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Factors influencing the contribution of ion-induced nucleation in a boreal forest, Finland
ion-induced nucleation a boreal forest Finland
2010/8/12
We present the longest series of measurements so far (2 years and 7 months) made with an Ion-DMPS at the SMEAR II measurement station in Hyytiälä, Southern Finland. We show that the classifi...
Airborne measurements of nucleation mode particles II: boreal forest nucleation events
Airborne measurements nucleation mode particles boreal forest nucleation events
2009/3/13
Airborne measurements of nucleation mode aerosol concentrations during nucleation events over the boreal forest of southern Finland are reported. Three case studies are analyzed in an attempt to chara...
Kinetic nucleation and ions in boreal forest particle formation events
Kinetic nucleation ions boreal forest particle
2009/3/10
In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic mo...
Tethered balloon measurements of biogenic volatile organic compounds at a Boreal forest site
Tethered balloon biogenic volatile organic compounds Boreal forest site
2009/2/20
Measurements of biogenic volatile organic compounds (VOCs) were performed at Hyytiälä, a Boreal forest site in Southern Finland as part of the OSOA (origin and formation of secondary organic...
Observation of 2-methyltetrols and related photo-oxidation products of isoprene in boreal forest aerosols from Hyytiälä, Finland
2-methyltetrols photo-oxidation products isoprene boreal forest aerosols Finland
2009/2/18
Oxidation products of isoprene including 2-methyltetrols (2-methylthreitol and 2-methylerythritol), 2-methylglyceric acid and triol derivatives of isoprene (2-methyl-1,3,4-trihydroxy-1-butene (cis and...
Deployment of a ground-based CIMS apparatus for the detection of organic gases in the boreal forest during the QUEST campaign
ground-based CIMS apparatus organic gases boreal forest QUEST campaign
2009/2/6
Measurements of atmospheric volatile organic compounds were performed in the Finnish Boreal forest atmosphere during spring 2003, as part of the project QUEST (Quantification of Aerosol Nucleation in ...
Hygroscopic properties of ultrafine aerosol particles in the boreal forest: diurnal variation, solubility and the influence of sulfuric acid
ultrafine aerosol particles boreal forest sulfuric acid
2008/11/27
The hygroscopic growth of aerosol particles present in a boreal forest was measured at a relative humidity of 88%. Simultaneously the gas phase concentration of sulfuric acid, a very hygroscopic compo...
Variation and balance of positive air ion concentrations in a boreal forest
Variation balance positive air ion concentrations boreal forest
2008/10/29
Air ions are characterized on the basis of measurements carried out in a boreal forest at the Hyytiälä SMEAR station, Finland, during the BIOFOR III campaign in spring 1999. The air ions wer...