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Response of Cloud Condensation Nuclei (> 50 nm) to changes in ion-nucleation
Response Cloud Condensation Nuclei changes ion-nucleation
2012/2/28
In experiments where ultraviolet light produces aerosols from trace amounts of ozone, sulphur dioxide, and water vapour, the number of additional small particles produced by ionization by gamma source...
EUCAARI ion spectrometer measurements at 12 European sites – analysis of new particle formation events
EUCAARI ion spectrometer measurements 12 European sites new particle formation events
2010/9/1
We present comprehensive results on continuous atmospheric cluster and particle measurements in the size range ~1–42 nm within the European Integrated project on Aerosol Cloud Climate and Air Quality ...
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...
Technical Note: Measuring condensation sink and ion sink of atmospheric aerosols with the electrical low pressure impactor (ELPI)
condensation sink ion sink atmospheric aerosols ELPI
2010/2/21
We investigate the suitability of ELPI for condensation sink and ion sink measurements. The aim is to find the simple calibration factors by which the measured ELPI current can be converted to condens...
Corrigendum to “The role of ammonia in sulfuric acid ion induced nucleation”published in Atmos. Chem. Phys., 8, 2859–2867, 2008
ammonia sulfuric acid ion nucleation
2009/10/9
We have found some numerical errors in our paper “The
role of ammonia in sulfuric acid ion induced nucleation”
by I. K. Ortega et al. (Atmos. Chem. Phys., 8, 2859–
2867, 2008). We discovered that i...
Results of the first air ion spectrometer calibration and intercomparison workshop
first air ion spectrometer calibration intercomparison workshop
2009/3/12
The Air Ion Spectrometer (AIS) measures mobility and size distributions of atmospheric ions. The Neutral cluster and Air Ion Spectrometer (NAIS) can additionally measure neutral particles. The number ...
Ion production rate in a boreal forest based on ion, particle and radiation measurements
Ion production rate boreal forest ion particle radiation
2009/3/6
In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon concentra...
Formation of binary ion clusters from polar vapours: effect of the dipole-charge interaction
binary ion clusters polar vapours dipole-charge interaction
2009/2/23
Formation of binary cluster ions from polar vapours is considered. The effect of vapour polarity on the size and composition of the critical clusters is investigated theoretically and a corrected vers...
From molecular clusters to nanoparticles: second-generation ion-mediated nucleation model
molecular clusters nanoparticles second-generation ion-mediated nucleation model
2009/1/19
Ions, which are generated in the atmosphere by galactic cosmic rays and other ionization sources, may play an important role in the formation of atmospheric aerosols. In the paper, a new second-genera...
Mass concentration and ion composition of coarse and fine particles in an urban area in Beirut: effect of calcium carbonate on the absorption of nitric and sulfuric acids and the depletion of chloride
Mass concentration effect of calcium carbonate absorption of nitric and sulfuric acids the depletion of chloride
2009/1/8
Levels of coarse (PM10-2.5) and fine (PM2.5) particles were determined between February 2004 and January 2005 in the city of Beirut, Lebanon. While low PM mass concentrations were measured in the rai...
Ambient sesquiterpene concentration and its link to air ion measurements
sesquiterpene air ion
2008/12/11
Ambient air ion size distributions have been measured continuously at the Finnish boreal forest site in Hyytiälä since spring 2003. In general, these measurements show a maximum of air ions ...
Technical Note: Molecular characterization of aerosol-derived water soluble organic carbon using ultrahigh resolution electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry
aerosol-derived water soluble organic carbon ultrahigh resolution electrospray ionization ion cyclotron resonance mass spectrometry
2008/11/18
Despite the acknowledged relevance of aerosol-derived water-soluble organic carbon (WSOC) to climate and biogeochemical cycling, characterization of aerosol WSOC has been limited. Electrospray ionizat...
Amines are likely to enhance neutral and ion-induced sulfuric acid-water nucleation in the atmosphere more effectively than ammonia
Amines sulfuric acid-water nucleation ammonia
2008/11/13
We have studied the structure and formation thermodynamics of dimer clusters containing H2SO4 or HSO4− together with ammonia and seven different amines possibly present in the atmosphere, using ...
Chemistry of sprite discharges through ion-neutral reactions
sprite discharges ion-neutral reactions
2008/11/13
We estimate the concentration changes, caused by streamer discharge in sprites, of ozone and related minor species as odd nitrogen (NOx) and hydrogen (HOx) families in the upper stratosphere and mesos...
The role of ammonia in sulfuric acid ion induced nucleation
ammonia sulfuric acid ion nucleation
2008/11/10
We have developed a new multi-step strategy for quantum chemical calculations on atmospherically relevant cluster structures that makes calculation for large clusters affordable with a good accuracy-t...