In:
Lithuanian Journal of Physics, Lithuanian Academy of Sciences, Vol. 59, No. 3 ( 2019-10-28)
Abstract:
Volatile organic compounds (VOCs) emitted by trees in response to abiotic stress evoke high levels of secondary organic aerosol (SOA) compounds. Few techniques exist to provide chemically-resolved submicron (PM 1 ) particle mass concentrations and source apportionment of stress-induced emissions from trees and SOA formation. The chemical composition of atmospheric aerosol particles was characterized using an aerosol chemical speciation monitor (ACSM) at a mixed-mature forest site – the Aukštaitija Integrated Monitoring Station in the eastern part of Lithuania. The organic fraction of PM 1 consisted of SOA (76%) and of anthropogenic combustion related primary organic aerosol (POA) (24%). The analysis of tree trunk circumference revealed three shrinkage and three normal increase episodes. During the episodes of tree trunk circumference shrinkage, several m / z signal ( m / z 42, 43, 45, 48, 50) intensities were found to be magnified together with the daily SOA concentration. The stress response analysis confirm that tree trunk circumference shrinkage may be observed through the enhancement of selected m / z signals and result in increased SOA levels.
Type of Medium:
Online Resource
ISSN:
2424-3647
,
1648-8504
DOI:
10.3952/physics.v59i3.4083
Language:
Unknown
Publisher:
Lithuanian Academy of Sciences
Publication Date:
2019