Estimating regional changes in soil carbon with high spatial resolution
West, TO; Brandt, CC; Wilson, BS; Hellwinckel, CM; Tyler, DD; Marland, G; De La Torre Ugarte, DG; Larson, JA; Nelson, RG
| HERO ID | 3240312 |
|---|---|
| In Press | No |
| Year | 2008 |
| Title | Estimating regional changes in soil carbon with high spatial resolution |
| Authors | West, TO; Brandt, CC; Wilson, BS; Hellwinckel, CM; Tyler, DD; Marland, G; De La Torre Ugarte, DG; Larson, JA; Nelson, RG |
| Journal | Soil Science Society of America Journal |
| Volume | 72 |
| Issue | 2 |
| Page Numbers | 285-294 |
| Abstract | 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 subcounty (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. |
| Doi | 10.2136/sssaj2007.0113 |
| Wosid | WOS:000254060200001 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |