When
3:30 p.m., Oct. 28, 2008
Where
Kuiper Space Sciences Building 308
Assistant Professor Alexander Pavlov (LPL) is the scheduled speaker.
Snowball (100% ice cover) glaciations caused the most severe stress to the biosphere in the entire Earth history. Such glaciations should be expected on the water-rich extrasolar planets. Therefore, it is important to understand the duration of such glaciations and the recovery mechanisms.
I will report on our new measurements of the elevated Ir levels at the Neoproterozoic glacial boundary which were used as an argument in favor of the â€hard†and long-lasting Snowball events.
I will show that the standard Snowball recovery mechanism (CO2 accumulation) has a fundamental problem because of the CO2 condensation in the polar regions. I propose that the abrupt release of methane clathrates could be a trigger for the Earth’s breakout from global glaciations
Snowball (100% ice cover) glaciations caused the most severe stress to the biosphere in the entire Earth history. Such glaciations should be expected on the water-rich extrasolar planets. Therefore, it is important to understand the duration of such glaciations and the recovery mechanisms.
I will report on our new measurements of the elevated Ir levels at the Neoproterozoic glacial boundary which were used as an argument in favor of the â€hard†and long-lasting Snowball events.
I will show that the standard Snowball recovery mechanism (CO2 accumulation) has a fundamental problem because of the CO2 condensation in the polar regions. I propose that the abrupt release of methane clathrates could be a trigger for the Earth’s breakout from global glaciations
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