Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest : seasonal patterns, abundances and size distributions

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Helin , A , Sietiö , O-M , Heinonsalo , J , Bäck , J , Riekkola , M-L & Parshintsev , J 2017 , ' Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest : seasonal patterns, abundances and size distributions ' , Atmospheric Chemistry and Physics , vol. 17 , no. 21 , pp. 13089-13101 . https://doi.org/10.5194/acp-17-13089-2017 , https://doi.org/10.5194/acp-17-13089-2017

Title: Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest : seasonal patterns, abundances and size distributions
Author: Helin, Aku; Sietiö, Outi-Maaria; Heinonsalo, Jussi; Bäck, Jaana; Riekkola, Marja-Liisa; Parshintsev, Jevgeni
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Food and Nutrition
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Date: 2017-11-06
Language: eng
Number of pages: 13
Belongs to series: Atmospheric Chemistry and Physics
ISSN: 1680-7316
URI: http://hdl.handle.net/10138/229640
Abstract: Primary biological aerosol particles (PBAPs) are ubiquitous in the atmosphere and constitute similar to 30% of atmospheric aerosol particle mass in sizes > 1 mu m. PBAP components, such as bacteria, fungi and pollen, may affect the climate by acting as cloud-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 mu m) were collected in boreal forest (Hyytiala, Finland) during a 9-month period covering all seasons and analysed 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 PBAP 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 the highest level during autumn. Meteorological parameters such as air and soil temperature, radiation and rainfall were observed to possess a close relationship with PBAP abundances on an annual scale.
Subject: ICE NUCLEATION ACTIVITY
FINE PARTICLES PM2.5
RESPIRATORY DEPOSITION
PSEUDOMONAS-SYRINGAE
DIFFERENT ECOSYSTEMS
NORTHERN CALIFORNIA
PARTICULATE MATTER
GLOBAL ATMOSPHERE
ORGANIC NITROGEN
FOG WATERS
1172 Environmental sciences
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