The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Modelling the contribution of biogenic volatile organic compounds to new particle formation in the Julich plant atmosphere chamber

På svenska

Author

  • Pontus Roldin
  • L. Liao
  • D. Mogensen
  • M. Dal Maso
  • A. Rusanen
  • V. -M. Kerminen
  • T. F. Mentel
  • J. Wildt
  • E. Kleist
  • A. Kiendler-Scharr
  • R. Tillmann
  • M. Ehn
  • M. Kulmala
  • M. Boy
Show all

Summary, in English

We used the Aerosol Dynamics gas- and particle-phase chemistry model for laboratory CHAMber studies (ADCHAM) to simulate the contribution of BVOC plant emissions to the observed new particle formation during photooxidation experiments performed in the Julich Plant-Atmosphere Chamber and to evaluate how well smog chamber experiments can mimic the atmospheric conditions during new particle formation events. ADCHAM couples the detailed gas-phase chemistry from Master Chemical Mechanism with a novel aerosol dynamics and particle phase chemistry module. Our model simulations reveal that the observed particle growth may have either been controlled by the formation rate of semi- and low-volatility organic compounds in the gas phase or by acid catalysed heterogeneous reactions between semi-volatility organic compounds in the particle surface layer (e.g. peroxyhemiacetal dimer formation). The contribution of extremely low-volatility organic gas-phase compounds to the particle formation and growth was suppressed because of their rapid and irreversible wall losses, which decreased their contribution to the nano-CN formation and growth compared to the atmospheric situation. The best agreement between the modelled and measured total particle number concentration (R-2 > 0.95) was achieved if the nano-CN was formed by kinetic nucleation involving both sulphuric acid and organic compounds formed from OH oxidation of BVOCs.

Publishing year

2015

Language

English

Pages

10777-10798

Publication/Series

Atmospheric Chemistry and Physics

Volume

15

Issue

18

Document type

Journal article

Publisher

Copernicus GmbH

Topic

  • Meteorology and Atmospheric Sciences
  • Physical Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 1680-7324