steveox
Well-Known Member
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 findings are detailed in a recent paper published in the journal Proceedings of the National Academy of Sciences.
During the Jurassic Period, dinosaurs — ranging from the plant-eating Diplodocus and Brachiosaurus to the meat-craving Ceratosaurus and Megalosaurus — ruled the world. During this time, the Earth's interior was not standing still; rather, the supercontinent Pangaea had started to split into two smaller landmasses, called Laurasia and Gondwana.
These tectonic movements made the oceans close up and the tectonic plates sink into the Earth. This process, called subduction,led to volcanism at the surface, with rocks constantly melting and emitting CO2 into the atmosphere. Huge amounts of this greenhouse gas made the climate during the Jurassic Period extremely humid and warm, said geoscientist Douwe van der Meer, lead author of the study and a researcher at Utrecht University in the Netherlands. [Weather vs. Climate: Test Yourself]
Scientists have known for some time that a large amount of volcanic activity results in more CO2 than is present on Earth today, but with previous methods, it had been tricky to come up with a reliable estimate.
http://news.yahoo.com/dinosaur-era-had-5-times-todays-co2-212124284.html
And Liberals say Climate change is real? Even Penn & Tell said its bullshit!
The findings are detailed in a recent paper published in the journal Proceedings of the National Academy of Sciences.
During the Jurassic Period, dinosaurs — ranging from the plant-eating Diplodocus and Brachiosaurus to the meat-craving Ceratosaurus and Megalosaurus — ruled the world. During this time, the Earth's interior was not standing still; rather, the supercontinent Pangaea had started to split into two smaller landmasses, called Laurasia and Gondwana.
These tectonic movements made the oceans close up and the tectonic plates sink into the Earth. This process, called subduction,led to volcanism at the surface, with rocks constantly melting and emitting CO2 into the atmosphere. Huge amounts of this greenhouse gas made the climate during the Jurassic Period extremely humid and warm, said geoscientist Douwe van der Meer, lead author of the study and a researcher at Utrecht University in the Netherlands. [Weather vs. Climate: Test Yourself]
Scientists have known for some time that a large amount of volcanic activity results in more CO2 than is present on Earth today, but with previous methods, it had been tricky to come up with a reliable estimate.
http://news.yahoo.com/dinosaur-era-had-5-times-todays-co2-212124284.html
And Liberals say Climate change is real? Even Penn & Tell said its bullshit!
