New research shows Antarctic ice sheets retreating as much as 600 metres per day

[Crick]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

 

[Orangecat]

 

[progressive hunter]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

if its even true so what??
they have been melting since the height of the ice age,,

 

[Death-Ninja]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

 

[excalibur]

Areas in Arctica that are melting are caused by volcanic activity beneath those areas.

Active volcano discovered beneath Antarctic ice sheet could be rapidly melting glacier

'Wild card' volcanic activity may add to climate change-induced sea level rise

www.independent.co.uk

 

[Oddball]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

 

[Death-Ninja]

We need to burn fascist democrats for fuel, both to heat, and to cool our homes, fascist democrats are the natural fuel for America's energy needs....

 

[Toddsterpatriot]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

Something happened faster, in the past, without human CO2?

Weird.

 

[Crick]

if its even true so what??
they have been melting since the height of the ice age,,

No, they have not. The issue is that due to isostasy, the bedrock under many of these Antarctic glaciers is BELOW sea level. As the grounding line has started falling back, there is the real risk of a catastrophic collapse; of a significant portion of the glacier rising off the rock bed and becoming buoyant. That would cause an immediate rise in sea level that would propagate around the world in a matter of days.

 

[Crick]

Something happened faster, in the past, without human CO2?

Yup

Weird.

Scary.

 

[Crick]

Areas in Arctica that are melting are caused by volcanic activity beneath those areas.

Active volcano discovered beneath Antarctic ice sheet could be rapidly melting glacier

'Wild card' volcanic activity may add to climate change-induced sea level rise

www.independent.co.uk

Fire and Ice: Why Volcanic Activity Is Not Melting the Polar Ice Sheets – Climate Change: Vital Signs of the Planet

Vital Signs of the Planet: Global Climate Change and Global Warming. Current news and data streams about global warming and climate change from NASA.

climate.nasa.gov

Studies do not support blog’s claim that volcanic activity is causing melting of West Antarctic glaciers

This claim is not supported by the three studies cited in the article. The article misinterprets the implications of one study and explicitly rejects the conclusions of the other two. All three studies, which investigated geothermal conditions beneath portions of the West Antarctic Ice Sheet and...

climatefeedback.org

 

[EMH]

This is like photos of "Osama" in Saudi, there are NONE.


SHOW US PHOTOS OF LANDMARKS SINKING BECAUSE OF THIS BULLSHIT "MELTING" YOU KEEP LYING ABOUT!!!!!


SHOW US THE PHOTOS!!!!

No more FUDGE!!

THE PHOTOS!!!


Venice = nope
Statue of Liberty = nope
Hawaii 5-0 beach = nope


Credibility of the "melting" "ocean rising" crowd = ZERO

 

[Crick]

This is like photos of "Osama" in Saudi, there are NONE.


SHOW US PHOTOS OF LANDMARKS SINKING BECAUSE OF THIS BULLSHIT "MELTING" YOU KEEP LYING ABOUT!!!!!


SHOW US THE PHOTOS!!!!

No more FUDGE!!

THE PHOTOS!!!


Venice = nope
Statue of Liberty = nope
Hawaii 5-0 beach = nope


Credibility of the "melting" "ocean rising" crowd = ZERO

God are you stupid.

welcome | Sea Level Research Group

sealevel.colorado.edu

Climate Change: Global Sea Level

Global average sea level has risen 8-9 inches since 1880, and the rate is accelerating thanks to glacier and ice sheet melt.

www.climate.gov

Sea Level | NASA Global Climate Change

Vital Signs of the Planet: Global Climate Change and Global Warming. Current news and data streams about global warming and climate change from NASA.

climate.nasa.gov

30 years of sea level rise in 2 charts

NASA concludes that sea level rise over this 30-year period is about 10 times more than it would be if only natural flows of water between ocean and land were measured in a year.

www.weforum.org

Global and European sea-level rise

The rate of global mean sea level rise has accelerated during the last two centuries. Tide gauges show that global mean sea level rose at a rate of around 1.7 mm/year over the 20 th century, but there have been significant decadal variations around this value. Satellite measurements show a...

www.eea.europa.eu

 

[CrusaderFrank]

No, they have not. The issue is that due to isostasy, the bedrock under many of these Antarctic glaciers is BELOW sea level. As the grounding line has started falling back, there is the real risk of a catastrophic collapse; of a significant portion of the glacier rising off the rock bed and becoming buoyant. That would cause an immediate rise in sea level that would propagate around the world in a matter of days.

And American CO2 is to blame, right?

 

[CrusaderFrank]

This is like photos of "Osama" in Saudi, there are NONE.


