Emissions of Glyoxal and Other Carbonyl Compounds from Agricultural Biomass Burning Plumes Sampled by Aircraft

Citations Over TimeTop 10% of 2017 papers

Abstract

We report enhancements of glyoxal and methylglyoxal relative to carbon monoxide and formaldehyde in agricultural biomass burning plumes intercepted by the NOAA WP-3D aircraft during the 2013 Southeast Nexus and 2015 Shale Oil and Natural Gas Nexus campaigns. Glyoxal and methylglyoxal were measured using broadband cavity enhanced spectroscopy, which for glyoxal provides a highly selective and sensitive measurement. While enhancement ratios of other species such as methane and formaldehyde were consistent with previous measurements, glyoxal enhancements relative to carbon monoxide averaged 0.0016 ± 0.0009, a factor of 4 lower than values used in global models. Glyoxal enhancements relative to formaldehyde were 30 times lower than previously reported, averaging 0.038 ± 0.02. Several glyoxal loss processes such as photolysis, reactions with hydroxyl radicals, and aerosol uptake were found to be insufficient to explain the lower measured values of glyoxal relative to other biomass burning trace gases, indicating that glyoxal emissions from agricultural biomass burning may be significantly overestimated. Methylglyoxal enhancements were three to six times higher than reported in other recent studies, but spectral interferences from other substituted dicarbyonyls introduce an estimated correction factor of 2 and at least a 25% uncertainty, such that accurate measurements of the enhancements are difficult.

Related Papers

• → Mechanism of Carbon Skeleton Formation of 2,3,5-Trimethylpyrazine via a Conversion Reaction between Methylglyoxal and Glyoxal(2023)16 cited
• → Investigation of formation of well-known AGEs precursors in cookies using an in vitro simulated gastrointestinal digestive system(2021)16 cited
• → Primary emissions of glyoxal and methylglyoxal from laboratorymeasurements of open biomass burning(2018)7 cited
• → A preliminary theoretical study of the acid catalyzed hydration of glyoxal, methylglyoxal, and other simple aldehydes(2009)1 cited
• → Glyoxal Derivatives as Ozonation Products: The Biodegradation, DNA Lesion in Rat Hepatocytes and the Occurrence in Water Purification Process.(1995)2 cited