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Initiation of secondary ice production in clouds

Sullivan, Sylvia C.; Hoose, Corinna ORCID iD icon 1; Kiselev, Alexei 1; Leisner, Thomas ORCID iD icon 1; Nenes, Athanasios
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract:

Disparities between the measured concentrations of ice-nucleating particles (INPs) and in-cloud ice crystal number concentrations (ICNCs) have led to the hypothesis that mechanisms other than primary nucleation form ice in the atmosphere. Here, we model three of these secondary production mechanisms - rime splintering, frozen droplet shattering, and ice–ice collisional breakup – with a six-hydrometeor-class parcel model. We perform three sets of simulations to understand temporal evolution of ice hydrometeor number (Nice), thermodynamic limitations, and the impact of parametric uncertainty when secondary production is active. Output is assessed in terms of the number of primarily nucleated ice crystals that must exist before secondary production initiates (NINP(lim)) as well as the ICNC enhancement from secondary production and the timing of a 100-fold enhancement. Nice evolution can be understood in terms of collision-based nonlinearity and the "phasedness" of the process, i.e., whether it involves ice hydrometeors, liquid ones, or both. Ice–ice collisional breakup is the only process for which a meaningful NINP(lim) exists (0.002 up to 0.15 L−1). ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000080418
Originalveröffentlichung
DOI: 10.5194/acp-18-1593-2018
Scopus
Zitationen: 48
Web of Science
Zitationen: 48
Dimensions
Zitationen: 51
Cover der Publikation
Zugehörige Institution(en) am KIT Aerosolforschung (IMKAAF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 05.02.2018
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
urn:nbn:de:swb:90-804184
KITopen-ID: 1000080418
HGF-Programm 12.01.01 (POF III, LK 01) Clouds in a pertubed atmosphere
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 18
Heft 3
Seiten 1593-1610
Nachgewiesen in Dimensions
Scopus
Web of Science
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