Articles | Volume 18, issue 12
https://doi.org/10.5194/gmd-18-3965-2025
https://doi.org/10.5194/gmd-18-3965-2025
Development and technical paper
 | 
01 Jul 2025
Development and technical paper |  | 01 Jul 2025

Numerical investigations on the modelling of ultrafine particles in SSH-aerosol-v1.3a: size resolution and redistribution

Oscar Jacquot and Karine Sartelet

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Cited articles

Adams, P. J. and Seinfeld, J. H.: Predicting Global Aerosol Size Distributions in General Circulation Models, J. Geophys. Res.-Atmos, 107, AAC 4–1–AAC 4–23, https://doi.org/10.1029/2001JD001010, 2002. a, b
Appel, K. W., Bash, J. O., Fahey, K. M., Foley, K. M., Gilliam, R. C., Hogrefe, C., Hutzell, W. T., Kang, D., Mathur, R., Murphy, B. N., Napelenok, S. L., Nolte, C. G., Pleim, J. E., Pouliot, G. A., Pye, H. O. T., Ran, L., Roselle, S. J., Sarwar, G., Schwede, D. B., Sidi, F. I., Spero, T. L., and Wong, D. C.: The Community Multiscale Air Quality (CMAQ) model versions 5.3 and 5.3.1: system updates and evaluation, Geosci. Model Dev., 14, 2867–2897, https://doi.org/10.5194/gmd-14-2867-2021, 2021. a
Binkowski, F. S. and Roselle, S. J.: Models-3 Community Multiscale Air Quality (CMAQ) Model Aerosol Component 1. Model Description, J. Geophys. Res.-Atmos., 108, D21305, https://doi.org/10.1029/2001JD001409, 2003. a
Chang, J. C. and Hanna, S. R.: Air Quality Model Performance Evaluation, Meteorol. Atmos. Phys., 87, 167–196, https://doi.org/10.1007/s00703-003-0070-7, 2004. a
Chang, W., Zhang, Y., Li, Z., Chen, J., and Li, K.: Improving the sectional Model for Simulating Aerosol Interactions and Chemistry (MOSAIC) aerosols of the Weather Research and Forecasting-Chemistry (WRF-Chem) model with the revised Gridpoint Statistical Interpolation system and multi-wavelength aerosol optical measurements: the dust aerosol observation campaign at Kashi, near the Taklimakan Desert, northwestern China, Atmos. Chem. Phys., 21, 4403–4430, https://doi.org/10.5194/acp-21-4403-2021, 2021. a
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Short summary
Modelling the size distribution and the number concentration is important to represent ultrafine particles. A new analytic formulation is presented to compute coagulation partition coefficients, allowing us to lower the numerical diffusion associated with the resolution of aerosol dynamics. The significance of this effect is assessed in a 0D box model and over greater Paris with a chemistry transport model, using different size resolutions of the particle distribution.
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