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Ancient Climate Change Triggered Warming That Lasted Thousands of Years (phys.org)
An anonymous reader quotes a report from Phys.Org: A rapid rise in temperature on ancient Earth triggered a climate response that may have prolonged the warming for many thousands of years, according to scientists. Their study, published online in Nature Geoscience, provides new evidence of a climate feedback that could explain the long duration of the Paleocene-Eocene Thermal Maximum (PETM), which is considered the best analogue for modern climate change. The findings also suggest that climate change today could have long-lasting impacts on global temperature even if humans are able to curb greenhouse gas emissions.
Increased erosion during the PETM, approximately 56 million years ago, freed large amounts of fossil carbon stored in rocks and released enough carbon dioxide, a greenhouse gas, into the atmosphere to impact temperatures long term, researchers said. Scientists found evidence for the massive carbon release in coastal sediment fossil cores. They analyzed the samples using an innovative molecular technique that enabled them to trace how processes like erosion moved carbon in deep time. Global temperatures increased by about 9 to 14.4 degrees Fahrenheit during the PETM, radically changing conditions on Earth. Severe storms and flooding became more common, and the warm, wet weather led to increased erosion of rocks. As erosion wore down mountains over thousands of years, carbon was released from rocks and transported by rivers to oceans, where some was reburied in coastal sediments. Along the way, some of the carbon entered the atmosphere as greenhouse gas.
Increased erosion during the PETM, approximately 56 million years ago, freed large amounts of fossil carbon stored in rocks and released enough carbon dioxide, a greenhouse gas, into the atmosphere to impact temperatures long term, researchers said. Scientists found evidence for the massive carbon release in coastal sediment fossil cores. They analyzed the samples using an innovative molecular technique that enabled them to trace how processes like erosion moved carbon in deep time. Global temperatures increased by about 9 to 14.4 degrees Fahrenheit during the PETM, radically changing conditions on Earth. Severe storms and flooding became more common, and the warm, wet weather led to increased erosion of rocks. As erosion wore down mountains over thousands of years, carbon was released from rocks and transported by rivers to oceans, where some was reburied in coastal sediments. Along the way, some of the carbon entered the atmosphere as greenhouse gas.
No wonder they slaughtered mammoths, it was to decrease methane emissions!
There weren't even any SUV's or plastic straws.
Man, those Chinese climate hoaxers just don't know when to quit do they?
It's like 10,000 Homer Simpsons farting at the same time. Any idea how much methane gets out in one rip?
"Tempers are wearing thin. Let's just hope some robot doesn't kill everybody." --Bender
The title should be...
Ancient Climate Change Caused Mass Extinction Less Severe Than Projected Future
If we don't do take action soon then in a billion years some creature may be digging up fossils trying to figure out what caused our present mass extinction event.
Anons need not reply. Questions end with a question mark.
That sounds reasonable. A 200,000 year long process now takes 100 years. I hope geological changes speed up the same way. That'd move the next Yellowstone caldera eruption from sometime in the next 600,000 years, to possibly next Thursday. Just enough time to plan an apocalypse party!
Serious? Seriousness is well above my pay grade.
It was warm because it got warm.
Thank you almighty Climate Prophets! What would we do without you!?
We can live anywhere.
[($)]
How can humans be doing anything to climate related now?
All the new climate tax was just using the cover story of a natural weather cycle?
Domestic spying is now "Benign Information Gathering"
"How can humans be doing anything to climate related now?" - Said the retard in broken retard English, stupidly forgetting about the millions and millions of smokestacks, tailpipes, offgassing trash heaps, clearcutting, and all else.
Preying upon the Dinosaurs and forcing them to evolve into birds. They saw their fate coming so implanted the designs for their resurrection into promising mamals so that in the distant future they could be resurrected and begin the cycle anew.
Have you looked closely at the pictures of Henry Ford he's at least three quarters metal.
Of course it doesn't take much to cause warming, there's only a few vehicles on mars and they are solar electric yet that planet is warming.
Ocasio-Cortez just announced we have 12 years until the end of the world.
millennials and people, in gen z, and all these folks that come after us are looking up and we’re like, the world is gonna end in 12 years if we don’t address climate change
Maw! Fire up the karma burner!
As a sanctimonious do gooder that has no clue about what's going on.
14.4F
Or perhaps Americans wouldn't understand 5 to 9C, so 9 to 14.4 it is.
So-- the world was hotter 55 million years ago, which brings up questions before we get into a complex feedback loop theory:
1. Do we know where the Earth's orbit was 55 million years ago? (or do we assume it has been stable/constant?)
2. Do we know the Sun's output 55 million years ago? (or do we assume it was constant, or worse-- model it because we have a theory of the sun's behavior).
So the Earth was kept from an ice age for thousands of years longer, and you are COMPLAINING? That would be salvation for humanity to have thousands of years more not to worry about the return of a major ice age, which would truly deviate crops instead of boosting them as warming periods do.
As it turns out, none of the predicted over-warming signs have come to pass (like the hot spot over the tropics), so we may not even be as lucky as that prior period of time.
"There is more worth loving than we have strength to love." - Brian Jay Stanley
At least with regard to natural disasters
https://ourworldindata.org/upl...
