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

In English

Författare

  • 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
Visa allt

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.

Publiceringsår

2015

Språk

Engelska

Sidor

10777-10798

Publikation/Tidskrift/Serie

Atmospheric Chemistry and Physics

Volym

15

Issue

18

Dokumenttyp

Artikel i tidskrift

Förlag

Copernicus GmbH

Ämne

  • Meteorology and Atmospheric Sciences
  • Physical Chemistry

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1680-7324