How Earth's atmosphere evolved to an oxic state: A status report

Claire, Mark W.; Catling, David C.

doi:10.1016/j.epsl.2005.06.013

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How Earth's atmosphere evolved to an oxic state: A status report

Author(s): David C. Catling , Mark W. Claire

Publication date Created: August 2005

Publication date (Print): August 2005

Journal: Earth and Planetary Science Letters

Publisher: Elsevier BV

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Primary Production of the Biosphere: Integrating Terrestrial and Oceanic Components

C Field (1998)

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Global silicate weathering and CO2 consumption rates deduced from the chemistry of large rivers

P Louvat, B. Dupré, J. Gaillardet … (1999)

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A neoproterozoic snowball earth

Hoffman, Kaufman, Halverson … (1998)

Negative carbon isotope anomalies in carbonate rocks bracketing Neoproterozoic glacial deposits in Namibia, combined with estimates of thermal subsidence history, suggest that biological productivity in the surface ocean collapsed for millions of years. This collapse can be explained by a global glaciation (that is, a snowball Earth), which ended abruptly when subaerial volcanic outgassing raised atmospheric carbon dioxide to about 350 times the modern level. The rapid termination would have resulted in a warming of the snowball Earth to extreme greenhouse conditions. The transfer of atmospheric carbon dioxide to the ocean would result in the rapid precipitation of calcium carbonate in warm surface waters, producing the cap carbonate rocks observed globally.