Rate of change in the Ordovician extinction

[Old Rocks]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

 

[JGalt]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

Damn those Ordovicians and their big gas-guzzling SUVs!

 

[elektra]

Old crock of shit made a claim about co2 then linked to an article that does not speak of co2 in any way shape or form.

This must be a discussion about old crock of shits filthy lying

Old crock, you stated if there is no link it is a lie.

There is no link to Old crock of shit's co2 claim

 

[odanny]

Old crock of shit made a claim about co2 then linked to an article that does not speak of co2 in any way shape or form.

This must be a discussion about old crock of shits filthy lying

Old crock, you stated if there is no link it is a lie.

There is no link to Old crock of shit's co2 claim

That is a wonderfully informative rebuttal.

Now, should I weigh that against the scientific data smartly presented in the opening post, it makes it difficult for me to decide on who I should believe between your two competing opinions.

I think I'm gonna go with the smart guy over the idiot.

 

[ding]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

So Darwin?

 

[ding]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

So first of all it would have been impossible for there to be a rapid reduction of CO2 that preceded the cooling. There's no mechanism for that other than an ocean that had cooled first. Secondly, what caused the rapid warming? Thermohaline circulation?

And lastly, our present warming rate is not unprecedented. Happens in every interglacial period.

 

[elektra]

That is a wonderfully informative rebuttal.

Now, should I weigh that against the scientific data smartly presented in the opening post, it makes it difficult for me to decide on who I should believe between your two competing opinions.

I think I'm gonna go with the smart guy over the idiot.

You just established you are the idiot. A claim is made about co2, there is no link supporting that claim.

 

[JGalt]

That is a wonderfully informative rebuttal.

Now, should I weigh that against the scientific data smartly presented in the opening post, it makes it difficult for me to decide on who I should believe between your two competing opinions.

I think I'm gonna go with the smart guy over the idiot.

So says some guy who thinks January 6, 2021 was as bad as the Japanese attack on Pearl Harbor.

Have you even read your own sig line?

 

[odanny]

So says some guy who thinks January 6, 2021 was as bad as the Japanese attack on Pearl Harbor.

Have you even read your own sig line?

The Japanese cost American lives but had no effect on our democracy. The January 6th attack damaged our democracy with an unprecedented attack from within, all orchestrated by a man who freed from prison all of those convicted in a court of law.

We have only just begun to see the abuse of power that you thirst for.

 

[Toddsterpatriot]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

That warming rate would be 0.0122 per 100 years.

Wow, that's a lot!

Post the 10 highest warming rates for each century during that period.

 

[Old Rocks]

Old crock of shit made a claim about co2 then linked to an article that does not speak of co2 in any way shape or form.

This must be a discussion about old crock of shits filthy lying

Old crock, you stated if there is no link it is a lie.

There is no link to Old crock of shit's co2 claim

Miss Elektra, perhaps it would be helpful if you took a third grade remedial reading class.

 

[Old Rocks]

That warming rate would be 0.0122 per 100 years.

Wow, that's a lot!

Post the 10 highest warming rates for each century during that period.

Why don't you read the article, retard. Then you might not post such stupid shit.

 

[Old Rocks]

So first of all it would have been impossible for there to be a rapid reduction of CO2 that preceded the cooling. There's no mechanism for that other than an ocean that had cooled first. Secondly, what caused the rapid warming? Thermohaline circulation?

And lastly, our present warming rate is not unprecedented. Happens in every interglacial period.

ABSTRACT

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated temperatures also increased metabolic demands such that hot shallow water environments had limited animal diversity as recorded by microbially dominated carbonates. As the oceans cooled through the Ordovician, animal biodiversity increased, leading to the Great Ordovician Biodiversification Event. The protracted nature of the cooling suggests that it was the product of progressive changes in tectonic boundary conditions. Low-latitude arc-continent collisions through this period may have increased global weatherability and decreased atmospheric CO2 levels. Additionally, decreasing continental arc magmatism could have lowered CO2 outgassing fluxes. The Ordovician long-term cooling trend culminated with the development of a large south polar ice sheet on Gondwana. The timescale of major ice growth and decay over the final 2 Myr of the Ordovician is consistent with Pleistocene-like glacial cycles driven by orbital forcing. The short duration of large-scale glaciation indicates a high sensitivity of ice volume to temperature with a strongly nonlinear response, providing a valuable analog for Neogene and future climate change.

