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

Roldin, Pontus (author): Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of Helsinki

Liao, L. (author)

Mogensen, D. (author)

Dal Maso, M. (author)

Rusanen, A. (author)

Kerminen, V. -M. (author)

Mentel, T. F. (author)

Wildt, J. (author)

Kleist, E. (author)

Kiendler-Scharr, A. (author)

Tillmann, R. (author)

Ehn, M. (author)

Kulmala, M. (author)

Boy, M. (author)

(creator_code:org_t)

2015-09-28
2015
English.
In: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7324. ; 15:18, s. 10777-10798

Related links:: http://dx.doi.org/10... (free); show more...; https://www.atmos-ch...; https://lup.lub.lu.s...; https://doi.org/10.5...; show less...

Abstract Subject headings

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.

By the author/editor: Roldin, Pontus; Liao, L.; Mogensen, D.; Dal Maso, M.; Rusanen, A.; Kerminen, V. -M.; show more...; Mentel, T. F.; Wildt, J.; Kleist, E.; Kiendler-Scharr, ...; Tillmann, R.; Ehn, M.; Kulmala, M.; Boy, M.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

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