The Sun and Earth in the distant future What happens to life, and when
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The Sun and Earth in the distant future What happens to life, and when? The Earth is swallowed ~0.5 million years before the RGB tip, or about 7.59 Gy in the future But increased solar irradiation acts much faster – even without increased CO2, the rise in temperature will cause evaporation of the oceans to start – and water vapour is another greenhouse gas A moist greenhouse effect will continue until the oceans have boiled dry (Laughlin, Sky & Telescope, June 2007, p.32) Solar UV will then dissociate the water molecules, and the hydrogen will escape, leaving the Earth a lifeless dust-bowl The subsequent dry greenhouse effect will raise the temperature further until the Earth is essentially a molten ball Timescale is ~1 Gy – so life will disappear long before the Earth does.Слайд 11 из презентации «The Sun and Earth in the distant future»
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