A Modelling Study of the Effect of Increasing Background Ozone on PM Production in Clouds

  • Robert J. Flanagan
  • Colin D. O'Dowd
Conference paper

The Answers to Urbino Questions (ACCENT policy-driven synthesis report, 2006) highlighted the fact that background ozone concentrations are increasing over Europe. Measurements have shown that levels have increased by up to 5 ppbv/decade over the last 20–30 years and a similar trend is envisioned to be likely in the coming decades. Much of the focus of this increase is on the possible direct health effects of higher levels of ozone. Here, we have investigated the effects that this increase will have on in-cloud PM production. Aerosol-cloudchemistry process model simulations show that this increase in ozone will also lead to a significant increase of in-cloud sulphate production. Indeed, given such a trend by 2,100 almost 20% more sulphate mass will be produced in the simulated cloud cycle than present day.

Keywords PM, cloud processing, ozone


Ozone Level Sulphate Production Background Ozone Process Model Simulation External Mixture 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Answers to Urbino Questions (ACCENT policy-driven synthesis report, 2006).Google Scholar
  2. 2.
    WHO, Air Quality Guidelines for Europe, European Series No. 23, World Health Organization, Copenhagen, Denmark: WHO.Google Scholar
  3. 3.
    Simmonds, P.G., Derwent, R.G., Manning, A.L., and Spain, G., Atmos. Environ. 38(28), 4769–4778 (2004).CrossRefGoogle Scholar
  4. 4.
    O’Dowd, C.D, Lowe, J.A., Clegg, N., Clegg, S.L. and Smith, M.H., J. Geophys. Res., 105, 7143–7160 (2000).CrossRefADSGoogle Scholar
  5. 5.
    Pitzer, K.S., Ion interaction approach: theory and data correlation, in Activity Coefficients in Electrolyte Solutions, Boca Raton, FL: CRC Press, pp. 75–154 (1991).Google Scholar
  6. 6.
    Pruppacher, H.R. and Klett, J.D., Microphysics of Clouds and Precipitation, Dordrecht, The Netherlands: Kluwer (1997).Google Scholar
  7. 7.
    Meng, Z. and Seinfeld. J., Atmos. Environ., 30(16), 2889–2900, (1996).CrossRefGoogle Scholar
  8. 8.
    Vesala, T., Kulmala, M., Rudolf, R., Vrtala, A., and Wagner, P.E., J. Aerosol. Sci., 28(4), 565–598 (1997).CrossRefGoogle Scholar
  9. 9.
    Hienola, J., Kulmala, M., and Laaksonen, A., J. Aerosol Sci., 32, 351–374 (2001).CrossRefGoogle Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Robert J. Flanagan
    • 1
  • Colin D. O'Dowd
    • 1
  1. 1.Department of Experimental Physics and Environmental Change InstituteNational University of IrelandIreland

Personalised recommendations