A 45 million year record of Arctic sea temperatures and ice melt

[ding]

A new study uses AI and machine learning to examine data from archaean lipid membranes providing surface temperature, CO2 levels and oxygen isotope content correlation over the past 45 million years.

ABSTRACT
Cenozoic evolution of the Antarctic ice sheets is thought to be driven primarily by long-term changes in radiative forcing, but the tectonic evolution of Antarctica may also have played a substantive role. While deep-sea foraminiferal oxygen isotope records provide a combined measure of global continental ice volume and ocean temperature, they do not provide direct insights into non-radiative influences on Antarctic Ice Sheet dynamics. Here we present an Antarctic compilation of Cenozoic upper-ocean temperature for the Ross Sea and offshore Wilkes Land, generated by membrane lipid distributions from archaea. We find trends of ocean temperature, atmospheric carbon dioxide and oxygen isotopes largely co-vary. However, this relationship is less clear for the late Oligocene, when high-latitude cooling occurred despite interpretation of oxygen isotopes suggesting global warming and ice-volume loss. We propose this retreat of the West Antarctic Ice Sheet occurred in response to a tectonically driven marine transgression, with warm surface waters precluding marine-based ice-sheet growth. Marine ice-sheet expansion occurred only when ocean temperatures further cooled during the Oligocene–Miocene transition, with cold orbital conditions and low atmospheric carbon dioxide. Our results support a threshold response to atmospheric carbon dioxide, below which Antarctica’s marine ice sheets grow, and above which ocean warming exacerbates their retreat. "

Climatic and tectonic drivers of late Oligocene Antarctic ice volume - Nature Geoscience (Sorry, but this is a Nature Geoscience paywall)

This study supports the earlier study finding a high likelihood that CO2 levels above 400 ppm are likely to completely eliminate the Antarctic ice shelves which will lead to massively increased glacial ice sheet loss and large rises in sea levels.

Reread the title of your OP. Doesn’t seem to mesh with the OP.

 

[expat_panama]

Well I'm sorry but scientific consensus among the scientific community says you're an idiot. And a political message board is exactly where liars spread their misinformation. If a real climate scientist were here they'd be able to tell you quickly why your information is wrong. If not, you should go work for NASA.

But you believe the scientists are lying because their jobs depend on it. Or because GREEN corporate lobbyists are paying them to lie. Never will you ever admit the Republicans are paid by the oil and coal lobbyists to lie.

you're not sorry but ur on my ignore list

 

[ding]

Well I'm sorry but scientific consensus among the scientific community says you're an idiot.

I seriously doubt that.

 

[Flash]

South Pole Hits Record Cold November Temperatures – The Daily Sceptic

Three recent days – November 16th, 17th and 18th – have recorded a daily record of extreme cold at the South Pole. Inexplicably, these records have escaped reporting in the mainstream media.

dailysceptic.org

South Pole Hits Record Cold November Temperatures​

Extreme cold records continue to tumble at the South Pole. Three recent days – November 16th, 17th and 18th – have recorded a daily record, with the 18th plunging to –45.2°C, compared with –44.7°C on the same day in 1987. The records follow the six-month winter of 2020-21, which was the coldest since records began in 1957. Inexplicably, all these facts and trends have escaped reporting in the mainstream media. The excuse might be that it is just weather, and temperatures have always moved up and down. But the excuse doesn’t seem to apply to the July 19th U.K. high of 40.3°C at RAF Coningsby, recorded at the side of the runway used by after-burning Typhoon jets. This record high has barely been out of the Net Zero headlines ever since.

In fact, anything getting colder barely gets a look-in these days. Arctic sea ice is making a significant, near silent comeback. Summer ice at the end of September covered 4.92 million square kilometres, which was 1.35 million sq kms higher than the 2012 low. Over on land, the Greenland ice sheet may have increased in size over the last year to August 2022. Meanwhile, the zoologist Dr. Susan Crockford has reported that this is the fifth year out of the last seven that enough sea ice has formed along the west coast of Hudson Bay by mid-November for hunting polar bears to be able to head out to the ice, “just as it did in the 1980s”.

