CO2 level highest in 23 million years

[Old Rocks]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

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RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

 

[EvilCat Breath]

That would mean a luxurious plant life

 

[Rambunctious]

And we are still here....

 

[marvin martian]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

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RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
Article history

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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

Amazing! Then CO2 really doesn't have any correlation to temperatures, because there are many periods in the last 23 million years that were far hotter than now, yet, according to this study, those periods had lower CO2 concentrations.

You've just sunk the warmists' entire premise. Well done!

 

[Rambunctious]

Trees are loving it....

 

[Old Rocks]

That would mean a luxurious plant life

And we are seeing over a million acres of that luxurious plant life glowing at night in California. And dozens more fires in the Western States. Lots of luxurious plant life lying around on the East Coast right now. Wonderful, isn't it.

 

[CrusaderFrank]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

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RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
Article history

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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

“A reliable way to make people believe in falsehoods is frequent repetition, because familiarity is not easily distinguished from truth. Authoritarian institutions and marketers (and the AGW Cult) have always known this fact.” ― Daniel Kahneman, Thinking, Fast and Slow​

 

[CrusaderFrank]

And we are seeing over a million acres of that luxurious plant life glowing at night in California. And dozens more fires in the Western States. Lots of luxurious plant life lying around on the East Coast right now. Wonderful, isn't it.

I thought CO2 caused hurricanes?

Can you make up your mind?

 

[CrusaderFrank]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

Skip Nav Destination
RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
Article history

• Standard View
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• Cite
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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

 

[Old Rocks]

And we are still here....

50,000+ people that are not at home in California,. hundreds on the East Coast with uninhabitable homes. But a very stupid reply will do better than nothing, I suppose.

 

[Rambunctious]

50,000+ people that are not at home in California,. hundreds on the East Coast with uninhabitable homes. But a very stupid reply will do better than nothing, I suppose.

Even the CA forestry captain said these fires are not a direct result of global warming....if you watched something other than propaganda news you would have heard him say it....

I grew up in CA...we have always had devastating fires...because we don't do prevention...

 

[Old Rocks]

Amazing! Then CO2 really doesn't have any correlation to temperatures, because there are many periods in the last 23 million years that were far hotter than now, yet, according to this study, those periods had lower CO2 concentrations.

You've just sunk the warmists' entire premise. Well done!

There is a lot of inertia in the system, whole oceans of it, in fact. That you do not understand this is what one would expect from you. That you choose to ignore what it portends for the future is also what one would expect from a person of your intellectual capability.

 

[Rambunctious]

I'll bet the OP laughed at Reagan when he said trees love C02...a result of being a tool for lefties news....

 

[Old Rocks]

Trees are loving it....

By god, they surely are

 

[marvin martian]

There is a lot of inertia in the system, whole oceans of it, in fact. That you do not understand this is what one would expect from you. That you choose to ignore what it portends for the future is also what one would expect from a person of your intellectual capability.

You blustered a lot here, but did nothing to convince anyone that CO2 has anything to do with higher temperatures. In fact, you disproved it.

 

[jbrownson0831]

There is a lot of inertia in the system, whole oceans of it, in fact. That you do not understand this is what one would expect from you. That you choose to ignore what it portends for the future is also what one would expect from a person of your intellectual capability.

Wow....a person of my intellectual capability deemed it unwise to live in leftcoast libberland.

 

[Rambunctious]

By god, they surely are

View attachment 534148

I've told this story many times here...I lived in the SF valley growing up...we had fires every summer in the hills...but they didn't spread because they carved fire breaks in the hillsides...

People like you said they were ugly so they stopped...three years later we had the Malibu fire...the fire went from Porter ranch all the way to Malibu with no way to stop it....

If we are truly experiencing global warming then we had better learn to live with it because we sure can't change it....we don't have the power...

 

[Oddball]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

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RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
Article history

• Standard View
• PDF LinkPDF
• Cite
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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

 

[Adrenochrome Junkie]

According to this study, it appears that the present CO2 level is the highest it has been since the Miocene.

Skip Nav Destination
RESEARCH ARTICLE| MAY 29, 2020

A 23 m.y. record of low atmospheric CO2​

Ying Cui;

Brian A. Schubert;

A. Hope Jahren

Geology (2020) 48 (9): 888–892.
A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld
Article history

• Standard View
• PDF LinkPDF
• Cite
• Share Icon Share
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Abstract​

Current atmospheric CO2 concentration is known to be higher than it has been during the past ∼800 k.y. of Earth history, based on direct measurement of CO2 within ice cores. A comparison to the more ancient past is complicated by a deficit of CO2 proxies that may be applied across very long spans of geologic time. Here, we present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400 m.y. history of C3 photosynthesis on land. Across the past 23 m.y., CO2 likely ranged between ∼230 ppmv and 350 ppmv (68% confidence interval: ∼170–540 ppm). CO2 was found to be highest during the early and middle Miocene and likely below present-day levels during the middle Pliocene (84th percentile: ∼400 ppmv). These data suggest present-day CO2 (412 ppmv) exceeds the highest levels that Earth experienced at least since the Miocene, further highlighting the present-day disruption of long-established CO2 trends within Earth’s atmosphere.

A 23 m.y. record of low atmospheric CO2 | Geology | GeoScienceWorld

pubs.geoscienceworld.org

Perhaps to help lower CO2 emissions we should depopulate people on the planet through the use of vaccines

 

[TroglocratsRdumb]

The Climate Change Cultists have been wrong on all of their predictions