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Ice residual properties in mixed-phase clouds at the high-alpine Jungfraujoch site

Kupiszewski, Piotr; Zanatta, Marco; Mertes, Stephan; Vochezer, Paul 1; Lloyd, Gary; Schneider, Johannes; Schenk, Ludwig; Schnaiter, Martin ORCID iD icon 1; Baltensperger, Urs; Weingartner, Ernest; Gysel, Martin
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Ice residual (IR) and total aerosol properties were measured in mixed-phase clouds (MPCs) at the high-alpine Jungfraujoch research station. Black carbon (BC) content and coating thickness of BC-containing particles were determined using single-particle soot photometers. The ice activated fraction (IAF), derived from a comparison of IR and total aerosol particle size distributions, showed an enrichment of large particles in the IR, with an increase in the IAF from values on the order of 10−4 to 10−3 for 100 nm (diameter) particles to 0.2 to 0.3 for 1 μm (diameter) particles. Nonetheless, due to the high number fraction of submicrometer particles with respect to total particle number, IR size distributions were still dominated by the submicrometer aerosol. A comparison of simultaneously measured number size distributions of BC-free and BC-containing IR and total aerosol particles showed depletion of BC by number in the IR, suggesting that BC does not play a significant role in ice nucleation in MPCs at the Jungfraujoch. The potential anthropogenic climate impact of BC via the glaciation effect in MPCs is therefore likely to be negligible at this site and in environments with similar meteorological conditions and a similar aerosol population. ... mehr

DOI: 10.1002/2016JD024894
Zitationen: 21
Zitationen: 30
Zugehörige Institution(en) am KIT Aerosolforschung (IMKAAF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 2169-897X, 0148-0227, 2156-2202, 2169-8996
KITopen-ID: 1000066086
HGF-Programm 12.01.01 (POF III, LK 01) Clouds in a pertubed atmosphere
Erschienen in Journal of geophysical research / Atmospheres
Verlag John Wiley and Sons
Band 121
Heft 20
Seiten 12,343–12,362
Schlagwörter heterogeneous ice nucleation, mixed-phase clouds, black carbon, ice residuals
Nachgewiesen in Dimensions
Web of Science
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