Tandem Fluorescence Measurements of Organic Matter and Bacteria Released in Sea Spray Aerosols
| Autor: | Brock A. Mitts, Kimberly A. Prather, Lucia B. Cancelada, Julie Dinasquet, Ke’La A. Kimble, Alexia N. Moore, Francesca Malfatti, Matthew A. Pendergraft, Mitchell V. Santander, Christopher T. Lee |
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| Přispěvatelé: | Santander, M. V., Mitts, B. A., Pendergraft, M. A., Dinasquet, J., Lee, C., Moore, A. N., Cancelada, L. B., Kimble, K. A., Malfatti, F., Prather, K. A. |
| Rok vydání: | 2021 |
| Předmět: |
aerosol
010501 environmental sciences complex mixtures 01 natural sciences marine microbe Environmental Chemistry Seawater Organic matter 0105 earth and related environmental sciences Aerosols chemistry.chemical_classification marine microbes Bacteria biology Tandem Atmosphere Spectrum Analysis General Chemistry respiratory system Sea spray biology.organism_classification ocean Fluorescence Aerosol stomatognathic diseases chemistry Environmental chemistry Environmental science fluorescence sense organs |
| Zdroj: | Environmental Science & Technology. 55:5171-5179 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.0c05493 |
| Popis: | Biological aerosols, typically identified through their fluorescence properties, strongly influence clouds and climate. Sea spray aerosol (SSA) particles 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. |
| Databáze: | OpenAIRE |
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