Biomass Burning Unlikely to Account for Missing Source of Carbonyl Sulfide
Abstract
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.
Additional Information
© 2019 American Geophysical Union. All Rights Reserved. This article has been contributed to by US Government employees and their work is in the public domain in the USA. Issue Online: 27 January 2020. Version of Record online: 28 December 2019. Accepted manuscript online: 09 December 2019. Manuscript accepted: 04 December 2019. Manuscript revised: 28 November 2019. Manuscript received: 25 September 2019. Data sets for this work are available online at https://portal.nersc.gov/project/m2319/. J. R. Stinecipher was supported by a UC Laboratory Fees Research Program In‐Residence Graduate Fellowship (grant LGF‐17‐476795). P. J. Cameron‐Smith was supported through the Scientific Discovery through Advanced Computing (SciDAC) program funded by U.S. Department of Energy, Office of Science, Advanced Scientific Computing Research and Biological and Environmental Research. L. Kuai was supported by the NASA ROSES AuraST program. J. E. Campbell was supported by the US. Department of Energy, Office of Science, Office of Terrestrial Ecosystem Sciences (grant DE‐SC0011999). The multidecadal monitoring program of ULiege at the Jungfraujoch station has been primarily supported by the F.R.S.‐FNRS, BELSPO, the Fédération Wallonie‐Bruxelles (all in Brussels) and by the GAW‐CH program of MeteoSwiss. The International Foundation High Altitude Research Stations Jungfraujoch and Gornergrat (HFSJG, Bern) supported the facilities needed to perform the FTIR observations. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. DOE under contract DE‐AC02‐05CH11231. The work by Stinecipher and Cameron‐Smith was performed in part (J. S.), or in whole (P. C.), under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE‐AC52‐07NA27344. The authors thank Bob Yokelson for his helpful feedback about conditions affecting carbonyl sulfide emissions from peat and emission factors in general. The authors thank the organizers and participants of the 2017 Keck Institute for Space Studies workshop "Next‐Generation Approach for Detecting Climate‐Carbon Feedbacks: Space‐Based Integration of Carbonyl Sulfide (OCS), CO2, and Solar Induced Fluorescence (SIF)" for their helpful discussions. The authors thank two anonymous reviewers for their helpful comments and feedback. The authors declare no competing conflicts of interest.Attached Files
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Additional details
- Eprint ID
- 105713
- Resolver ID
- CaltechAUTHORS:20200930-190857730
- University of California
- LGF‐17‐476795
- Department of Energy (DOE)
- DE‐SC0011999
- Fonds de la Recherche Scientifique (FNRS)
- Belgian Federal Science Policy Office (BELSPO)
- Fédération Wallonie‐Bruxelles
- MeteoSwiss
- Department of Energy (DOE)
- DE‐AC02‐05CH11231
- Department of Energy (DOE)
- DE‐AC52‐07NA27344
- Created
-
2020-10-01Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Keck Institute for Space Studies