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| Titel |
Using radiocarbon as a high-frequency tracer of forest CO2 emissions sources: preliminary results from a Northern Wisconsin case study |
| VerfasserIn |
C. L. Phillips, K. J. McFarlane, A. R. Desai, D. Risk |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069532
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| Zusammenfassung |
| Radiocarbon represents a potentially sensitive natural tracer for detecting contributions of soil
carbon to whole forest CO2 emissions. We are monitoring the 14C abundance in soil and
whole ecosystem CO2 emissions from a Northern Wisconsin deciduous hardwood forest, to
1) examine how the age of soil carbon emissions varies at high frequencies (weekly to
seasonal timescales), and 2) ascertain whether soil carbon dynamics can be detected in the
14C abundance of CO2 at higher atmospheric levels (30 m and 450 m). Preliminary results
suggest 14C abundance in CO2 above the forest canopy does vary substantially, and is
consistent with changing contributions from forest respiration as well as fossil fuel emissions.
Measurements and modeling suggest the age of soil CO2 emissions likely varies in response
to abiotic drivers (moisture, temperature) as well as biotic drivers (plant activity). |
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