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Paper 1 - Danieil Nechamkin Origins Snowball Earth While we...

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Danieil Nechamkin Origins: Snowball Earth While we recognize today’s Earth as being warm in climate, it has not always been. When we look back on the Earth’s recent past, we commonly draw reference to the most recent ice age 21,000 years ago. Thirty percent of the Earth was covered in ice. However, we can look even farther into the past to notice that an ice age that occurred 600 million years ago was far more dramatic. Harland, a Cambridge scientist, noticed through glacial deposits that during the Neoproterozoic ice age glaciers reached the tropic zone near the equator. Many have wondered how this could happen. After mathematical procedures, it was found out that snow reflects more radiation back into space than do other earthly substances. Therefore the large amount of snow that existed at the poles may have generated a global supercooling. This cooling would create more snow, which would create more and more cooling, creating a vicious cycle, ending in a completely frozen planet.
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