Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source
Article first published online: 22 SEP 2009
Copyright 2009 by the American Geophysical Union.
Geophysical Research Letters
Volume 36, Issue 18, September 2009
How to Cite
2009), Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source, Geophys. Res. Lett., 36, L18807, doi:10.1029/2009GL038962., , , , and (
- Issue published online: 22 SEP 2009
- Article first published online: 22 SEP 2009
- Manuscript Accepted: 19 AUG 2009
- Manuscript Revised: 16 AUG 2009
- Manuscript Received: 30 APR 2009
- oxygenated volatile organic compounds;
- atmospheric methanol and acetaldehyde;
- biomass burning
 We present carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning sources using laboratory experiments. The respective δ13C of methanol and acetaldehyde emitted from burning experiments of five plant materials (three C3 and two C4 plants) were −20–−46‰ and −11–−25‰. The variation in δ13C of methanol depends on the δ13C of the fuel biomass and burning conditions, but the variation in δ13C of acetaldehyde depends on the δ13C of fuel biomass and is independent of burning conditions. Combining these observations with previously reported global distributions of fire types, burning conditions, amounts of biomass burned, vegetation types, and emission factors, we estimated the global isotopic signature for biomass burning source as −33 ± 16‰ for methanol.