The Snowball Earth Hypothesis - Atmospheric and Oceanic Sciences

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Paper 2: On Initiation of a Snowball EarthSolar luminosity theory• Change in solar luminosity caused totalglaciation?• Stellar evolution models suggest that theluminosity of the sun has increased by ~40%over Earth’s history and was ~7% lessluminous than today during theNeoproterozoic
However…• If this were the case why then were totalglaciations non-existent prior to theNeoprotetozoic when the sun was evendimmer?• This may be a contributing factor, but is notthe sole cause of the Neoprotetozoicglaciation
Page 5: Neoproterozoic Snowball Era• This
Page 11: Conclusions from Paper 1• Widespr
Page 15 and 16: Therefore…• There is more evide
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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