Abstract
In the framework of EURODELTAIII model inter-comparison exercise (Bessagnet et al. 2014), we performed preliminary tests with a volatility basis set (VBS) scheme in the CAMx model to predict the fine organic aerosol concentrations in Europe during one of the EMEP measurement campaigns (February–March 2009). In addition to the traditional (no VBS) approach for organic aerosol modelling, two different assumptions regarding the volatility distribution of primary organic particles were simulated and results compared against aerosol mass spectrometer (AMS) measurements. For the period studied in this work, using the volatility proposed by Robinson et al. (2007) decreased OA concentrations while volatility distribution according to Tsimpidi et al. (2010), Shrivastava et al. (2011) improved the results by about 27 %.
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Acknowledgments
This work was financially supported by the Swiss Federal Office for the Environment (FOEN). We are grateful to ENVIRON for providing us with the CAMx VBS and the EURODELTA community for proving model input data.
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Questioner: P. Builtjes
Questioner: P. Builtjes
Question: You compared the results of non-VBS against VBS-aging for station in Europe. Did you see any differences in improvement between rural and urban-type stations?
Answer: There is one site classified as urban and with elevated organic concentration which is the site of Barcelona. For this site total OA concentrations increase is in general higher than the increase at rural sites. Effects of further aging of BSOA and wood burning vapours are currently under investigation.
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Ciarelli, G., Aksoyoglu, S., Prévôt, A.S.H., Baltensperger, U. (2016). Modelling Organic Aerosol in Europe: Application of the CAMx Model with a Volatility Basis Set Within the Eurodelta III Exercise. In: Steyn, D., Chaumerliac, N. (eds) Air Pollution Modeling and its Application XXIV. Springer Proceedings in Complexity. Springer, Cham. https://doi.org/10.1007/978-3-319-24478-5_2
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DOI: https://doi.org/10.1007/978-3-319-24478-5_2
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