• ▪ Oxygen isotope data record progressive and protracted cooling through the Ordovician leading up to the onset of Hirnantian glaciation.
• ▪ The gradual cooling trend is mirrored by an Ordovician radiation in biological diversity, consistent with temperature-dependent oxygen solubility and metabolism as a primary control.
• ▪ Long-term cooling occurred in concert with low-latitude arc-continent collisions and an increase in global weatherability. Although CO2 outgassing may have also decreased with an Ordovician decrease in continental arc length, in the modern, CO2 outgassing is variable along both continental and island arcs, leaving the relationship between continental arc length and climate uncertain.
• ▪ Evidence for significant ice growth is limited to less than 2 Myr of the Hirnantian Stage, suggesting a high sensitivity of ice growth to pCO2 and temperature.
• ▪ Independent estimates for ice volume, area, and sea level change during the Hirnantian glacial maximum are internally consistent and comparable to those of the Last Glacial Maximum.

The Causes and Consequences of Ordovician Cooling

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated...

www.annualreviews.org

A little research before flapping yap saves one embarrassment.

 

[elektra]

Miss Elektra, perhaps it would be helpful if you took a third grade remedial reading class.

I wont go down to a 3rd graders level so you might understand.

 

[ReinyDays]

A study of the Ordovician extinction, one of the great five mass extinctions has established the time period, and the role the rate of change played. First there was a rapid reduction of CO2 that cooled the atmosphere by 9 C over a period of about 340,000 years, then a rapid warming over a period of 60,000 years. The extinction rate for the cooling period was about 8.4% per 100,000 years, and the average cooling rate was 2.6 C per 100,000 years. The warming rate for the 60,000 years of warming was 12.2 C per 100,000 years. The extinction rate for 100,000 years for the warming period was 71.6% per 100,000 years. That warming rate would be 0.0122 per 100 years. Our present warming rate is 0.2 C per decade.

MSN

Do you know how to read a scientific instrument? ... I'm asking because you seem to think we can measure day-to-day temperature to the nearest 100th of a degree during a period four hundred million years ago ... and did you notice these temporal values are plus or minus 25,000 years? ...

The article doesn't explain how temperature effects uranium's alpha emissions ... go ahead ... we'll wait ...

 

[Sunsettommy]

ABSTRACT

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated temperatures also increased metabolic demands such that hot shallow water environments had limited animal diversity as recorded by microbially dominated carbonates. As the oceans cooled through the Ordovician, animal biodiversity increased, leading to the Great Ordovician Biodiversification Event. The protracted nature of the cooling suggests that it was the product of progressive changes in tectonic boundary conditions. Low-latitude arc-continent collisions through this period may have increased global weatherability and decreased atmospheric CO2 levels. Additionally, decreasing continental arc magmatism could have lowered CO2 outgassing fluxes. The Ordovician long-term cooling trend culminated with the development of a large south polar ice sheet on Gondwana. The timescale of major ice growth and decay over the final 2 Myr of the Ordovician is consistent with Pleistocene-like glacial cycles driven by orbital forcing. The short duration of large-scale glaciation indicates a high sensitivity of ice volume to temperature with a strongly nonlinear response, providing a valuable analog for Neogene and future climate change.

