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New particle formation and growth in biomass burning plumes: An important source of cloud condensation nuclei
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
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2012 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 39, L09805- p.Article in journal (Refereed) Published
Abstract [en]

Experiments were performed in an environmental chamber to characterize the effects of photo-chemical aging on biomass burning emissions. Photo-oxidation of dilute exhaust from combustion of 12 different North American fuels induced significant new particle formation that increased the particle number concentration by a factor of four (median value). The production of secondary organic aerosol caused these new particles to grow rapidly, significantly enhancing cloud condensation nuclei (CCN) concentrations. Using inputs derived from these new data, global model simulations predict that nucleation in photo-chemically aging fire plumes produces dramatically higher CCN concentrations over widespread areas of the southern hemisphere during the dry, burning season (Sept.-Oct.), improving model predictions of surface CCN concentrations. The annual indirect forcing from CCN resulting from nucleation and growth in biomass burning plumes is predicted to be -0.2 W m(-2), demonstrating that this effect has a significant impact on climate that has not been previously considered. Citation: Hennigan, C. J., D. M. Westervelt, I. Riipinen, G. J. Engelhart, T. Lee, J. L. Collett Jr., S. N. Pandis, P. J. Adams, and A. L. Robinson (2012), New particle formation and growth in biomass burning plumes: An important source of cloud condensation nuclei, Geophys. Res. Lett., 39, L09805, doi: 10.1029/2012GL050930.

Place, publisher, year, edition, pages
2012. Vol. 39, L09805- p.
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Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-80103DOI: 10.1029/2012GL050930ISI: 000304005700001OAI: oai:DiVA.org:su-80103DiVA: diva2:553405
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AuthorCount:9;

Available from: 2012-09-19 Created: 2012-09-12 Last updated: 2017-12-07Bibliographically approved

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