Biomass Burning in Australia: No Evidence for Carbonyl Sulfide (OCS) Enhancement in Fire Plumes From In‐Situ Measurements During SouthTRAC
Abstract Determining the atmospheric abundance and the emission sources of carbonyl sulfide (OCS) plays a crucial role for the sulfur budget in the atmosphere. In addition to its main anthropogenic and biogenic sources, biomass burning is assumed to be an essential, but not well constrained source of OCS. From November 2019 onward extensive bushfires along the eastern coast of Australia released huge amounts of trace species into the atmosphere; during one flight of the SouthTRAC campaign air masses were observed carrying signatures of these fires along the southern coast of South America. An analysis of the composition of air masses inside and outside the plume revealed distinct differences in the trace species abundances. Specifically, our results indicate that OCS shows no enhancement in its atmospheric mixing ratio due to the Australian fires and thus highlights the varying emission strength of OCS for different types of biomass burning.
Authors
- Philipp Joppe (ORCID: https://orcid.org/0009-0009-0166-1146)
- Peter Michael Hoor (ORCID: https://orcid.org/0000-0001-6582-6864)
- Heiko Bozem (ORCID: https://orcid.org/0000-0003-2412-9864)
- Hans‐Christoph Lachnitt (ORCID: https://orcid.org/0009-0005-4702-3896)
- Andreas Zahn (ORCID: https://orcid.org/0000-0003-3153-3451)
- Daniel Kunkel (ORCID: https://orcid.org/0000-0002-9652-0099)
- Helmut Ziereis (ORCID: https://orcid.org/0000-0001-5483-5669)
- Jens‐Uwe Grooß (ORCID: https://orcid.org/0000-0002-9485-866X)
- Martin Riese (ORCID: https://orcid.org/0000-0001-6398-6493)
- Nicolas Emig (ORCID: https://orcid.org/0009-0006-5609-591X)
- V. Bense (ORCID: https://orcid.org/0009-0001-3379-8659)
- S. Kessler (ORCID: https://orcid.org/0009-0007-6571-146X)
- T. Kaluza
Institutions
- Karlsruhe Institute of Technology (DE)
- University of Wuppertal (DE)
- Forschungszentrum Jülich (DE)
- Johannes Gutenberg University Mainz (DE)
- Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) (DE)
- Max Planck Institute for Chemistry (DE)
- University of Reading (GB)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2026-10-16
- DOI
- https://doi.org/10.1029/2025gl118750
- Primary Topic
- Atmospheric chemistry and aerosols
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Deutsche Forschungsgemeinschaft