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NAS reports: 50 million year cooling trend
Peter N. Spotts
The Christian Science Monitor
Friday, Sept 26, 2008
With all the focus on human-triggered global warming, it may be hard to imagine that the world is riding a 50-million-year-long cooling trend.
But it is, and blame the trend on a continental-scale collision, say geophysicists Dennis Kent of Rutgers University and Giovanni Muttoni of the University of Milan in Italy.
Researchers say there is strong evidence that increases in atmospheric CO2 contributed to a warm spell 50 million years ago dubbed the Early Eocene climate optimum – the warmest period in 65 million years. But over the following 15 million years, deep sea temperatures fell by about 10.8 degrees F., reflecting a significant cooling at the surface. This cooling ultimately allowed the cycle of ice ages to emerge.
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Drs. Kent and Muttoni have mined paleomagnetic and other data and suggest that atmospheric CO2 dropped because India collided with Eurasia, shutting down a productive, natural CO2 factory.
Some 120 million years ago, the subcontinent that is now India was migrating north from Antarctica. As it moved, it shoved the ocean crust that was ahead of it under an existing crustal plate. As long as this zone off the Eurasian coast was under water, bottom muck enriched by carbon from the biologically-rich ocean plunged under the plate. It got recycled as lava in volcanoes along a geological feature dubbed the Kohistan Arc, as well as in a vast lava-oozing formation called the Deccan Traps. The eruptions released the carbon as CO2, which helped warm the climate. But once India collided with Eurasia 50 million years ago, India rode over the top of the zone and shut off the process. This, plus changes in ocean circulation as continents rearranged themselves, contributed to the long chill, the researchers suggest.
The results appear in the current issue of the Proceedings of the National Academy of Sciences.
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12 Responses to “NAS reports: 50 million year cooling trend”
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September 26th, 2008 at 9:27 am
Yeah, it goes up and down but over-all down…take this as standard and you can state truthfully that this planet is in a cooling trend ever since its conception 4.5 billion years ago…and will remain so until the sun goes into it’s red giant phase…
/HTH…
September 26th, 2008 at 10:02 am
That’s quite interesting, especially since the earth is only about 10,000 years old, give or take an eon.
September 27th, 2008 at 10:09 am
I’ve been here for over a 100,000 years so I can tell you that the 10,000 thing is pushing it. Maybe you ought to go back to the Prez Election.
September 27th, 2008 at 12:08 pm
Do not listen to Howard’s infidel suggestion that the earth is 10,000 years old. It is only 6000 years old. All evidence to the contrary is merely a trap set by Satan to test our Biblical faith. Sarah Palin told me so.
September 27th, 2008 at 8:48 pm
10-14-2008 We will reveal ourselves to you in your atmosphere. There are those within your government’s who have concealed knowledge of us. Our command ship is 2k miles in length and will be visible by many nation’s. Though they will tell you we are invading, know we come in peace…
September 28th, 2008 at 9:18 am
Don’t be silly, Peak Oil is Real. Palin is simply an illusion – as is all of this. As your God, I created the World yesterday and fed you false memories of a past for entertainment value. Was particularly pleased when I thought up Creationists – glad you enjoyed the joke.
September 29th, 2008 at 1:08 pm
http://nl.youtube.com/watch?v=ErLCwMvh8GM
September 29th, 2008 at 3:17 pm
This is what Alex sounds like SNORT SNORT SNORT SNORT
September 29th, 2008 at 6:31 pm
Lets cloud the water eh? The temperatures have dropped over 50 million years and the sun has got warmer!
So, why is it the temperatures dropped over this period? BECAUSE THERE *WAS* A DROP IN CO2 LEVELS! So the cooling was because of a drop in CO2! There is no disparity here – unless you are a right winger of course – or a totally insane Watson brother!
CO2 levels are now rising again and so are temperatures! Go back to sleep Jones Fans! Global warming is real AND MAN MADE!
September 29th, 2008 at 6:39 pm
And how do they know what will happen in that amount of time? They make the shit up.
September 29th, 2008 at 9:56 pm
Something tells me this is true. If you think about it, the sun only has a finite amount of fuel. Once it’s gone, it’s gone.
Fortunately, it takes a billion years for the sun to burn out.
January 8th, 2009 at 8:23 am
Global warming – another scam by Zionists