Oddly enough the 1910s were a pretty good decade for not dying from natural disaster, at a guess that might have been because people were too busy dying from WWI and the pandemic of the Spanish Flu
..and now here come the jackasses who will say that since we APPARENTLY we have nothing to do with this, we can all go back to driving gigantic SUVs that get 10MPG and have no emissions controls whatsoever, burn coal, and so on, and so on, and so on. But still we have to ask:
WHAT IF YOU ARE WRONG?!
All you have to do, is fuck up ONCE and it's GAME OVER FOR THE EARTH.
Also: Why the ACTUAL FUCK should it EVER be okay to spew toxic shit into the air you have to breathe? To be WASTEFUL when you have the technology to NOT be wasteful? WHY BE THAT FUCKING STUPID!? So you can live like it's the 1940's forever? WHY!? WHY DO IT!?
Rhetorical questions. There is no reason *why* other than laziness and greed.
I live in a valley. EVERY GODS-BE-DAMNED DAY, even in the middle of winter, the air quality manages to get up at least into the 'Marginal' range, and do you know why? Internal Combustion Engines. ICEs need to GO AWAY FOR GOOD. We do not need them anymore for 100% of our ground transportation, why keep using hundred-plus-year-old technology in 2019?
Fucking humans, I swear..
The current concentration of CO2 in the atmosphere is four parts in ten thousand. It is a trace gas. Understand how incredibly potent a greenhouse gas CO2 would need to be for mankind's contribution to have catastrophic effects! But in fact CO2 is a weak greenhouse gas. Water vapor is far more potent, but we can't tax emissions of that. The "forcing" hypothesis was that increased CO2 might lead to increased H2O and thereby an increased greenhouse effect, but this does not appear to be happening in the real world. Most of the biosphere considers CO2 to be food, and there are beneficial effects to raising CO2. Crop yields rise while agricultural water requirements drop. I think it is amazing that right about the time we're wondering how we're going to feed everyone and provide enough drinking water that along comes CO2, like a godsend, to help address both of these problems.
If erosion wore down mountains in thousands of years, there wouldn't be any mountains on earth.
Looks Like global warming is cyclical happens all all the time. this is not the first time it has happened
that I didn't even bother to read anything other than the first sentence to know it had nothing of value in it. Saved time that did.
I blame farting dinosaurs.
So, yeah, stop with the fake alternative to "CO2 is a plant food" moron.
You've discovered what we've known about for awhile.
Ice ages and inter glacial periods. The warming lasts for quite a long time then goes away and things get cold again. It happens regularly on earth, it has happened before, and it will probably happen again, hopefully people can adapt when the ice comes because I don't think we'll be able to stop it, not easily anyway. But that won't be any time soon.
Someone putting PhD after their name doesn't mean what they say is correct. THAT TOO is a genetic fallacy.
Moreover citing a fallacy instead of a counterargument is also a fallacy. You need to show that that fuckwit pretend scientist is right, not just assert he is as the OP did.
But you don't care about logic or arguments as long as the argument goes the way your feels like, do you, retard?
Correlation does not equal causation. Funny how "science" and its liberal agenda always ignores this simple fact! The only real truth to be found in the world is from the bible. If you want to stop the libtards from controlling your life, banning your video games, confiscating your guns, stopping your free speach and pushing their left wing SJW politics, pick up a bible today and hear the good news that there is hope!
The rest could have been non sentient by our measures (ants, for example, are not counted as sentient, individually). See also the standard AGW denieridiot. Not sentient either.
And guess what? 0% is infinitely less than less than 1%, as a proportion, equally it is infinitely less than 100%.
What do you think the term "very much less than" means if not "less than less"?
Or did language pass you by as you masturbated over the christ pictures in the school bible?
Never try to "prove" shit to idiots.
The important thing about posting in the face of those unwilling to debate or learn, is that you might educate some other readers on the fence, even if the idiot learns nothing...
Interesting that I am the only person posting educational links, I wonder what that says about the desire of others to teach vs. preach.
"There is more worth loving than we have strength to love." - Brian Jay Stanley
None of the claims in that Wiki post address what the article I posted was saying. It's not saying there is no warming - it's saying proof of DANGEROUS rates of warming, like the hot spot over the tropics, have not occurred as they were predicted. In short all of the worst effects of warming that were supposed to cause real issues have not happened, and in fact what is happening is causing weather to become less severe, not more... none of that is addressed by your religious Wiki page.
"There is more worth loving than we have strength to love." - Brian Jay Stanley
Can someone get Al Gore out here to fact check this please?
Not only that...white man LOL. Gee, "global warming" happened before the industrial revolution...go figure.
IPCC = total frauds. Enjoy your hockey stick graph, you cock-smoking teabaggers.
that cars are powered by people's breathing...???
1) We're the cause of MORE THAN 100% of the warming since 1850. Most of the feedbacks aren't man made, but they respond to our forcings just like the respond to any other forcing.
2) They're very accurate. Hansen's 1988 paper would have been spot on if the climate sensitivity had been 3.2C/doubling rather than 3.4 as he predicted in his model.
3) We did it. We can stop doing it. In what way is not stopping impossible?
They predicted a major terrorist act by plane. So since THEY predicted "the end of the world" just as much as AOC did or the IPCC reports say (IOW nothing of the sort, just how X will happen in less than Y years),they were wrong, hm?
> We're the cause of MORE THAN 100% of the warming since 1850.
I deny this completely.
We did. Turns out ManBearPig is REAL. I'm super cereal.