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  A new model for soil organic carbon turnover using bomb carbon

Hahn, V., & Buchmann, N. (2004). A new model for soil organic carbon turnover using bomb carbon. Global Biogeochemical Cycles, 18(1), GB1019. doi:10.1029/2003GB002115.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-D1A3-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-696A-F
Genre: Journal Article

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http://dx.doi.org/10.1029/2003GB002115 (Publisher version)
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 Creators:
Hahn, V.1, Author              
Buchmann, N.1, Author              
Affiliations:
1Research Group Biodiversity Ecosystem, Dr. N. Buchmann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497759              

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Free keywords: c-14 Forest Soc turnover Soil United-states Radiocarbon Matter Dynamics Age Fluxes Pools Rates
 Abstract: A new model is presented that uses bomb carbon (C-14 enrichment) to calculate the turnover times of active soil organic carbon (SOC). The new approach overcomes major deficiencies of older models, particularly in respect to the C-14 content of carbon input to SOC and of carbon output from SOC. Calculated turnover times of active carbon for ten European forest sites ranged from 4.0 to 15.1 years with a mean of 8.2 years. The model was successfully validated in soil incubation experiments, where the measured (14C) content of (microbially) respired CO2 was on average 9.6% (DeltapM) higher than that of bulk SOC, but agreed considerably well with the modeled C-14 content. Furthermore, we used the model's sensitivity tests to show that over long time periods (decades), soils can only sequester small amounts of carbon. [References: 29]

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 Dates: 2004
 Publication Status: Published in print
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 Identifiers: DOI: 10.1029/2003GB002115
Other: BGC0665
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Title: Global Biogeochemical Cycles
Source Genre: Journal
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Publ. Info: Washington, DC : American Geophysical Union
Pages: - Volume / Issue: 18 (1) Sequence Number: - Start / End Page: GB1019 Identifier: CoNE: /journals/resource/954925553383
ISSN: 0886-6236