Estimating regional changes in soil carbon with high spatial resolution

Tristram O. West, Craig C. Brandt, Bradly S. Wilson, Chad M. Hellwinckel, Donald D. Tyler, Gregg Marland, Daniel G. De La Torre Ugarte, James A. Larson, Richard G. Nelson

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37 Citas (Scopus)


To manage lands locally for C sequestration and for emissions reductions, it is useful to have a system that can monitor and predict changes in soil C and greenhouse gas emissions with high spatial resolution. We are developing a C accounting framework that can estimate C dynamics and net emissions associated with changes in land management. One component of this framework integrates field measurements, inventory data, and remote sensing products to estimate changes in soil C and to estimate where these changes are likely to occur at a subcounry (30- by 30-m) resolution. We applied this framework component to a midwestern region of the United States that consists of 679 counties approximately centered around Iowa. We estimated the 1990 baseline soil C to a maximum depth of 3 m for this region to be 4117 Tg. Cumulative soil C accumulation of 70.3 Tg was estimated for this region between 1991 and 2000, of which 33.8 Tg is due to changes in tillage intensity. Without accounting for soil C loss following changes to more intensive tillage practices, our estimate increases to 45.0 Tg C. This difference indicates that on-site permanence of soil C associated with a change to less intensive tillage practices is approximately 75% if no additional economic incentives are provided for soil C sequestration practices. This C accounting framework offers a method to integrate inventory and remote sensing data on an annual basis and to transparently account for alternating annual trends in land management and associated C stocks and fluxes.
Idioma originalInglés
Páginas (desde-hasta)285-294
Número de páginas10
PublicaciónSoil Science Society of America Journal
EstadoPublicada - 1 mar. 2008
Publicado de forma externa


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