Homework 6 - AOSS 105: Homework 6 1. Explain how the...

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AOSS 105: Homework 6 1. Explain how the snowball earth could have formed and how it might have recovered. Snowball Earth could have formed by an extended cold spell, causing the oceans to freeze, starting near the poles. Lowered reflectivity causes further cooling to occur, resulting in “snowball earth.” The carbon dioxide cycle in the oceans stops, while carbon dioxide out gassed by volcanoes builds up. Strong greenhouse effect then melts the “snowball Earth,” resulting in “hothouse Earth.” The carbon dioxide cycle restarts, pulling carbon dioxide back into the oceans, reducing the greenhouse effect to normal. 2. Describe the ‘Faint Young Sun Paradox’, and briefly discuss two of the possible solutions. The Faint Young Sun Paradox is the sun gets brighter as it ages. The luminosity increase is a direct consequence of the density change caused by the conversion of hydrogen into helium. Two possible solutions to this problem are: the Earth’s greenhouse effect was larger in the past or the planetary albedo has been lower in the past. If the second one was true, the albedo in the past according to the planetary
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This note was uploaded on 04/02/2008 for the course AOSS 105 taught by Professor Keeler during the Winter '08 term at University of Michigan.

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Homework 6 - AOSS 105: Homework 6 1. Explain how the...

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