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- W2894431566 endingPage "e5663" @default.
- W2894431566 startingPage "e5663" @default.
- W2894431566 abstract "Natural aquatic environments such as oceans, lakes, and rivers are home to a tremendous diversity of microorganisms. Some may cross the air-water interface within droplets and become airborne, with the potential to impact the Earth’s radiation budget, precipitation processes, and spread of disease. Larger droplets are likely to return to the water or adjacent land, but smaller droplets may be suspended in the atmosphere for transport over long distances. Here, we report on a series of controlled laboratory experiments to quantify wind-driven droplet production from a freshwater source for low wind speeds. The rate of droplet production increased quadratically with wind speed above a critical value (10-m equivalent 5.7 m/s) where droplet production initiated. Droplet diameter and ejection speeds were fit by a gamma distribution. The droplet mass flux and momentum flux increased with wind speed. Two mechanisms of droplet production, bubble bursting and fragmentation, yielded different distributions for diameter, speed, and angle. At a wind speed of about 3.5 m/s, aqueous suspensions of the ice-nucleating bacterium Pseudomonas syringae were collected at rates of 283 cells m −2 s −1 at 5 cm above the water surface, and at 14 cells m −2 s −1 at 10 cm above the water surface. At a wind speed of about 4.0 m/s, aqueous suspensions of P. syringae were collected at rates of 509 cells m −2 s −1 at 5 cm above the water surface, and at 81 cells m −2 s −1 at 10 cm above the water surface. The potential for microbial flux into the atmosphere from aquatic environments was calculated using known concentrations of bacteria in natural freshwater systems. Up to 3.1 × 10 4 cells m −2 s −1 of water surface were estimated to leave the water in potentially suspended droplets (diameters <100 µm). Understanding the sources and mechanisms for bacteria to aerosolize from freshwater aquatic sources may aid in designing management strategies for pathogenic bacteria, and could shed light on how bacteria are involved in mesoscale atmospheric processes." @default.
- W2894431566 created "2018-10-05" @default.
- W2894431566 creator A5016838925 @default.
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- W2894431566 creator A5037077356 @default.
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- W2894431566 creator A5085488093 @default.
- W2894431566 date "2018-09-26" @default.
- W2894431566 modified "2023-10-18" @default.
- W2894431566 title "Wind-driven spume droplet production and the transport of<i>Pseudomonas syringae</i>from aquatic environments" @default.
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- W2894431566 doi "https://doi.org/10.7717/peerj.5663" @default.
- W2894431566 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6163035" @default.
- W2894431566 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30280035" @default.
- W2894431566 hasPublicationYear "2018" @default.
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