[QUOTE][QUOTE][IMG]http://images.sciencedaily.com/2013/04/130422154919-large.jpg?1366664035[/IMG][/QUOTE]Nearly 34 million years ago, Earth underwent a transformation from a warm, high-carbon dioxide "greenhouse" state to a lower-CO2, variable climate similar to the modern "icehouse" world. Massive ice sheets grew across the Antarctic continent, major animal groups shifted, and ocean temperatures decreased by as much as 5 degrees.
Journal:
Michael T. Hren, Nathan D. Sheldon, Stephen T. Grimes, Margaret E. Collinson, Jerry J. Hooker, Melanie Bugler, and Kyger C. Lohmann. Terrestrial cooling in Northern Europe during the Eocene–Oligocene transition. PNAS, 2013 DOI: [url]http://dx.doi.org/10.1073/pnas.1210930110[/url]
Source:
[URL]http://www.sciencedaily.com/releases/2013/04/130422154919.htm[/URL][/QUOTE]
Interesting, though I thought the connection between CO2 and temperature (both in the ocean and on land) was well-established long before this.
[quote]Ice-sheet growth, coupled with favorable changes in Earth's orbit, pushed the planet past a climatic tipping point and led to both the rapid buildup of a permanent ice sheet in the Antarctic and much larger changes in global climate, says Hren.[/quote]
[quote]Studies have shown that before this drastic cooling event, Earth's atmosphere contained 1,000 parts per million (ppm) of CO2 or more, and by the end of the transition, it was likely lower than 600-700 ppm. Some predictions, notes Hren, suggest that Earth's current CO2 concentrations, currently at close to 400 ppm and climbing, could increase to nearly 1,000 ppm in the next 100 years.
If that turns out to be the case, it's likely that temperature changes on the scale of the Eocene to Oligocene could occur -- but in the other direction, toward a much warmer climate that could again fundamentally alter living things on Earth.[/quote]
Hmm, so it says CO2 is potentially linked, but then just says "but in the other direction, toward a much warmer climate that could again fundamentally alter living things on Earth.", without giving real "evidence" as to why it might be so.
It also does not state it is human caused.
[QUOTE=glitchvid;40383539]Hmm, so it says CO2 is potentially linked, but then just says "but in the other direction, toward a much warmer climate that could again fundamentally alter living things on Earth.", without giving real "evidence" as to why it might be so.
It also does not state it is human caused.[/QUOTE]
but the purpose of this wasnt about whether or not humans are causing anything. that isn't what they set out to do so why would they say anything of it
Humans don't cause global warming, it's a natural phenomena- we are simply accelerating it by putting CO2 into the atmosphere through the burning of fossil fuels and such.
The disadvantage is that we're accelerating it faster than most animals can adapt to it. Such as sea levels rising and killing off coral reefs.
So, you remember when they talked about these meter wide spiders that died out loooooooooong ago?
And how they apparently couldn't live anymore because the atmosphere became too cold and light, for them?
[editline]23rd April 2013[/editline]
I like spiders.
[QUOTE=Awesomecaek;40388051]So, you remember when they talked about these meter wide spiders that died out loooooooooong ago?
And how they apparently couldn't live anymore because the atmosphere became too cold and light, for them?
[editline]23rd April 2013[/editline]
I like spiders.[/QUOTE]
There probably isn't a high enough oxygen concentration for them anymore, there used to be monster dragon flies too.
[QUOTE=Pierrewithahat;40388084]There probably isn't a high enough oxygen concentration for them anymore, there used to be monster dragon flies too.[/QUOTE]
Where has the oxygen gone?
[QUOTE=Awesomecaek;40388099]Where has the oxygen gone?[/QUOTE]
It hasn't gone anywhere, it's fused with other elements or become trapped.
[QUOTE=Awesomecaek;40388051]So, you remember when they talked about these [B]meter wide spiders [/B]that died out loooooooooong ago?
And how they apparently couldn't live anymore because the atmosphere became too cold and light, for them?[/QUOTE]
Thank god for climate change
[QUOTE=barttool;40388487]Thank god for climate change[/QUOTE]
This man has the right idea.
[QUOTE=barttool;40388487]Thank god for climate change[/QUOTE]
The idea I had is that, well, if I understand it right, the climate is slowly reverting to it's previous state, with the ice caps melting and stuff.
I am wondering how much genetic help would spiders need to grew so big again.
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