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Title: Analysis of nucleation events in the European boundary layer using the regional aerosol-climate model REMO-HAM with a solar radiation-driven OH-proxy
Authors: Pietikäinen, J.-P.Mikkonen, S.Hamed, A.Hienola, A. I.Birmili, W.Kulmala, M.Laaksonen, A.
Publishers Version: https://doi.org/10.5194/acp-14-11711-2014
Issue Date: 2014
Published in: Atmospheric Chemistry and Physics, Volume 14, Issue 21, Page 11711-11729
Publisher: München : European Geopyhsical Union
Abstract: 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.
Keywords: aerosol composition; aerosol formation; boundary layer; climate modeling; concentration (composition); hydroxyl radical; nucleation; solar radiation
DDC: 550
License: CC BY 3.0 Unported
Link to License: https://creativecommons.org/licenses/by/3.0/
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