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Erik Swietlicki. Foto.

Erik Swietlicki

Professor

Erik Swietlicki. Foto.

Development and characterization of the Portable Ice Nucleation Chamber 2 (PINCii)

Författare

  • Dimitri Castarède
  • Zoé Brasseur
  • Yusheng Wu
  • Zamin A. Kanji
  • Markus Hartmann
  • Lauri Ahonen
  • Merete Bilde
  • Markku Kulmala
  • Tuukka Petäjä
  • Jan B.C. Pettersson
  • Berko Sierau
  • Olaf Stetzer
  • Frank Stratmann
  • Birgitta Svenningsson
  • Erik Swietlicki
  • Quynh Thu Nguyen
  • Jonathan Duplissy
  • Erik S. Thomson
Visa allt

Summary, in English

The Portable Ice Nucleation Chamber 2 (PINCii) is a newly developed continuous flow diffusion chamber (CFDC) for measuring ice nucleating particles (INPs). PINCii is a vertically oriented parallel-plate CFDC that has been engineered to improve upon the limitations of previous generations of CFDCs. This work presents a detailed description of the PINCii instrument and the upgrades that make it unique compared with other operational CFDCs. The PINCii design offers several possibilities for improved INP measurements. Notably, a specific icing procedure results in low background particle counts, which demonstrates the potential for PINCii to measure INPs at low concentrations (<10L-1). High-spatial-resolution wall-temperature mapping enables the identification of temperature inhomogeneities on the chamber walls. This feature is used to introduce and discuss a new method for analyzing CFDC data based on the most extreme lamina conditions present within the chamber, which represent conditions most likely to trigger ice nucleation. A temperature gradient can be maintained throughout the evaporation section in addition to the main chamber, which enables PINCii to be used to study droplet activation processes or to extend ice crystal growth. A series of both liquid droplet activation and ice nucleation experiments were conducted at temperature and saturation conditions that span the spectrum of PINCii's operational conditions (-50≤temperature≤-15°C and 100 ≤ relative humidity with respect to ice≤160%) to demonstrate the instrument's capabilities. In addition, typical sources of uncertainty in CFDCs, including particle background, particle loss, and variations in aerosol lamina temperature and relative humidity, are quantified and discussed for PINCii.

Avdelning/ar

  • Förbränningsfysik
  • LTH profilområde: Aerosoler
  • Kärnfysik
  • MERGE: ModElling the Regional and Global Earth system
  • LU profilområde: Ljus och material
  • LTH profilområde: Nanovetenskap och halvledarteknologi
  • Metalund
  • Centrum för Aerosolforskning (CAST)
  • Centrum för miljö- och klimatvetenskap (CEC)
  • NanoLund: Centre for Nanoscience

Publiceringsår

2023-08-23

Språk

Engelska

Sidor

3881-3899

Publikation/Tidskrift/Serie

Atmospheric Measurement Techniques

Volym

16

Issue

16

Dokumenttyp

Artikel i tidskrift

Förlag

Copernicus GmbH

Ämne

  • Meteorology and Atmospheric Sciences

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1867-1381