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Publication abstract: Biological aerosols, typically identified through their fluorescence properties, strongly influence clouds and climate. Sea spray aerosols (SSA) are a major source of biological aerosols, but detection in the atmosphere is challenging due to potential interference from other sources. Here, the fluorescence signature of isolated SSA, produced using laboratory-based aerosol generation methods, was analyzed and compared with two commonly used fluorescence techniques: excitation-emission matrix spectroscopy (EEMS) and the Wideband Integrated Bioaerosol Sensor (WIBS). A range of dynamic biological ocean scenarios were tested to compare EEMS and WIBS analyses of SSA. Both techniques revealed similar trends in SSA fluorescence intensity in response to changes in ocean microbiology, demonstrating the potential to use the WIBS to measure fluorescent aerosols alongside EEMS bulk solution measurements. Together, these instruments revealed a unique fluorescence signature of isolated, nascent SSA and, for the first time, a size segregated emission of fluorescent species in SSA. Additionally, the fluorescence signature of aerosolized marine bacterial isolates was characterized and showed similar fluorescence peaks to those of SSA, suggesting that bacteria are a contributor to SSA fluorescence. Through investigation of isolated SSA, this study provides a reference for future identification of marine biological aerosols in a complex atmosphere. NSF Center for Aerosol Impacts on Chemistry of the Environment (CAICE), a Center for Chemical Innovation (CHE-1801971) Research Data Curation Program, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/rdcp) Santander, Mitchell V.; Mitts, Brock A.; Pendergraft, Matthew A.; Dinasquet, Julie; Lee, Christopher; Moore, Alexia N.; Cancelada, Lucia B.; Kimble, Ke'La A.; Malfatti, Francesca; Prather, Kimberly A. (2021). Data from: Tandem fluorescence measurements of organic matter and bacteria released in sea spray aerosols. In Center for Aerosol Impacts on Chemistry of the Environment (CAICE). UC San Diego Library Digital Collections. https://doi.org/10.6075/J0XK8D31 References: Timothy L. Guasco, Luis A. Cuadra-Rodriguez, Byron E. Pedler, Andrew P. Ault, Douglas B. Collins, Defeng Zhao, Michelle J. Kim, Matthew J. Ruppel, Scott C. Wilson, Robert S. Pomeroy, Vicki H. Grassian, Farooq Azam, Timothy H. Bertram, and Kimberly A. Prather. Transition Metal Associations with Primary Biological Particles in Sea Spray Aerosol Generated in a Wave Channel. Environmental Science & Technology 2014 48 (2), 1324-1333. https://doi.org/10.1021/es403203d
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