Detection of Active Microbial Enzymes in Nascent Sea Spray Aerosol: Implications for Atmospheric Chemistry and ClimateClick to copy article linkArticle link copied!
- Francesca Malfatti*Francesca Malfatti*E-mail: [email protected]Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesOGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Trieste 34100, ItalyMore by Francesca Malfatti
- Christopher LeeChristopher LeeDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United StatesMore by Christopher Lee
- Tinkara TintaTinkara TintaMarine Biology Station, National Institute of Biology, Piran 6330, SloveniaDepartment of Limnology and Bio-Oceanography, University of Vienna, A-1090 Vienna, AustriaMore by Tinkara Tinta
- Matthew A. PendergraftMatthew A. PendergraftScripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesMore by Matthew A. Pendergraft
- Mauro CelussiMauro CelussiOGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Trieste 34100, ItalyMore by Mauro Celussi
- Yanyan ZhouYanyan ZhouState Key Laboratory of Marine Environmental Science and Key Laboratory of the MOE for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiamen 361102, ChinaMore by Yanyan Zhou
- Camille M. SultanaCamille M. SultanaDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United StatesMore by Camille M. Sultana
- Ana RotterAna RotterMarine Biology Station, National Institute of Biology, Piran 6330, SloveniaMore by Ana Rotter
- Jessica L. AxsonJessica L. AxsonDepartment of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109, United StatesMore by Jessica L. Axson
- Douglas B. CollinsDouglas B. CollinsDepartment of Chemistry, University of Toronto, Toronto, ON M5S 3H6, CanadaMore by Douglas B. Collins
- Mitchell V. SantanderMitchell V. SantanderDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United StatesMore by Mitchell V. Santander
- Alma L. Anides MoralesAlma L. Anides MoralesDepartment of Chemistry, San Diego Miramar College, San Diego, California 92126, United StatesMore by Alma L. Anides Morales
- Lihini I. AluwihareLihini I. AluwihareScripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesMore by Lihini I. Aluwihare
- Nicole RiemerNicole RiemerDepartment of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United StatesMore by Nicole Riemer
- Vicki H. GrassianVicki H. GrassianScripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United StatesDepartment of Nanoengineering, University of California, San Diego, La Jolla, California 92037, United StatesMore by Vicki H. Grassian
- Farooq AzamFarooq AzamScripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesMore by Farooq Azam
- Kimberly A. Prather*Kimberly A. Prather*E-mail: [email protected]Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, United StatesDepartment of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United StatesMore by Kimberly A. Prather
Abstract

The oceans cover nearly three-quarters of the Earth’s surface and produce vast quantities of sea spray aerosols (SSA). Studies have shown that due to ocean biology SSA particles are comprised of much more than just sea salt and often include proteins, lipids, sugars, viruses, and bacteria. In this study, we show for the first time that a diverse array of microbial enzymes (protease, lipases, and alkaline phosphatase) are transferred from the ocean into the atmosphere and often become even more active with measured activities in SSA particles that are 1–2 orders of magnitude higher than those in bulk seawater. We hypothesize that these enzymatic reactions are enhanced in the interfacial environment of droplets and aerosols that can dynamically modify surface chemical species and properties. Simulations reveal that enzyme-containing SSA particles can rapidly coagulate with other preexisting aerosols, thus transferring the impact of enzyme reactions to a broad range of marine aerosols. These biotic reaction pathways are expected to profoundly change the composition of marine aerosols, particularly at the interface, and thus will impact cloud properties in marine environments. Future studies are needed to determine how photochemistry, changing ocean conditions in a warming climate, and other external factors will influence the activities of these enzymes and their impact on the composition of the marine atmosphere.
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