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Science Hypothesis says we have extra 1.3 billion years on Earth
Science Hypothesis says we have extra 1.3 billion years on Earth | Hypothesis says we have extra 1.3 billion years on Earth |
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| by William Atkins | |
| Monday, 15 June 2009 | |
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Page 2 of 3 The June 11, 2009 press release “Caltech Scientists Predict Greater Longevity for Planets with Life,” from California Institute of Technology (CalTech), “Earth maintains its surface temperatures through the greenhouse effect. Although the planet's greenhouse gases—chiefly water vapor, carbon dioxide, and methane-have become the villain in global warming scenarios, [key point] they're crucial for a habitable world, because they act as an insulating blanket in the atmosphere that absorbs and radiates thermal radiation, keeping the surface comfortably warm.” Featured Whitepaper
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Science DiscussionsThey state, "… we're nearing the point where there's not enough carbon dioxide left to regulate temperatures following the same procedures." [CalTech] However, the scientists say another factor should be considered: atmospheric pressure. They suggest that atmospheric pressure could be substantially reduced if large amounts of molecular nitrogen (which makes up over three-quarters of the atmosphere) disappear. This lowering of our atmospheric pressure would better control surface temperatures and allow carbon dioxide to remain in the atmosphere. Page three continues. |
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