| Literature DB >> 32071211 |
Patrick R Veres1, J Andrew Neuman2,3, Timothy H Bertram4, Emmanuel Assaf2,3, Glenn M Wolfe5,6, Christina J Williamson2,3, Bernadett Weinzierl7, Simone Tilmes8, Chelsea R Thompson2,3, Alexander B Thames9, Jason C Schroder3,10, Alfonso Saiz-Lopez11, Andrew W Rollins2, James M Roberts2, Derek Price3,10, Jeff Peischl2,3, Benjamin A Nault3,10, Kristian H Møller12, David O Miller9, Simone Meinardi13, Qinyi Li11, Jean-François Lamarque14, Agnieszka Kupc2,3,7, Henrik G Kjaergaard12, Douglas Kinnison8, Jose L Jimenez3,10, Christopher M Jernigan4, Rebecca S Hornbrook8, Alan Hills8, Maximilian Dollner7, Douglas A Day3,10, Carlos A Cuevas11, Pedro Campuzano-Jost3,10, James Burkholder2, T Paul Bui15, William H Brune9, Steven S Brown2, Charles A Brock2, Ilann Bourgeois2,3, Donald R Blake13, Eric C Apel8, Thomas B Ryerson2.
Abstract
Dimethyl sulfide (DMS), emitted from the oceans, is the most abundant biological source of sulfur to the marine atmosphere. Atmospheric DMS is oxidized to condensable products that form secondary aerosols that affect Earth's radiative balance by scattering solar radiation and serving as cloud condensation nuclei. We report the atmospheric discovery of a previously unquantified DMS oxidation product, hydroperoxymethyl thioformate (HPMTF, HOOCH2SCHO), identified through global-scale airborne observations that demonstrate it to be a major reservoir of marine sulfur. Observationally constrained model results show that more than 30% of oceanic DMS emitted to the atmosphere forms HPMTF. Coincident particle measurements suggest a strong link between HPMTF concentration and new particle formation and growth. Analyses of these observations show that HPMTF chemistry must be included in atmospheric models to improve representation of key linkages between the biogeochemistry of the ocean, marine aerosol formation and growth, and their combined effects on climate.Entities:
Keywords: aerosol sulfate; autoxidation; dimethyl sulfide; marine aerosols; marine sulfur
Year: 2020 PMID： 32071211 PMCID： PMC7060725 DOI： 10.1073/pnas.1919344117
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205