期刊
GEOPHYSICAL RESEARCH LETTERS
卷 46, 期 24, 页码 14912-14920出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2019GL085567
关键词
carbonyl sulfide; biomass burning; emission factor; emission ratio; forest fire; trace gases
资金
- UC Laboratory Fees Research Program In-Residence Graduate Fellowship [LGF-17-476795]
- U.S. Department of Energy, Office of Science, Advanced Scientific Computing Research and Biological and Environmental Research
- NASA ROSES AuraST program
- Department of Energy, Office of Science, Office of Terrestrial Ecosystem Sciences [DE-SC0011999]
- F.R.S.-FNRS
- Federation Wallonie-Bruxelles
- GAW-CH program of MeteoSwiss
- International Foundation High Altitude Research Stations Jungfraujoch and Gornergrat (HFSJG)
- DOE Office of Science User Facility
- Office of Science of the U.S. DOE [DE-AC02-05CH11231]
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- U.S. Department of Energy (DOE) [DE-SC0011999] Funding Source: U.S. Department of Energy (DOE)
Carbonyl sulfide (OCS) provides a proxy for measuring photosynthesis and is the primary background source of stratospheric aerosols. OCS emissions due to biomass burning are a variable and substantial (over 10%) part of the current OCS budget. OCS emission ratios from open burning fires, coupled with 1997-2016 data from the Global Fire Emissions Database (GFED4), yield OCS biomass burning emissions with a global average annual flux of 60 +/- 37 Gg(S) year(-1). A global box model suggests these emissions are more consistent with observations from global atmospheric composition monitoring networks than fluxes derived from previous synthesis papers. Even after considering the uncertainty in emission factor observations for each category of emissions and the interannual variation in total burned dry matter, the total OCS emissions from open burning are insufficient to account for the large imbalance between current estimates of global OCS sources and sinks.
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