sea level.

Pine Island Glacier is a region of fast-flowing ice draining an area of West Antarctica approximately two thirds the size of the UK. The glacier is a particular cause for concern as it is losing more ice than any other glacier in Antarctica.

Currently, Pine Island Glacier together with its neighbouring Thwaites glacier are responsible for about 10% of the ongoing increase in global sea level.

LINK

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Stupid!

 

[Weatherman2020]

Another stupid modeling construct based paper to put up with, they used the word irreversible several times, while completely ignoring the main cause of the melting.

Watts Up With That?

Claim: Evidence of Antarctic glacier’s tipping point confirmed for first time
13 hours ago

Charles Rotter

Excerpt:

Researchers have confirmed for the first time that Pine Island Glacier in West Antarctica could cross tipping points, leading to a rapid and irreversible retreat which would have significant consequences for global sea level

Researchers have confirmed for the first time that Pine Island Glacier in West Antarctica could cross tipping points, leading to a rapid and irreversible retreat which would have significant consequences for global sea level.

Pine Island Glacier is a region of fast-flowing ice draining an area of West Antarctica approximately two thirds the size of the UK. The glacier is a particular cause for concern as it is losing more ice than any other glacier in Antarctica.

Currently, Pine Island Glacier together with its neighbouring Thwaites glacier are responsible for about 10% of the ongoing increase in global sea level.

LINK

======

Stupid!

These Panic Porn creators are funnier than the Bee.

 

[Weatherman2020]

I blame Fred Flinstone.

Melting ice sheets triggered nearly 60 feet of sea level rise 14,600 years ago - UPI.com

Using geological records, scientists were able to detail the scale of a dramatic sea-level rise event at the end of the last ice age, as well as pinpoint the ice sheets responsible for such rapid melt rates.

www.upi.com

 

[Foreigner Looking In.]

"the glacier is responsible for around 10% of the ongoing rise in sea level...."
Annual sea level rise is 1 mm per year, so that would be 0.1mm.
Run for the hills.

 

[Shelzin]

"The next big question is to work out what triggered the ice melt, and what impact the massive influx of meltwater had on ocean currents in the North Atlantic," Whitehouse said.

MMMmmm... We don't know what triggered it back then, but it's DIFFENITLY not why ice melting is happening today.

 

[Foreigner Looking In.]

The sea is being reclaimed by land faster than vice versa.

 

[ding]

In the last interglacial cycle the sea level was ~26 ft higher than present.

 

[DGS49]

The Leftist conspiracy to control the world's economy based on the threat of catastrophic climate change is shameless and transparent, as well as being easily debunked.

Of all the "catastrophic" effects, a rise in the sea level is the least problematic, easily solvable with the lowest-tech solutions.

Bring on the next one.

 

[ReinyDays]

Most of the expected sea level rise will be do to thermal expansion of the water ... melting icecaps and glaciers aren't thought to contribute much ... there's counties in the United States bigger than Great Britain ... [yawn] ...

The term "tipping point" is always a red flag for FAKE NEWS ... there's nothing about a glacier retreating that causes the glacier to retreat more ... the size of the glacier depends on the equilibrium temperature, if this temperature has increased locally and recently, then the glacier will adjust towards its new equilibrium size ... and no more ... it's the LAW ...

 

[jbrownson0831]

I blame Fred Flinstone.

Melting ice sheets triggered nearly 60 feet of sea level rise 14,600 years ago - UPI.com

Using geological records, scientists were able to detail the scale of a dramatic sea-level rise event at the end of the last ice age, as well as pinpoint the ice sheets responsible for such rapid melt rates.

www.upi.com

So THAT'S why the latest sheeple facediapers now have snorkels on them

 

[Crick]

Most of the expected sea level rise will be do to thermal expansion of the water ... melting icecaps and glaciers aren't thought to contribute much ... there's counties in the United States bigger than Great Britain ... [yawn] ...

