Articles | Volume 17, issue 3
https://doi.org/10.5194/acp-17-2459-2017
https://doi.org/10.5194/acp-17-2459-2017
Research article
 | 
16 Feb 2017
Research article |  | 16 Feb 2017

Influence of rain on the abundance of bioaerosols in fine and coarse particles

Chathurika M. Rathnayake, Nervana Metwali, Thilina Jayarathne, Josh Kettler, Yuefan Huang, Peter S. Thorne, Patrick T. O'Shaughnessy, and Elizabeth A. Stone

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Short summary
Exposures to bioaerosols depend on their type, particle size, and concentration. While typically found in coarse particles (2.5–10 microns), pollens, fungal spores, and bacterial endotoxins decrease to less than 2.5 microns and simultaneously increase in concentration during rain events. These observations contrast the assumption that rain washes bioaerosols from the air and reduces allergen levels. Instead, population exposures to bioaerosols are expected to be enhanced during rain events.
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