The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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Continents near the equator theory• A concentration of land in the tropics wouldcontribute to lower CO2 due to increasedchemical weathering rates• Increased chemical weathering rates occur inthe tropics because chemical processes areaccelerated by higher temperatures• Lower rates of CO2 in the atmosphere wouldthen lead to a gradually colder climate
Therefore…• There is more evidence for low latitudecontinental distribution during theNeoproterozoic with no evidence for largecontinental area at high latitudes than for anyother time in Earth history
Page 5: Neoproterozoic Snowball Era• This
Page 11 and 12: Conclusions from Paper 1• Widespr
Page 13: However…• If this were the case
Page 17 and 18: Carbon Isotope Theory• Marine mic
Page 19 and 20: No light - No photosynthesis!• Th
Page 21 and 22: Did this methane contain high level
Page 23 and 24: Conclusions:Four proposed stages of
Page 25 and 26: Conclusions…
Page 27 and 28: Vostok delta TS4oC2HoloceneIntergla
Page 29 and 30: Vostok CH47006506005505004504003503
Page 31: References• Schrag, Daniel P., Be

The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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