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| Titel |
Estimating RothC carbon pools from standard TOC combustion data only |
| VerfasserIn |
Lutz Weihermueller, Karin Steffens, Harry Vereecken |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250032495
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| Zusammenfassung |
| Knowledge of the soil carbon turnover is essential to predict global climate change impact on
terrestrial carbon stocks. For the prediction of carbon turnover and the calculation of carbon
dioxide efflux from the soil to the atmosphere various models are available, whereby the
RothC model is widely used. The RothC model is based on the turnover of different carbon
pools, which are measureable by a certain fractionation scheme. Nevertheless, the
fractionation is tedious and cost intensive. Especially, if large scale models (e.g. on
regional scales) will be run, carbon pool estimation is nearly impossible by the
fractionation technique. Therefore, we analyzed the feasibility of using standard TOC
combustion data only for pool size determination. In a first step, we determined the
carbon pools according to the procedure proposed by Skjemstad et al. (2004). In a
second step, we analyzed the TOC combustion curves from the same probes and
finally correlated specific combustion temperatures to individual carbon pools. In a
last step, we analyzed the uncertainty of the new procedure using a virtual field
experiment modeled with the coupled SOILCO2/RothC model (Hebst et al. 2008). |
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