Possible Missing Sources of Atmospheric Glyoxal Part I: Phospholipid Oxidation from Marine Algae.

Autor:	Williams RT; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Caspers-Brown A; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Sultana CM; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Lee C; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Axson JL; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA.; School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA., Malfatti F; National Institute of Oceanography and Experimental Geophysics, 34100 Trieste, Italy.; Scripps Institution of Oceanography, University of California, La Jolla, San Diego, CA 92093, USA., Zhou Y; Scripps Institution of Oceanography, University of California, La Jolla, San Diego, CA 92093, USA.; State Key Laboratory of Marine Environmental Science, Key Laboratory of the MOE for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, China., Moore KA; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Stevens N; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Santander MV; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA., Azam F; School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA., Prather KA; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA.; Scripps Institution of Oceanography, University of California, La Jolla, San Diego, CA 92093, USA., Pomeroy RS; Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA 92093, USA.
Jazyk:	angličtina
Zdroj:	Metabolites [Metabolites] 2024 Nov 19; Vol. 14 (11). Date of Electronic Publication: 2024 Nov 19.
DOI:	10.3390/metabo14110639
Abstrakt:	Background: Glyoxal has been implicated as a significant contributor to the formation of secondary organic aerosols, which play a key role in our ability to estimate the impact of aerosols on climate. Elevated concentrations of glyoxal over remote ocean waters suggests that there is an additional source, distinct from urban and forest environments, which has yet to be identified. Herein, we demonstrate that the ocean can serve as an appreciable source of glyoxal in the atmosphere due to microbiological activity. Methods and Results: Based on mass spectrometric analyses of nascent sea spray aerosols and the sea surface microlayer (SSML) of naturally occurring algal blooms, we provide evidence that during the algae death phase phospholipids become enriched in the SSML and undergo autoxidation thereby generating glyoxal as a degradation product. Conclusions: We propose that the death phase of an algal bloom could serve as an important and currently missing source of glyoxal in the atmosphere.
Databáze:	MEDLINE
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