Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source

Details Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3618807y&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 18, CiteID L18807

Physics

Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Biogeosciences: Isotopic Composition And Chemistry (1041, 4870), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Biogeosciences: Carbon Cycling (4806), Biogeosciences: Trace Gases

Scientific paper

We present carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning sources using laboratory experiments. The respective δ 13C 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 δ 13C of methanol depends on the δ 13C of the fuel biomass and burning conditions, but the variation in δ 13C of acetaldehyde depends on the δ 13C 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.

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