 

[CrusaderFrank]

South Pole Hits Record Cold November Temperatures – The Daily Sceptic

Three recent days – November 16th, 17th and 18th – have recorded a daily record of extreme cold at the South Pole. Inexplicably, these records have escaped reporting in the mainstream media.

dailysceptic.org

South Pole Hits Record Cold November Temperatures​

Extreme cold records continue to tumble at the South Pole. Three recent days – November 16th, 17th and 18th – have recorded a daily record, with the 18th plunging to –45.2°C, compared with –44.7°C on the same day in 1987. The records follow the six-month winter of 2020-21, which was the coldest since records began in 1957. Inexplicably, all these facts and trends have escaped reporting in the mainstream media. The excuse might be that it is just weather, and temperatures have always moved up and down. But the excuse doesn’t seem to apply to the July 19th U.K. high of 40.3°C at RAF Coningsby, recorded at the side of the runway used by after-burning Typhoon jets. This record high has barely been out of the Net Zero headlines ever since.

In fact, anything getting colder barely gets a look-in these days. Arctic sea ice is making a significant, near silent comeback. Summer ice at the end of September covered 4.92 million square kilometres, which was 1.35 million sq kms higher than the 2012 low. Over on land, the Greenland ice sheet may have increased in size over the last year to August 2022. Meanwhile, the zoologist Dr. Susan Crockford has reported that this is the fifth year out of the last seven that enough sea ice has formed along the west coast of Hudson Bay by mid-November for hunting polar bears to be able to head out to the ice, “just as it did in the 1980s”.

South Pole Hits Record Cold November Temperatures....er, because of manmade global climate warming change!

We have Consensus!

 

[sealybobo]

I seriously doubt that.

You're on my ignore list. LOL

 

[sealybobo]

South Pole Hits Record Cold November Temperatures....er, because of manmade global climate warming change!

We have Consensus!

Anyone who says, "it's colder than normal in November" and thinks that means global warming isn't real because it's cold, is an idiot.

That colder than usual weather is because of global warming.

 

[ding]

You're on my ignore list. LOL

It’s about time.

 

[ding]

Anyone who says, "it's colder than normal in November" and thinks that means global warming isn't real because it's cold, is an idiot.

That colder than usual weather is because of global warming.

How about people who say if temperature correlated with CO2 our planet wouldn’t be 2C cooler than the previous interglacial cycle when it has 120 ppm more atmospheric CO2 than the previous interglacial cycle?

 

[sealybobo]

How about people who say if temperature correlated with CO2 our planet wouldn’t be 2C cooler than the previous interglacial cycle when it has 120 ppm more atmospheric CO2 than the previous interglacial cycle?

You're blowing my mind science guy.

 

[sealybobo]

How about people who say if temperature correlated with CO2 our planet wouldn’t be 2C cooler than the previous interglacial cycle when it has 120 ppm more atmospheric CO2 than the previous interglacial cycle?

I like all the new options. Looks like Elon Musk purchased USMB and he's making it better because now I can hit the fake news button. lOL.

 

[ding]

You're blowing my mind science guy.

Winter reminds us every year just how far the glaciers will extend.

 

[jc456]

Yes, I guess. I don't know. Is it? You seem to be the intelligent guy who goes against scientific consensus.



Global warming is also giving us cancer. Going Green would mean millions would live longer and healthier lives and it would save US money. But you cons don't see that right?

Consensus, hahahaha hahahaha

 

[Crick]

A new study uses AI and machine learning to examine data from archaean lipid membranes providing surface temperature, CO2 levels and oxygen isotope content correlation over the past 45 million years.

ABSTRACT
Cenozoic evolution of the Antarctic ice sheets is thought to be driven primarily by long-term changes in radiative forcing, but the tectonic evolution of Antarctica may also have played a substantive role. While deep-sea foraminiferal oxygen isotope records provide a combined measure of global continental ice volume and ocean temperature, they do not provide direct insights into non-radiative influences on Antarctic Ice Sheet dynamics. Here we present an Antarctic compilation of Cenozoic upper-ocean temperature for the Ross Sea and offshore Wilkes Land, generated by membrane lipid distributions from archaea. We find trends of ocean temperature, atmospheric carbon dioxide and oxygen isotopes largely co-vary. However, this relationship is less clear for the late Oligocene, when high-latitude cooling occurred despite interpretation of oxygen isotopes suggesting global warming and ice-volume loss. We propose this retreat of the West Antarctic Ice Sheet occurred in response to a tectonically driven marine transgression, with warm surface waters precluding marine-based ice-sheet growth. Marine ice-sheet expansion occurred only when ocean temperatures further cooled during the Oligocene–Miocene transition, with cold orbital conditions and low atmospheric carbon dioxide. Our results support a threshold response to atmospheric carbon dioxide, below which Antarctica’s marine ice sheets grow, and above which ocean warming exacerbates their retreat. "

