Indirect evidence of the composition of nucleation mode atmospheric particles in the high Arctic

Maria Giamarelou, Konstantinos Eleftheriadis*, Stephan Nyeki, Peter Tunved, Kjetil Torseth, George Biskos

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)
35 Downloads (Pure)


Previous long-term observations have shown that nanoparticle formation events are common in the summer-time high Arctic and linked to local photochemical activity. However, current knowledge is limited with respect to the chemical precursors of resulting nanoparticles and the compounds involved in their subsequent growth. Here we report case-study measurements during new particle formation (NPF) events of the particle size distribution (diameter > 7 nm) and for the first time the volatility of monodisperse particles having diameter ≤40 nm, providing indirect information about their composition. Volatility measurements provide indirect evidence that a predominant fraction of the 12 nm particle population is ammoniated sulfates in the summertime high Arctic. Our observations further suggest that the majority of the sub-40 nm particle population during NPF events does not exist in the form of sulfuric acid but rather as partly or fully neutralized ammoniated sulfates.

Original languageEnglish
Pages (from-to)965-975
Number of pages11
JournalJournal Of Geophysical Research-Atmospheres
Issue number2
Publication statusPublished - 27 Jan 2016


  • ammonium sulfate
  • high Arctic
  • nucleation


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