• English
    • suomi
  • English 
    • English
    • suomi
  • Login
View Item 
  •   Home
  • Artikkelit
  • Luonnontieteiden ja metsätieteiden tiedekunta
  • View Item
  •   Home
  • Artikkelit
  • Luonnontieteiden ja metsätieteiden tiedekunta
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation

Thumbnail
View/Open
Article (2.468Mb)
Self archived version
published version
Date
2018
Author
Frege, Carla
Ortega, Ismael K
Rissanen, Matti P
Praplan, Arnaud P
Steiner, Gerhard
Heinritzi, Martin
Ahonen, Lauri
Amorim, António
Bernhammer, Anne-Kathrin
Bianchi, Federico
Brilke, Sophia
Breitenlechner, Martin
Dada, Lubna
Dias, António
Duplissy, Jonathan
Ehrhart, Sebastian
El-Haddad, Imad
Fischer, Lukas
Fuchs, Claudia
Garmash, Olga et al [incl Schobesberger Siegfried]
Unique identifier
10.5194/acp-18-65-2018
Metadata
Show full item record
More information
Research Database SoleCris

Self-archived article

Citation
Frege, Carla. Ortega, Ismael K. Rissanen, Matti P. Praplan, Arnaud P. Steiner, Gerhard. Heinritzi, Martin. Ahonen, Lauri. Amorim, António. Bernhammer, Anne-Kathrin. Bianchi, Federico. Brilke, Sophia. Breitenlechner, Martin. Dada, Lubna. Dias, António. Duplissy, Jonathan. Ehrhart, Sebastian. El-Haddad, Imad. Fischer, Lukas. Fuchs, Claudia. Garmash, Olga et al [incl Schobesberger Siegfried]. (2018). Influence of temperature on the molecular composition of ions and charged clusters during pure biogenic nucleation.  ATMOSPHERIC CHEMISTRY AND PHYSICS, 18 (1) , 65-79. 10.5194/acp-18-65-2018.
Rights
© Authors
Licensed under
CC BY http://creativecommons.org/licenses/by/4.0/
Abstract

It was recently shown by the CERN CLOUD experiment that biogenic highly oxygenated molecules (HOMs) form particles under atmospheric conditions in the absence of sulfuric acid, where ions enhance the nucleation rate by 1–2 orders of magnitude. The biogenic HOMs were produced from ozonolysis of α-pinene at 5 °C. Here we extend this study to compare the molecular composition of positive and negative HOM clusters measured with atmospheric pressure interface time-of-flight mass spectrometers (APi-TOFs), at three different temperatures (25, 5 and −25 °C). Most negative HOM clusters include a nitrate (NO3−) ion, and the spectra are similar to those seen in the nighttime boreal forest. On the other hand, most positive HOM clusters include an ammonium (NH4+) ion, and the spectra are characterized by mass bands that differ in their molecular weight by ∼ 20 C atoms, corresponding to HOM dimers. At lower temperatures the average oxygen to carbon (O : C) ratio of the HOM clusters decreases for both polarities, reflecting an overall reduction of HOM formation with decreasing temperature. This indicates a decrease in the rate of autoxidation with temperature due to a rather high activation energy as has previously been determined by quantum chemical calculations. Furthermore, at the lowest temperature (−25 °C), the presence of C30 clusters shows that HOM monomers start to contribute to the nucleation of positive clusters. These experimental findings are supported by quantum chemical calculations of the binding energies of representative neutral and charged clusters.

URI
https://erepo.uef.fi/handle/123456789/6216
Link to the original item
http://dx.doi.org/10.5194/acp-18-65-2018
Publisher
Copernicus GmbH
Collections
  • Luonnontieteiden ja metsätieteiden tiedekunta
University of Eastern Finland
OpenAccess
eRepo
erepo@uef.fi
Send Feedback
OpenUEF
Service provided by
the University of Eastern Finland Library
Library web pages
Twitter
Facebook
Youtube
Library blog
 

Browse

All of the ArchiveResource types & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login
University of Eastern Finland
OpenAccess
eRepo
erepo@uef.fi
Send Feedback
OpenUEF
Service provided by
the University of Eastern Finland Library
Library web pages
Twitter
Facebook
Youtube
Library blog