Inclusion of the Weathering of Volcanic Rocks in the GEOCARBSULF Model

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ID: 293388
2006
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Abstract
The carbon cycle model GEOCARBSULF is extended by dividing the weathering of silicates into volcanic and non-volcanic rocks. The proportion of volcanic weathering is calculated as a function of time from the oceanic record of ^87^Sr/^86^Sr. The volcanic proportion is then used to modify the equations for calculating atmospheric CO~2~ by the addition of a new non-dimensional volcanic weathering factor. The effect of uplift and physical erosion on weathering is also modified by using only the distribution over time of the abundance of sandstones and shales, and not Sr isotopic data that had been used previously. Results indicate moderate change from GEOCARBSULF in the distribution of atmospheric CO~2~ over Phanerozoic time. This includes an increased minimum in CO~2~ during the Late Ordovician, in agreement with the presence of a continental glaciation at that time, and a shift of maximum Mesozoic values from the Jurassic to the Early Cretaceous.
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openalex_W2014949335 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Robert A. Berner
Journal american journal of science
Year 2006
DOI
10.2475/05.2006.01
URL
https://ajs.scholasticahq.com/article/61594.pdf
Keywords Keywords not found

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