Estimate the average surface temperature of the Earth when the Sun was 40% dimmer, 4 billion years ago. Your estimate do

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answerhappygod
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Estimate the average surface temperature of the Earth when the Sun was 40% dimmer, 4 billion years ago. Your estimate do

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Estimate the average surface temperature of the Earth when theSun was 40% dimmer, 4 billion years ago. Your estimate does notinclude the effects of the greenhouse gases (carbon dioxide andwater vapor). Use A = 0.33 for the Earth’s albedo. Assuming thatthe actual temperature of our planet was the same in the past as itis today, compare the strength of the greenhouse effect today vs.its value 4 billion years ago. How different would the Earth’satmosphere have been so as to achieve that level of greenhouse?
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