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| Titel |
Fire-derived organic carbon in soil turns over on a centennial scale |
| VerfasserIn |
N. Singh, S. Abiven, M. S. Torn, M. W. I. Schmidt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 8 ; Nr. 9, no. 8 (2012-08-01), S.2847-2857 |
| Datensatznummer |
250007221
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| Publikation (Nr.) |
 copernicus.org/bg-9-2847-2012.pdf |
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| Zusammenfassung |
| Pyrogenic carbon (PyC), the residue of an incomplete combustion of biomass,
is considered as a carbon (C) sink due to its assumed stability in soil. PyC
turnover time estimated using two modelling approaches, based on data from 16
published studies (n = 54) on PyC degradation, ranged from a decadal to
centennial time scale, varying with initial biomass type, pyrolysis
temperature, and incubation or field study. The average turnover time using a one-pool
approach was 88 y, and the best estimate using a two-pool approach was 3 y for a fast-cycling pool and 870 y for a slow-cycling pool. Based on
this meta-analysis, PyC cannot be assumed to persist in soils for thousands
of years, and its use as a strategy for offsetting carbon emissions requires
prudence and further research. |
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