Investigating evidence of enhanced aerosol formation and growth due to autumnal moth larvae feeding on mountain birch at SMEAR I in northern Finland

Ilona Ylivinkka, Juhani Itämies, Tero Klemola, Kai Ruohomäki, Markku Kulmala, Ditte Taipale

Research output: Contribution to journalArticleScientificpeer-review

Abstract

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.

Original languageEnglish
JournalBoreal Environment Research
Volume25
Pages (from-to)121–143
Number of pages23
ISSN1239-6095
Publication statusPublished - 2020
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • ATMOSPHERIC NUCLEATION
  • BIOGENIC EMISSIONS
  • CLIMATE-CHANGE
  • EPIRRITA-AUTUMNATA
  • LEAF-AREA INDEX
  • OPEROPHTERA-BRUMATA
  • ORGANIC AEROSOL
  • OXIDATION-PRODUCTS
  • PARTICLE FORMATION EVENTS
  • VOLATILE ISOPRENOIDS

Cite this