气候变化领域集成服务门户(CCPortal): Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest

CCPortal

DOI	10.5194/acp-21-695-2021
	Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest
	Sulo J.; Sarnela N.; Kontkanen J.; Ahonen L.; Paasonen P.; Laurila T.; Jokinen T.; Kangasluoma J.; Junninen H.; Sipilä M.; Petäjä T.; Kulmala M.; Lehtipalo K.
发表日期	2021
ISSN	1680-7316
起始页码	695
结束页码	715
卷号	21 期号:2
英文摘要	p The knowledge of the dynamics of sub-3 span classCombining double low line inline-formula nm particles in the atmosphere is crucial for our understanding of the first steps of atmospheric new particle formation. Therefore, accurate and stable long-term measurements of the smallest atmospheric particles are needed. In this study, we analyzed over 5 years of particle concentrations in size classes 1.1-1.7 and 1.7-2.5 span classCombining double low line inline-formula nm obtained with the particle size magnifier (PSM) and 3 years of precursor vapor concentrations measured with the chemical ionization atmospheric pressure interface time-of-flight mass spectrometer (CI-APi-ToF) at the SMEAR II station in Hyytiälä, Finland. The results show that there are significant seasonal differences in median concentrations of sub-3 span classCombining double low line inline-formula nm particles, but the two size classes behave partly differently. The 1.1-1.7 span classCombining double low line inline-formula nm particle concentrations are highest in summer, while the 1.7-2.5 span classCombining double low line inline-formula nm particle concentrations are highest in springtime. The 1.7-2.5 span classCombining double low line inline-formula nm particles exhibit a daytime maximum in all seasons, while the 1.1-1.7 span classCombining double low line inline-formula nm particles have an additional evening maximum during spring and summer. Aerosol precursor vapors have notable diurnal and seasonal differences as well. Sulfuric acid and highly oxygenated organic molecule (HOM) monomer concentrations have clear daytime maxima, while HOM dimers have their maxima during the night. HOM concentrations for both monomers and dimers are the highest during summer and the lowest during winter following the biogenic activity in the surrounding forest. Sulfuric acid concentrations are the highest during spring and summer, with autumn and winter concentrations being 2 to 3 times lower. A correlation analysis between the sub-3 span classCombining double low line inline-formula nm concentrations and aerosol precursor vapor concentrations indicates that both HOMs (particularly their dimers) and sulfuric acid play a significant role in new particle formation in the boreal forest. Our analysis also suggests that there might be seasonal differences in new particle formation pathways that need to be investigated further. © 2021 Royal Society of Chemistry. All rights reserved.
英文关键词	aerosol; boreal forest; concentration (composition); diurnal variation; measurement method; particle size; seasonal variation; sulfuric acid; Finland; Hyytiala; Pirkanmaa
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168824
作者单位	Institute for Atmospheric and Earth System Research/Physics, University of Helsinki, Helsinki, 00014, Finland; Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China; Finnish Meteorological Institute, Helsinki, 00560, Finland; Laboratory of Environmental Physics, University of Tartu, Tartu, Estonia
推荐引用方式 GB/T 7714	Sulo J.,Sarnela N.,Kontkanen J.,et al. Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest[J],2021,21(2).
APA	Sulo J..,Sarnela N..,Kontkanen J..,Ahonen L..,Paasonen P..,...&Lehtipalo K..(2021).Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest.Atmospheric Chemistry and Physics,21(2).
MLA	Sulo J.,et al."Long-term measurement of sub-3 nm particles and their precursor gases in the boreal forest".Atmospheric Chemistry and Physics 21.2(2021).