The oxygen to carbon dioxide ratios observed in emissions from a wildfire in northern California
Abstract
At Trinidad, California we observed elevated CO2concentrations and concomitant lowered O2levels coincident with forest fires 70 km distant (from 10/8/99 to 10/21/99). The precision of our O2data, ±1 µmol O2/mol dry air, revealed the reduction of atmospheric oxygen resulting from the combustion of biomass, and the stoichiometric ratios (−O2/CO2) of the wildfire emissions. Estimates of daily −O2/CO2ratios were obtained by regression of CO2against corresponding O2data (R² 0.86 to 0.96). Daily −O2/CO2ratios changed from 1.15 to 1.41 on a particularly smoky day that coincided with elevated levels of CH4and increased CH4/CO2ratios. The change to a higher ratio during smoky conditions illustrates the association between changing emissions and −O2/CO2ratios, possibly due to changing wildfire dynamics.
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Methane emission ratios reported for smoldering fires characterized by direct O2/CO measurements for the California 1999 Big Bar Complex fire are consistent with the authors' measurements.
“Methane emission ratios reported for smoldering fires that were characterized by direct O 2 /CO measurements for the California 1999 Big Bar Complex fire are also consistent with our measurements (Lueker et al., 2001).”
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Frausto-Vicencio, I., Heerah, S., Meyer, A. G., Parker, H. A., Dubey, M., & Hopkins, F. M. (2023) · Atmospheric Chemistry and Physics · doi:10.5194/acp-23-4521-2023 · Cited by 10 · see citing works
Self-citation
- Authors
- Lueker, T. J., Keeling, R. F., & Dubey, M. K.
- Affiliations
- Scripps Institution of Oceanography (US)
- Los Alamos National Laboratory (US)
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2001-06-15
- Volume
- 28
- Issue
- 12
- Pages
- 2413-2416
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2031888099
- Cited by
- 26
- References
- 0
- Citations by year
- 2026: 1 · 2023: 3 · 2022: 4 · 2021: 7 · 2013: 1 · 2012: 2
- FWCI
- 0.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geophysical Research Letters (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
- Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
- Keywords
- wildfire emissions, carbon dioxide, biomass combustion, methane, CO2/CH4 ratio, smoke, forest fires, wildfire dynamics
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