Fire-derived organic carbon in soil turns over on a centennial scale
| Autor: | N. Singh, S. Abiven, M. S. Torn, M. W. I. Schmidt |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Biogeosciences, Vol 9, Iss 8, Pp 2847-2857 (2012) |
| Druh dokumentu: | article |
| ISSN: | 2847-2012 1726-4170 1726-4189 |
| DOI: | 10.5194/bg-9-2847-2012 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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