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A simple method for estimating the influence of eroding soil profiles on atmospheric CO2
Billings, Sharon A. Buddemeier, Robert W. Richter, Daniel deB.
Billings, Sharon A.
Buddemeier, Robert W.
Richter, Daniel deB.
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Abstract
Although soil erosion has often been considered a net source of atmospheric carbon
(C), several recent studies suggest that erosion serves as a net C sink. We have developed
a spreadsheet‐based model of soil organic C dynamics within an eroding profile (Soil
Organic Carbon, Erosion, Replacement, and Oxidation (SOrCERO)) that calculates effects
of soil organic carbon (SOC) erosion and altered SOC oxidation and production on the net
exchange of C between the eroding profile and atmosphere. SOrCERO suggests that
erosion can induce a net C sink or source, depending on management practices, the extent
to which SOC oxidation and production characteristics change with erosion, and the fate of
eroded SOC. Varying these parameters generated a wide range of C source and sink
estimates (maximum net source and sink of 1.1/3.1 Pg C yr−1 respectively, applying results
globally), highlighting research needs to constrain model estimates. We invite others to
download SOrCERO (http://www.kbs.ku.edu/people/staff_www/billings/index.html) to
test conceptual models and eroding soil profiles of interest in a consistent, comparable
fashion.
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This published article is © American Geophysical Union and can found on the publisher's website at http://dx.doi.org/10.1029/2009GB003560
Date
2010-04
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American Geophysical Union
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Billings, S. A., R. W. Buddemeier, D. deB. Richter, K. Van Oost, and G. Bohling (2010), A simple method for
estimating the influence of eroding soil profiles on atmospheric CO2, Global Biogeochem. Cycles, 24, GB2001,
http://dx.doi.org/10.1029/2009GB003560