NAI Director's Seminar "New and Emerging Perspectives on Late Precambrian 'Snowball Earth' Glaciation"
Speaker: Tim Raub (Yale University), Date/Time: Monday, February 26, 2007 11AM PST
Background: Using atmospheric chemical models of a Snowball Earth, scientists from NAI's Alumni Virtual Planetary Laboratory Team showed that, during long and severe glacial intervals, a weak hydrological cycle coupled with photochemical reactions involving water vapor would give rise to the sustained production of hydrogen peroxide. The peroxide, upon release from melting ice into the oceans and atmosphere at the end of the snowball event, could mediate global oxidation events.
For more information and participation instructions, visit: http://nai.arc.nasa.gov/seminars/seminar_detail.cfm?ID=99 [Source: Astrobiology Institute Newsletter]