Preprints
https://doi.org/10.5194/amt-2021-147
https://doi.org/10.5194/amt-2021-147

  14 Jun 2021

14 Jun 2021

Review status: this preprint is currently under review for the journal AMT.

Characterisation of the Manchester Aerosol Chamber facility

Yunqi Shao1,, Yu Wang1,, Mao Du1,, Aristeidis Voliotis1,, M. Rami Alfarra1,2,a, S. Fiona Turner1,b, and Gordon McFiggans1 Yunqi Shao et al.
  • 1Centre for Atmospheric Science, Department of Earth and Environmental Sciences, School of Natural Sciences, University of Manchester, Manchester, M13 9PL, United Kingdom
  • 2National Centre for Atmospheric Science (NCAS), University of Manchester, Manchester, M13 9PL, United Kingdom
  • anow at: Environment & Sustainability Center, Qatar Environment & Energy Research Institute, 34110, Doha, Qatar
  • bnow at: AMETEK Land, Dronfield, Derbyshire, S18 1DJ, United Kingdom
  • These authors contributed equally to this work.

Abstract. This study describes the design of the Manchester Aerosol Chamber (MAC) and its comprehensive characterisation. The MAC is designed to investigate multi-phase chemistry and the evolution of aerosol physico-chemical properties from the real-world emissions (e.g. diesel engine, plants) or of secondary organic aerosol (SOA) produced from pure volatile organic compounds (VOCs). Additionally, the generated aerosol particles in MAC can be transferred to the Manchester Ice Cloud Chamber (MICC), which enables investigation of cloud formation in warm, mixed-phase and fully glaciated conditions (with T as low as −55 °C). MAC is an 18 m3 FEP Teflon chamber, with the potential to conduct experiments at controlled temperature (15–35 °C) and relative humidity (25–80 %) under simulated solar radiation or dark conditions. Detailed characterisations were conducted at common experimental conditions (25 °C, 50 % RH) for actinometry and determination of background contamination, wall losses of gases (NO2, O3, and selected VOCs), aerosol particles at different sizes, auxiliary mechanism and aerosol formation. In addition, the influences of chamber contamination on the wall loss rate of gases and particles, and the photolysis of NO2 were estimated.

Yunqi Shao et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Review on amt-2021-147', Anonymous Referee #1, 21 Jul 2021
  • RC2: 'Comment on amt-2021-147', Anonymous Referee #2, 19 Aug 2021

Yunqi Shao et al.

Yunqi Shao et al.

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Short summary
This study describes the design and characterization of the Manchester Aerosol Chamber (MAC). MAC has good temperature and RH homogeneity, fast mixing times and comparable losses of gases and particles with other chambers. We also investigate the effect of contamination on chamber performance and we explore the SOA mass changes after applying various wall-loss correction methods. Our results highlight the need for tracking chamber performance by conducting regular characterization experiments.