Preprints
https://doi.org/10.5194/ar-2024-14
https://doi.org/10.5194/ar-2024-14
27 May 2024
 | 27 May 2024
Status: a revised version of this preprint was accepted for the journal AR and is expected to appear here in due course.

On the potential of Cluster Ion Counter (CIC) to observe local new particle formation, condensation sink and growth rate of newly formed particles

Markku Kulmala, Santeri Tuovinen, Sander Mirme, Paap Koemets, Lauri Ahonen, Yongchun Liu, Heikki Junninen, Tuukka Petäjä, and Veli-Matti Kerminen

Abstract. Cluster Ion Counter (CIC) is a simple 3-channel instrument designed to observe ions in the diameter range from 1.0 to 5 nm. With the three channels, we can observe concentrations of both ion clusters (sub-2 nm ions) and intermediate ions. Furthermore, as derived here, we can estimate condensation sink, intensity of local new particle formation, growth rate of newly formed particles from 2 nm to 3 nm, and formation rate of 2 nm ions. We compared CIC measurements with those of a multichannel ion spectrometer, the Neutral cluster and Air Ion Spectrometer (NAIS), and found that the concentrations agreed well between the two instruments, with the correlation coefficients of 0.89 and 0.86 for sub-2 nm and 2.0‒2.3 nm ions, respectively. According to the observations made in Hyytiälä, Finland and Beijing, China, the ion source rate was estimated to be about 2‒4 ion pairs cm‒3 s‒1.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Markku Kulmala, Santeri Tuovinen, Sander Mirme, Paap Koemets, Lauri Ahonen, Yongchun Liu, Heikki Junninen, Tuukka Petäjä, and Veli-Matti Kerminen

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on ar-2024-14', Anonymous Referee #1, 28 Jun 2024
  • RC2: 'Comment on ar-2024-14', Anonymous Referee #2, 03 Jul 2024
    • RC3: 'Reply on RC2', Anonymous Referee #2, 03 Jul 2024
  • RC4: 'Comment on ar-2024-14', Anonymous Referee #3, 08 Jul 2024
  • AC1: 'Comment on ar-2024-14', Markku Kulmala, 22 Aug 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on ar-2024-14', Anonymous Referee #1, 28 Jun 2024
  • RC2: 'Comment on ar-2024-14', Anonymous Referee #2, 03 Jul 2024
    • RC3: 'Reply on RC2', Anonymous Referee #2, 03 Jul 2024
  • RC4: 'Comment on ar-2024-14', Anonymous Referee #3, 08 Jul 2024
  • AC1: 'Comment on ar-2024-14', Markku Kulmala, 22 Aug 2024
Markku Kulmala, Santeri Tuovinen, Sander Mirme, Paap Koemets, Lauri Ahonen, Yongchun Liu, Heikki Junninen, Tuukka Petäjä, and Veli-Matti Kerminen
Markku Kulmala, Santeri Tuovinen, Sander Mirme, Paap Koemets, Lauri Ahonen, Yongchun Liu, Heikki Junninen, Tuukka Petäjä, and Veli-Matti Kerminen

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Short summary
With the recently developed instrument CIC (cluster ion counter) we can observe dynamics of small air ions and intermediate air ions. Furthermore we can observe condensation sink and formation and growth rates for intermediated ions.
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