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The effect of secondary ice production parameterization on the simulation of a cold frontal rainband

Sullivan, Sylvia C.; Barthlott, Christian; Crosier, Jonathan; Zhukov, Ilya; Nenes, Athanasios; Hoose, Corinna

Secondary ice production via processes like rime splintering, frozen droplet shattering, and breakup upon ice hydrometeor collision have been proposed to explain discrepancies between in-cloud ice crystal and ice-nucleating particle numbers. To understand the impact of this additional ice crystal generation on surface precipitation, we present one of the first studies to implement frozen droplet shattering and ice–ice collisional breakup parameterizations in a mesoscale model. We simulate a cold frontal rainband from the Aerosol Properties, PRocesses, And InfluenceS on the Earth's Climate campaign and investigate the impact of the new parameterizations on the simulated ice crystal number concentrations (ICNC) and precipitation. Near the convective regions of the rainband, contributions to ICNC can be as large from secondary production as from primary nucleation, but ICNCs greater than 50L−1 remain underestimated by the model. The addition of the secondary production parameterizations also clearly intensifies the differences in both accumulated precipitation and precipitation rate between the convective towers and non-convective gap regions. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000087979
Veröffentlicht am 28.11.2018
DOI: 10.5194/acp-18-16461-2018
Zitationen: 2
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000087979
HGF-Programm 12.01.01 (POF III, LK 01)
Clouds in a pertubed atmosphere
Erschienen in Atmospheric chemistry and physics
Band 18
Heft 22
Seiten 16461–16480
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 21.11.2018
Nachgewiesen in Web of Science
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