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29-Mar-2004

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A 'Snowball Earth' Climate Triggered By Continental Break-Up, Nature
 









Excerpts: Geological and palaeomagnetic studies indicate that ice sheets may
have reached the Equator at the end of the Proterozoic eon, 800 to 550 million
years ago, leading to the suggestion of a fully ice-covered 'snowball Earth'.
Climate model simulations indicate that such a snowball state for the Earth
depends on anomalously low atmospheric carbon dioxide concentrations, in
addition to the Sun being 6 per cent fainter than it is today. (...) This
indicates that tectonic changes could have triggered a progressive transition
from a 'greenhouse' to an 'icehouse' (...).
Source: A 'Snowball Earth' Climate Triggered By Continental Break-Up[
http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v428/n6980/abs/nature02408_fs.html
], Yannick Donnadieu, Yves Goddéris, Gilles Ramstein, Anne Nédélec, Joseph
Meert, DOI: 10.1038/nature02408, Nature 428, 303 - 306, 04/03/18

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