A1 Refereed original research article in a scientific journal
Investigating evidence of enhanced aerosol formation and growth due to autumnal moth larvae feeding on mountain birch at SMEAR I in northern Finland
Authors: Ylivinkka I, Itämies J, Klemola T, Ruohomäki K, Kulmala M, Taipale D
Publisher: FINNISH ENVIRONMENT INST
Publication year: 2020
Journal: Boreal Environment Research
Journal name in source: BOREAL ENVIRONMENT RESEARCH
Journal acronym: BOREAL ENVIRON RES
Volume: 25
First page : 121
Last page: 143
Number of pages: 23
ISSN: 1239-6095
eISSN: 1797-2469
Web address : http://www.borenv.net/BER/archive/pdfs/ber25/ber25-121-143.pdf
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/50722060
Laboratory studies have shown that heibivory-induced biogenic volatile organic compound (BVOC) emissions might enhance aerosol formation and growth. To increase understanding of the atmospheric relevance of this enhancement, we analyzed 25 years of data from SMEAR I (Station for Measuring Ecosystem-Atmosphere Relations) in northern Finland, where autumnal moth (Epirrita autumnata) larvae are prominent defoliators of mountain birch. We did not find a direct correlation between the autumnal moth density and aerosol processes, nor between the total number concentration and temperature, and hence the basal BVOC emissions. Instead, there is some evidence that the total particle concentration is elevated even for a few years after the infestation due to delayed defense response of mountain birch. The low total biomass of the trees concomitantly with low autumnal moth densities during most of the years of our study, may have impacted our results, hindering the enhancement of aerosol processes.
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