Evaluation of aerosol number concentrations in NorESM with improved nucleation parameterisation
Author:
Makkonen R.ORCID, Seland Ø., Kirkevåg A.ORCID, Iversen T.ORCID, Kristjánsson J. E.
Abstract
Abstract. The Norwegian Earth System Model (NorESM) is evaluated against atmospheric observations of aerosol number concentrations. The model is extended to include an explicit mechanism for new particle formation, and the secondary organic aerosol (SOA) formation from biogenic precursors is revised. Several model experiments are conducted to study the sensitivity of simulated number concentrations to nucleation, SOA formation, black carbon size distribution and model meteorology. Comparison against 60 measurement sites reveals that the model with improved nucleation and SOA scheme performs well in terms of correlation coefficient R2=0.41 calculated against monthly mean observed aerosol number concentrations with a number concentration bias of −6%. NorESM generally overestimates the amplitude of the seasonal cycle, possibly due to too high sensitivity to biogenic precursors. Simulated vertical profiles are also evaluated against 12 flight campaigns.
Publisher
Copernicus GmbH
Reference114 articles.
1. Abdul-Razzak, H. and Ghan, S. J.: A parameterization of aerosol activation 2. Multiple aerosol types, J. Geophys. Res., 105, 6837–6844, 2000. 2. Adams, P. and Seinfeld, J.: Predicting global aerosol size distributions in general circulation models, J. Geophys. Res.-Atmos., % 107, 4-1–4-23, https://doi.org/10.1097/00132985-200204000-00004, 2002. 3. Allan, J., Bower, K., Coe, H., Boudries, H., Jayne, J., Canagaratna, M., Millet, D., Goldstein, A., Quinn, P., Weber, R., and Worsnop, D.: Submicron aerosol composition at Trinidad Head, California, during ITCT 2K2}: {its relationship with gas phase volatile organic carbon and assessment of instrument performance, J. Geophys. Res., 109, D23S24, https://doi.org/10.1029/2003JD004208, 2004. 4. Amundsen, C., Hanssen, J., Semb, A., and Steinnes, E.: Long-range atmospheric transport of trace elements to southern Norway, Atmos. Environ., %JOURNAL ABBREVIATION UPDATED, 26A, 1309–1324, 1992. 5. Anenberg, S., Schwartz, J., Shindell, D., Amann, M., Faluvegi, G., Klimont, Z., Janssens-Maenhout, G., Pozzoli, L., van Dingenen, R., Vignati, E., Emberson, L., Muller, N., Jason West, J., Williams, M., Demkine, V., Kevin Hicks, W., Kuylenstierna, J., Raes, F., and Ramanathan, V.: Global air quality and health co-benefits of mitigating near-term climate change through methane and black carbon emission controls, Environ. Health Persp., % 120, 831–839, https://doi.org/10.1289/ehp.1104301, 2012.
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