Covering 71% of the Earth, the oceans represent a significant source of gases and aerosol particles to our atmosphere. Biological processes in the ocean produce chemical species which can profoundly alter the composition of the atmosphere. Once in the atmosphere, these species can become altered by sunlight and chemical reactions which change their ability to form clouds and impact climate. In the summer of 2019, the NSF Center for Aerosol Impacts on Chemistry of the Environment (CAICE) conducted the Sea Spray Chemistry And Particle Evolution project, or SeaSCAPE, a novel experiment which focused on unraveling complex ocean-atmosphere interactions. The focus of the project involves developing a better understanding of how human pollution interacts and reacts with ocean emissions of gases and aerosols – and ultimately affects cloud formation, air quality, and climate. In a 33 m long wave channel filled with 3,400 gallons of seawater, sea spray aerosols and volatile organic carbon gases (VOCs) were continuously measured over the lifecycle of a phytoplankton bloom. Oxidative flow reactors were utilized to simulate different amounts of atmospheric aging of both nascent sea spray aerosols (SSA) and VOCs. The resulting aged SSA and newly formed secondary marine aerosol (SMA) were investigated using a broad suite of complementary on-line and off-line measurements of aerosol number, size, and composition. In addition, other properties including morphology, hygroscopicity, IN activity, phase state, enzymatic activity, and pH were measured. To link changes in the chemistry of the airborne species with seawater biological processes, seawater measurements were made to track the progression of the microbial communities to account for and explain the turnover of organic and inorganic species. As a whole, the SeaSCAPE experiment focuses on capturing how much and how rapidly atmospheric reactions transform ocean-derived biogenic emissions in an effort to unravel the impact of humans on the ocean’s ability to control climate.

<b>Award Address </b>(Frank H. Field and Joe L. Franklin Award for Outstanding Achievement in Mass Spectrometry sponsored by Waters Corporation). Impact of ocean microbes on the composition of the marine atmosphere, clouds, and climate

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Award Address (Frank H. Field and Joe L. Franklin Award for Outstanding Achievement in Mass Spectrometry sponsored by Waters Corporation). Impact of ocean microbes on the composition of the marine atmosphere, clouds, and climate