Climatic and tectonic drivers of late Oligocene Antarctic ice volume - Nature Geoscience (Sorry, but this is a Nature Geoscience paywall)

This study supports the earlier study finding a high likelihood that CO2 levels above 400 ppm are likely to completely eliminate the Antarctic ice shelves which will lead to massively increased glacial ice sheet loss and large rises in sea levels.

It also supports the exceedingly strong correlation between CO2 and temperature.

 

[ding]

It also supports the exceedingly strong correlation between CO2 and temperature.

Post Industrial Revolution there is no correlation between CO2 and temperature. If there were the planet wouldn’t presently be 2C cooler with 26ft shallower seas than the previous interglacial cycle because presently there is 120 ppm more atmospheric CO2 than the previous interglacial cycle.

 

[ding]

A new study uses AI and machine learning to examine data from archaean lipid membranes providing surface temperature, CO2 levels and oxygen isotope content correlation over the past 45 million years.

ABSTRACT
Cenozoic evolution of the Antarctic ice sheets is thought to be driven primarily by long-term changes in radiative forcing, but the tectonic evolution of Antarctica may also have played a substantive role. While deep-sea foraminiferal oxygen isotope records provide a combined measure of global continental ice volume and ocean temperature, they do not provide direct insights into non-radiative influences on Antarctic Ice Sheet dynamics. Here we present an Antarctic compilation of Cenozoic upper-ocean temperature for the Ross Sea and offshore Wilkes Land, generated by membrane lipid distributions from archaea. We find trends of ocean temperature, atmospheric carbon dioxide and oxygen isotopes largely co-vary. However, this relationship is less clear for the late Oligocene, when high-latitude cooling occurred despite interpretation of oxygen isotopes suggesting global warming and ice-volume loss. We propose this retreat of the West Antarctic Ice Sheet occurred in response to a tectonically driven marine transgression, with warm surface waters precluding marine-based ice-sheet growth. Marine ice-sheet expansion occurred only when ocean temperatures further cooled during the Oligocene–Miocene transition, with cold orbital conditions and low atmospheric carbon dioxide. Our results support a threshold response to atmospheric carbon dioxide, below which Antarctica’s marine ice sheets grow, and above which ocean warming exacerbates their retreat. "

Climatic and tectonic drivers of late Oligocene Antarctic ice volume - Nature Geoscience (Sorry, but this is a Nature Geoscience paywall)

This study supports the earlier study finding a high likelihood that CO2 levels above 400 ppm are likely to completely eliminate the Antarctic ice shelves which will lead to massively increased glacial ice sheet loss and large rises in sea levels.

Do you even know what the temperature thresholds are for extensive continental glaciation at each pole?

 

[sealybobo]

Consensus, hahahaha hahahaha

According to the Centers for Disease Control and Prevention statistics, cold is a greater risk to life than excessive heat. The U.S. Forest Service says excessive cold causes roughly 85%of outdoor recreation fatalities, according to the U.S. Forest Service.

 

[jc456]

According to the Centers for Disease Control and Prevention statistics, cold is a greater risk to life than excessive heat. The U.S. Forest Service says excessive cold causes roughly 85%of outdoor recreation fatalities, according to the U.S. Forest Service.

So why do you demofks want us in cold?

 

[sealybobo]

So why do you demofks want us in cold?

We don't want to fuck with the atmosphere. It's very fragile. Every astronaut who's gone up comes back with a greater appreciation of that. They all say it. We should stop fucking up our atmosphere. Very thin layer between us and outer space. And have you seen how life does in outer space? Fucking idiot!

 

[jc456]

We don't want to fuck with the atmosphere. It's very fragile. Every astronaut who's gone up comes back with a greater appreciation of that. They all say it. We should stop fucking up our atmosphere. Very thin layer between us and outer space. And have you seen how life does in outer space? Fucking idiot!

Who’s fking with the atmosphere?