Rapid cloud removal of dimethyl sulfide oxidation products limits SO ₂ and cloud condensation nuclei production in the marine atmosphere Article Swipe

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Dimethyl sulfide Cloud condensation nuclei Aerosol Atmosphere (unit) Sulfate Sulfate aerosol Sulfur cycle Earth's energy budget Atmospheric sciences Environmental science Sulfur Flux (metallurgy) Radiative forcing Sulfur dioxide Sea spray Chemistry Meteorology Radiation Geology Quantum mechanics Physics Inorganic chemistry Organic chemistry

Gordon A. Novak , Charles H. Fite , Christopher D. Holmes , Patrick R. Veres , J. A. Neuman , I. C. Faloona , Joel A. Thornton , Glenn M. Wolfe , Michael P. Vermeuel , Christopher M. Jernigan , Jeff Peischl , Thomas B. Ryerson , Chelsea R. Thompson , Ilann Bourgeois , C. Warneke , Georgios I. Gkatzelis , Matthew M. Coggon , Kanako Sekimoto , T. P. Bui , Jonathan M. Dean‐Day , Glenn S. Diskin , Joshua P. DiGangi , J. B. Nowak , Richard H. Moore , Elizabeth B. Wiggins , Edward L. Winstead , Claire Robinson , K. L. Thornhill , Kevin J. Sanchez , Samuel R. Hall , Kirk Ullmann , Maximilian Dollner , Bernadett Weinzierl , D. R. Blake , Timothy H. Bertram ·

YOU? · · 2021 · Open Access · · DOI: https://doi.org/10.1073/pnas.2110472118 · OA: W3206212349

Significance Ocean emissions of dimethyl sulfide (DMS) are a major precursor for the production and growth of aerosol particles, which can act as seeds for the formation of cloud droplets in the marine atmosphere with the subsequent impacts on Earth’s climate. Global aircraft observations indicate that DMS is efficiently oxidized to hydroperoxymethyl thioformate (HPMTF), a previously unrecognized molecule, which necessitates revisiting DMS oxidation chemistry in the marine atmosphere. We show through ambient observations and global modeling that a dominant loss pathway for HPMTF is uptake into cloud droplets. This loss process short circuits gas-phase oxidation and significantly alters the dynamics of aerosol production and growth in the marine atmosphere.