Randolph Kinney
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- Apr 7, 2005
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"Dinosaurs that roamed the Earth 250 million years ago knew a world with five times more carbon dioxide than is present on Earth today, researchers say, and new techniques for estimating the amount of carbon dioxide on prehistoric Earth may help scientists predict how Earth's climate may change in the future.
The aim has been to demonstrate how variations in plate tectonics have led to variations in CO2 emissions from volcanoes 250 million years ago."
I see a Climate Scientist's frog conclusion coming. These guys have to account for natural variation in CO2 levels before humans.
The researchers then quantified the plates that have sunk into the deep Earth, and their calculations showed that the Earth produced twice as much CO2 as there is today.
The scientists then inserted this number into a comprehensive, commonly used paleoclimate model, to calculate how all the volcanic CO2 emissions at the time would have added up. Because there was also less CO2 being removed from the atmosphere by vegetation and by weathering rocks than today, total atmospheric CO2 levels were probably five times higher than at the present, the researchers said.
"We are now producing more CO2 than all volcanoes on Earth," van der Meer added.
And the frog became deaf because of human caused CO2 levels exceeded that which was produced by volcanoes.
The aim has been to demonstrate how variations in plate tectonics have led to variations in CO2 emissions from volcanoes 250 million years ago."
I see a Climate Scientist's frog conclusion coming. These guys have to account for natural variation in CO2 levels before humans.
The researchers then quantified the plates that have sunk into the deep Earth, and their calculations showed that the Earth produced twice as much CO2 as there is today.
The scientists then inserted this number into a comprehensive, commonly used paleoclimate model, to calculate how all the volcanic CO2 emissions at the time would have added up. Because there was also less CO2 being removed from the atmosphere by vegetation and by weathering rocks than today, total atmospheric CO2 levels were probably five times higher than at the present, the researchers said.
"We are now producing more CO2 than all volcanoes on Earth," van der Meer added.
And the frog became deaf because of human caused CO2 levels exceeded that which was produced by volcanoes.
