Deutsch
 
Benutzerhandbuch Datenschutzhinweis Impressum Kontakt
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Isotopic composition of H2 from wood burning: Dependency on combustion efficiency, moisture content, and δD of local precipitation

MPG-Autoren
/persons/resource/persons62345

Brand,  Willi A.
Service Facility Stable Isotope, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society;

Externe Ressourcen
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Röckmann, T., Alvarez, C. X. G., Walter, S., Van Der Veen, C., Wollny, A. G., Gunthe, S. S., et al. (2010). Isotopic composition of H2 from wood burning: Dependency on combustion efficiency, moisture content, and δD of local precipitation. Journal of Geophysical Research-Atmospheres, 115, D17308. doi:10.1029/2009jd013188.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-DAA2-4
Zusammenfassung
Differences in isotopic composition between the various sources of H-2 are large, but only a few measurements have been carried out to constrain them. Two conflicting values have been published for H-2 from biomass burning. Both rely on the assumption that the isotopic composition of H-2 should scale with the isotopic composition of the precipitation at the location where the biomass grew. Here we test this hypothesis using 18 wood samples collected from various locations around the globe. The sample locations cover a range of delta D content of H-2 in precipitation, from below -120 parts per thousand in Siberia and Canada to -15 parts per thousand in Zimbabwe. The results confirm the predicted dependence of the H-2 isotopic composition on the precipitation in the sampling region. The water content itself is found to at most slightly affect the results. Furthermore, delta D of H-2 depends strongly on combustion efficiency. Thus, the isotopic composition of H-2 from biomass burning shows a strong variability around the globe and between different stages of a fire. It is suggested that, rather than a global bulk number, global models that attempt to reproduce the spatial and temporal distribution of delta D in H-2 should incorporate explicitly the variability of delta D(H-2) from biomass burning on delta D in precipitation.