SHOW US PHOTOS OF LANDMARKS SINKING BECAUSE OF THIS BULLSHIT "MELTING" YOU KEEP LYING ABOUT!!!!!


SHOW US THE PHOTOS!!!!

No more FUDGE!!

THE PHOTOS!!!


Venice = nope
Statue of Liberty = nope
Hawaii 5-0 beach = nope


Credibility of the "melting" "ocean rising" crowd = ZERO

Plymouth "denier" Rock...still above water since 1620

 

[EMH]

God are you stupid.

welcome | Sea Level Research Group

sealevel.colorado.edu

Climate Change: Global Sea Level

Global average sea level has risen 8-9 inches since 1880, and the rate is accelerating thanks to glacier and ice sheet melt.

www.climate.gov

Sea Level | NASA Global Climate Change

Vital Signs of the Planet: Global Climate Change and Global Warming. Current news and data streams about global warming and climate change from NASA.

climate.nasa.gov

30 years of sea level rise in 2 charts

NASA concludes that sea level rise over this 30-year period is about 10 times more than it would be if only natural flows of water between ocean and land were measured in a year.

www.weforum.org

Global and European sea-level rise

The rate of global mean sea level rise has accelerated during the last two centuries. Tide gauges show that global mean sea level rose at a rate of around 1.7 mm/year over the 20 th century, but there have been significant decadal variations around this value. Satellite measurements show a...

www.eea.europa.eu

The request was for PHOTOS not MORE FUDGE.

PHOTOS documenting LANDMARKS that are "sinking..."

Jeopardy! music still playing....

 

[Crick]

And American CO2 is to blame, right?

Anthropogenic CO2 is primarily to blame.

 

[Crick]

The request was for PHOTOS not MORE FUDGE.

PHOTOS documenting LANDMARKS that are "sinking..."

Jeopardy! music still playing....

Fuck you. How many photos is it going to take to show you the data that was in those graphs. Look, if you think all science is a big con job, this isn't where you belong. That is NOT the topic of this forum. Why don't you find somewhere else to go and waste everyone's time?

 

[EMH]

Fuck you. How many photos is it going to take to show you the data that was in those graphs. Look, if you think all science is a big con job, this isn't where you belong. That is NOT the topic of this forum. Why don't you find somewhere else to go and waste everyone's time.

This is the same shit we get with "Osama" in Saudi.



There are NO PHOTOS of "Osama" in Saudi because Col Tim Osman was NEVER THERE.

There are NO PHOTOS of LANDMARKS on PLANET EARTH "sinking" because there is NO OCEAN RISE because there is NO ONGOING NET ICE MELT and everyone claiming there is one ongoing is a treasonous LIAR bilking the taxpayer via FUDGE and FRAUD.

 

[skye]

Recent observations below the ice sheet at the boundaries of Antarctic glaciers have been able to measure the rate of retreat of the glacier's grounding line. That rate far exceeds any prior estimates of a maximum rate for such movement. This further increases the odds of a catastrophic collapse of Antarctic ice sheets whose weight has forced their bedrock below sea level.

Rapid, buoyancy-driven ice-sheet retreat of hundreds of metres per day - Nature

Analysis of more than 7,600 corrugation ridges on the Norwegian continental shelf shows that rapid grounding-line retreat of several hundred metres per day occurred across low-gradient ice-sheet beds during the last deglaciation.

www.nature.com

Abstract​

Rates of ice-sheet grounding-line retreat can be quantified from the spacing of corrugation ridges on deglaciated regions of the seafloor1,2, providing a long-term context for the approximately 50-year satellite record of ice-sheet change3,4,5. However, the few existing examples of these landforms are restricted to small areas of the seafloor, limiting our understanding of future rates of grounding-line retreat and, hence, sea-level rise. Here we use bathymetric data to map more than 7,600 corrugation ridges across 30,000 km2 of the mid-Norwegian shelf. The spacing of the ridges shows that pulses of rapid grounding-line retreat, at rates ranging from 55 to 610 m day−1, occurred across low-gradient (±1°) ice-sheet beds during the last deglaciation. These values far exceed all previously reported rates of grounding-line retreat across the satellite3,4,6,7 and marine-geological1,2 records. The highest retreat rates were measured across the flattest areas of the former bed, suggesting that near-instantaneous ice-sheet ungrounding and retreat can occur where the grounding line approaches full buoyancy. Hydrostatic principles show that pulses of similarly rapid grounding-line retreat could occur across low-gradient Antarctic ice-sheet beds even under present-day climatic forcing. Ultimately, our results highlight the often-overlooked vulnerability of flat-bedded areas of ice sheets to pulses of extremely rapid, buoyancy-driven retreat.

^^^