Biotic enhancement of weathering and the habitability of Earth

@article{Schwartzman1989BioticEO,
  title={Biotic enhancement of weathering and the habitability of Earth},
  author={David Schwartzman and Tyler Volk},
  journal={Nature},
  year={1989},
  volume={340},
  pages={457-460}
}
AN important question in the Earth sciences is the role of the biota in the chemical weathering of silicate rocks, which affects atmospheric CO2 and therefore climate1-10. No comprehensive study of biotic influences, however, has quantitatively examined the climatic consequences were weathering to take place under completely abiotic conditions. Here we calculate that if today's weathering is 10, 100 or 1,000 times the abiotic weathering rate, then an abiotic Earth would be, respectively, ∼15… 
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There has been considerable controversy concerning the role of chem- ical weathering in the regulation of the atmospheric partial pressure of carbon dioxide, and thus the strength of the greenhouse
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The question addressed here is whether global chemical weathering and erosion rates have increased over Cenozoic time in response to uplift of the Himalayas.1–2 Chemical weathering of the continents
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