Advancing model systems for fundamental laboratory studies of sea spray aerosol using the microbial loop

TitleAdvancing model systems for fundamental laboratory studies of sea spray aerosol using the microbial loop
Publication TypeJournal Article
Year of Publication2015
AuthorsLee C., Sultana C.M, Collins DB, Santander M.V, Axson J.L, Malfatti F., Cornwell G.C, Grandquist J.R, Deane GB, Stokes MD, Azam F, Grassian VH, Prather KA
JournalJournal of Physical Chemistry A
Date Published2015/08
Type of ArticleArticle
ISBN Number1089-5639
Accession NumberWOS:000360026500011
Keywordsbiogenic ice nuclei; chemistry; diatom bloom; dissolved organic-carbon; growth-rates; heterogeneous; marine aerosol; nitric-acid; phytoplankton bloom; stratospheric temperatures; surface microlayers

Sea spray aerosol (SSA) particles represent one of the most abundant surfaces available for heterogeneous reactions to occur upon and thus profoundly alter the composition of the troposphere. In an effort to better understand tropospheric heterogeneous reaction processes, fundamental laboratory studies must be able to accurately reproduce the chemical complexity of SSA. Here we describe a new approach that uses microbial processes to control the composition of seawater and SSA particle composition. By inducing a phytoplankton bloom, we are able to create dynamic ecosystem interactions between marine microorganisms, which serve to alter the organic mixtures present in seawater. Using this controlled approach, changes in seawater composition become reflected in the chemical composition of SSA particles 4 to 10 d after the peak in chlorophyll-a. This approach for producing and varying the chemical complexity of a dominant tropospheric aerosol provides the foundation for further investigations of the physical and chemical properties of realistic SSA particles under controlled conditions.

Short TitleJ. Phys. Chem. A
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