• ▪ Oxygen isotope data record progressive and protracted cooling through the Ordovician leading up to the onset of Hirnantian glaciation.
• ▪ The gradual cooling trend is mirrored by an Ordovician radiation in biological diversity, consistent with temperature-dependent oxygen solubility and metabolism as a primary control.
• ▪ Long-term cooling occurred in concert with low-latitude arc-continent collisions and an increase in global weatherability. Although CO2 outgassing may have also decreased with an Ordovician decrease in continental arc length, in the modern, CO2 outgassing is variable along both continental and island arcs, leaving the relationship between continental arc length and climate uncertain.
• ▪ Evidence for significant ice growth is limited to less than 2 Myr of the Hirnantian Stage, suggesting a high sensitivity of ice growth to pCO2 and temperature.
• ▪ Independent estimates for ice volume, area, and sea level change during the Hirnantian glacial maximum are internally consistent and comparable to those of the Last Glacial Maximum.

The Causes and Consequences of Ordovician Cooling

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated...

www.annualreviews.org

A little research before flapping yap saves one embarrassment.

BWAHAHAHAHAHA, oh the irony from a warmist fool who ignores much science research that doesn't support your hate of CO2.

 

[ding]

ABSTRACT

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated temperatures also increased metabolic demands such that hot shallow water environments had limited animal diversity as recorded by microbially dominated carbonates. As the oceans cooled through the Ordovician, animal biodiversity increased, leading to the Great Ordovician Biodiversification Event. The protracted nature of the cooling suggests that it was the product of progressive changes in tectonic boundary conditions. Low-latitude arc-continent collisions through this period may have increased global weatherability and decreased atmospheric CO2 levels. Additionally, decreasing continental arc magmatism could have lowered CO2 outgassing fluxes. The Ordovician long-term cooling trend culminated with the development of a large south polar ice sheet on Gondwana. The timescale of major ice growth and decay over the final 2 Myr of the Ordovician is consistent with Pleistocene-like glacial cycles driven by orbital forcing. The short duration of large-scale glaciation indicates a high sensitivity of ice volume to temperature with a strongly nonlinear response, providing a valuable analog for Neogene and future climate change.

• ▪ Oxygen isotope data record progressive and protracted cooling through the Ordovician leading up to the onset of Hirnantian glaciation.
• ▪ The gradual cooling trend is mirrored by an Ordovician radiation in biological diversity, consistent with temperature-dependent oxygen solubility and metabolism as a primary control.
• ▪ Long-term cooling occurred in concert with low-latitude arc-continent collisions and an increase in global weatherability. Although CO2 outgassing may have also decreased with an Ordovician decrease in continental arc length, in the modern, CO2 outgassing is variable along both continental and island arcs, leaving the relationship between continental arc length and climate uncertain.
• ▪ Evidence for significant ice growth is limited to less than 2 Myr of the Hirnantian Stage, suggesting a high sensitivity of ice growth to pCO2 and temperature.
• ▪ Independent estimates for ice volume, area, and sea level change during the Hirnantian glacial maximum are internally consistent and comparable to those of the Last Glacial Maximum.

The Causes and Consequences of Ordovician Cooling

A long-term cooling trend through the Ordovician Period, from 487 to 443 Ma, is recorded by oxygen isotope data. Tropical ocean basins in the Early Ordovician were hot, which led to low oxygen concentrations in the surface ocean due to the temperature dependence of oxygen solubility. Elevated...

www.annualreviews.org

A little research before flapping yap saves one embarrassment.

Lowering outgassing does not decrease atmospheric CO2. Try again. It is impossible for there to be a rapid reduction of CO2 that preceded the cooling. There's no mechanism for that other than an ocean that had cooled first. Secondly, what caused the rapid warming? Thermohaline circulation?

And lastly, our present warming rate is not unprecedented. Happens in every interglacial period.

 

[Toddsterpatriot]

Why don't you read the article, retard. Then you might not post such stupid shit.

The article didn't mention 100-year rates of change during the Ordovician extinction, you worthless ****.

I leave the posting of stupid shit to you, you're the expert.

 

[Old Rocks]

I wont go down to a 3rd graders level so you might understand.

First you have to ascend to third grade level. Won't.

 

[Old Rocks]

The article didn't mention 100-year rates of change during the Ordovician extinction, you worthless ****.

I leave the posting of stupid shit to you, you're the expert.

Another "Conservative" that cannot do simple math.