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  Aerosol physicochemical effects on CCN activation simulated with the chemistry-climate model EMAC

Chang, D. Y., Lelieveld, J., Tost, H., Steil, B., Pozzer, A., & Yoon, J. (2017). Aerosol physicochemical effects on CCN activation simulated with the chemistry-climate model EMAC. Atmospheric Environment, 162, 127-140. doi:10.1016/j.atmosenv.2017.03.036.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-984A-C Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-984B-A
Genre: Zeitschriftenartikel

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 Urheber:
Chang, D. Y.1, Autor              
Lelieveld, J.1, Autor              
Tost, H.2, Autor
Steil, B.1, Autor              
Pozzer, A.1, Autor              
Yoon, J.2, Autor
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, escidoc:1826285              
2external, escidoc:persistent22              

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 Zusammenfassung: This study uses the EMAC atmospheric chemistry-climate model to simulate cloud properties with a prognostic cloud droplet nucleation scheme. We present modeled global distributions of cloud condensation nuclei (CCN) number concentrations and CCN activation rates, together with the effective hygroscopicity parameter κ, to describe the aerosol chemical composition effect on CCN activation. Large particles can easily activate into cloud droplets, even at low κ values due to the dominant size effect in cloud droplet formation. Small particles are less efficiently activated as CCN, and are more sensitive to aerosol composition and supersaturation. Since the dominant fraction of small particles generally originates from anthropogenic precursor emissions over land, this study focuses on the influence of the continental atmosphere, using a prognostic cloud droplet nucleation scheme that considers aerosol-cloud interactions during cloud formation, together with a double-moment cloud microphysics scheme. The agreement of simulated clouds and climate with observations generally improves over the Northern Hemisphere continents, particularly high air pollution regions such as Eastern US, Europe, East Asia by accounting for aerosol-cloud interactions that include impacts of chemical composition on CCN activation.

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Sprache(n): eng - Englisch
 Datum: 2017
 Publikationsstatus: Im Druck publiziert
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000403995900011
DOI: 10.1016/j.atmosenv.2017.03.036
 Art des Abschluß: -

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Titel: Atmospheric Environment
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Oxford [England] : Pergamon
Seiten: - Band / Heft: 162 Artikelnummer: - Start- / Endseite: 127 - 140 Identifikator: ISSN: 1352-2310
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/958480288336