References

ACP

Atmospheric Chemistry and Physics

ACP

Atmos. Chem. Phys.

1680-7324

Copernicus Publications

Göttingen, Germany

10.5194/acp-14-11711-2014

Analysis of nucleation events in the European boundary layer using the regional aerosol–climate model REMO-HAM with a solar radiation-driven OH-proxy

Pietikäinen

J.-P.

https://orcid.org/0000-0002-9270-4739

¹ Mikkonen

https://orcid.org/0000-0003-0595-0657

² Hamed

² ⁵ Hienola

A. I.

https://orcid.org/0000-0002-9612-1477

¹ Birmili

³ Kulmala

https://orcid.org/0000-0003-3464-7825

⁴ Laaksonen

https://orcid.org/0000-0002-1657-2383

² ¹

Finnish Meteorological Institute, P. O. Box 503, 00101 Helsinki, Finland

Department of Applied Physics, University of Eastern Finland, P. O. Box 1627, 70211 Kuopio, Finland

Leibniz Institute for Tropospheric Research (IfT), Permoserstr. 15, 04318 Leipzig, Germany

Department of Physics, University of Helsinki, P. O. Box 44, 00014 Helsinki, Finland

deceased in September 2013

07 11 2014

14 21 11711 11729

2014

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://acp.copernicus.org/articles/14/11711/2014/acp-14-11711-2014.html

The full text article is available as a PDF file from https://acp.copernicus.org/articles/14/11711/2014/acp-14-11711-2014.pdf

This work describes improvements in the regional aerosol–climate model REMO-HAM in order to simulate more realistically the process of atmospheric new particle formation (NPF). A new scheme was implemented to simulate OH radical concentrations using a proxy approach based on observations and also accounting for the effects of clouds upon OH concentrations. Second, the nucleation rate calculation was modified to directly simulate the formation rates of 3 nm particles, which removes some unnecessary steps in the formation rate calculations used earlier in the model. Using the updated model version, NPF over Europe was simulated for the periods 2003–2004 and 2008–2009. The statistics of the simulated particle formation events were subsequently compared to observations from 13 ground-based measurement sites. The new model shows improved agreement with the observed NPF rates compared to former versions and can simulate the event statistics realistically for most parts of Europe.

European Commission

PEGASOS - Pan-European Gas-AeroSol-climate interaction Study (265148)

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