The term "tipping point" is always a red flag for FAKE NEWS ... there's nothing about a glacier retreating that causes the glacier to retreat more ... the size of the glacier depends on the equilibrium temperature, if this temperature has increased locally and recently, then the glacier will adjust towards its new equilibrium size ... and no more ... it's the LAW ...

The dynamics of glaciers flowing into the ocean is considerably more complex than you suggest. Picture an experiment in which a single grain of sand is dropped onto a plate. Then another and then another. As time goes by, a pile develops; a little cone of sand. At some point the increasing slope will become unstable and when the next grain falls, a small landslide will occur taking a significant amount of sand down the slope. The landslide will stop and the fall of grains will continue, building the pile up again until it again becomes just a little too steep and the next grain triggers a collapse. The world of nature is not all smooth curves and predictable behavior and you only make yourself look foolish to suggest it.

Since we seem to be missing Post #1 in this thread, I assume this discussion concerns the Thwaites Glacier dumping itself into Pine Bay. The current fear concerning Thwaites is that it is rapidly - and very likely irreversibly - approaching a point in which its bounding ice sheet will slip past two major pinning points on the ocean bottom below it. This will cause a catastrophic collapse of the ice sheet and the further acceleration of the glacier's flow into the ocean. The collapse of Thwaites could also lead to the catastrophic collapse of the Pine Island Glacier. The combination of the two would raise sea level worldwide by 10 feet. The problem these two glaciers have is that, as part of the West Antarctic Ice Sheet, their bedrock is actually below sea level. The intrusion of water from the loss of the bounding ice sheets could cause catastrophic (read, IMMEDIATE) collapse of the glaciers themselves into the ocean. We're not talking about a sea level rise over centuries but over days.

 

[ReinyDays]

The dynamics of glaciers flowing into the ocean is considerably more complex than you suggest. Picture an experiment in which a single grain of sand is dropped onto a plate. Then another and then another. As time goes by, a pile develops; a little cone of sand. At some point the increasing slope will become unstable and when the next grain falls, a small landslide will occur taking a significant amount of sand down the slope. The landslide will stop and the fall of grains will continue, building the pile up again until it again becomes just a little too steep and the next grain triggers a collapse. The world of nature is not all smooth curves and predictable behavior and you only make yourself look foolish to suggest it.

That's a particularly poor analogy ... all you're describing is the difference between static and dynamic friction ... perfectly round and smooth grains of sand will always form a layer one grain thick ... what we call "a surface of equal gravitational potential" ... glaciers are already in motion, so only the sand pile in motion correctly illustartes the physical processes occurring where the much weaker dynamic friction is in play ...

Since we seem to be missing Post #1 in this thread, I assume this discussion concerns the Thwaites Glacier dumping itself into Pine Bay. The current fear concerning Thwaites is that it is rapidly - and very likely irreversibly - approaching a point in which its bounding ice sheet will slip past two major pinning points on the ocean bottom below it. This will cause a catastrophic collapse of the ice sheet and the further acceleration of the glacier's flow into the ocean. The collapse of Thwaites could also lead to the catastrophic collapse of the Pine Island Glacier. The combination of the two would raise sea level worldwide by 10 feet. The problem these two glaciers have is that, as part of the West Antarctic Ice Sheet, their bedrock is actually below sea level. The intrusion of water from the loss of the bounding ice sheets could cause catastrophic (read, IMMEDIATE) collapse of the glaciers themselves into the ocean. We're not talking about a sea level rise over centuries but over days.

I think you're confusing this with the sudden ice sheet collapse ... and it's tsunamis that will cause the catastrophe ...

Mathing your "10 feet mean sea level rise" gives us a block of ice the size of Great Britian, 1 kilometer thick, mechanically suspended over the ocean surface ... I'm no engineer but the tensile strength of ice isn't anywhere close to that strong ... I don't even think we can cantilever a petatonne of steel out this 1,000 km ...

Keep in mind, at the crazy extreme value of climate forcing of 8.5 W/m^2 ... it will take 1,000 years to melt all that ice ... with global temperatures remaining constant ... math is hard, especially for liberals ...