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Carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning source
Author(s) -
Yamada Keita,
Hattori Ryota,
Ito Yuji,
Shibata Hiroki,
Yoshida Naohiro
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl038962
Subject(s) - acetaldehyde , methanol , biomass (ecology) , biomass burning , environmental chemistry , carbon fibers , environmental science , isotopic signature , isotopes of carbon , atmospheric sciences , chemistry , stable isotope ratio , materials science , total organic carbon , geology , aerosol , ethanol , organic chemistry , oceanography , physics , quantum mechanics , composite number , composite material
We present carbon isotopic signatures of methanol and acetaldehyde emitted from biomass burning sources using laboratory experiments. The respective δ 13 C of methanol and acetaldehyde emitted from burning experiments of five plant materials (three C 3 and two C 4 plants) were −20–−46‰ and −11–−25‰. The variation in δ 13 C of methanol depends on the δ 13 C of the fuel biomass and burning conditions, but the variation in δ 13 C of acetaldehyde depends on the δ 13 C 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.