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- Title
Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest: seasonal patterns, abundances and size distributions.
- Authors
Aku Helin; Sietiö, Outi-Maaria; Heinonsalo, Jussi; Bäck, Jaana; Riekkola, Marja-Liisa; Parshintsev, Jevgeni
- Abstract
Bioaerosols are ubiquitous in the atmosphere and constitute ∼ 30 % of atmospheric aerosol particle mass in sizes > 1 μm. Bioaerosol components, such as bacteria, fungi and pollen, may affect the climate by acting as could-active particles, thus having an effect on cloud and precipitation formation processes. In this study, size-segregated aerosol samples (< 1.0, 1-2.5, 2.5-10 and > 10 μm) were collected in boreal forest (Hyytiälä, Finland) during one year and analyzed for free amino acids (FAAs), DNA concentration and microorganism (bacteria, Pseudomonas and fungi). Measurements were performed using tandem mass spectrometry, spectrophotometry and qPCR, respectively. Meteorological parameters and statistical analysis were used to study their atmospheric implication for results. Distinct annual patterns of bioaerosol components were observed, late spring and autumn being seasons of dominant occurrence. Elevated abundances of FAAs and bacteria were observed during the local pollen season, whereas fungi were observed at highest level during autumn. Meteorological parameters, such as air and soil temperature, radiation and rainfall were observed to possess close relationship with bioaerosol abundances on an annual scale.
- Subjects
MICROBIOLOGICAL aerosols; TAIGAS; PARTICLE size distribution; TANDEM mass spectrometry; SPECTROPHOTOMETRY
- Publication
Atmospheric Chemistry & Physics Discussions, 2017, p1
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acp-2017-620