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Personen: Baumgartner, Manuel (Autor) 
Spichtinger, Peter (Autor) 
Titel: Towards a bulk approach to local interactions of hydrometeors
58008.pdf (648 KB) PDF
Quelle: Atmospheric chemistry and physics. Bd. 18. H. 4. Katlenburg-Lindau : EGU. S. 2525 - 2546
Erscheinungsjahr:    2018
ISBN / ISSN: 1680-7324
URL der Originalveröffentlichung doi:10.5194/acp-18-2525-2018
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access: OpenAccess
Personen der Universität:    Baumgartner, Manuel  In UnivIS suchen  ; Spichtinger, Peter  In UnivIS suchen 
Einrichtungen: Institut für Physik der Atmosphäre
Zentrum für Datenverarbeitung
DDC-Sachgruppe:    Physik
ID: 58008  Universitätsbibliothek Mainz
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Abstract: The growth of small cloud droplets and ice crystals is dominated by the diffusion of water vapor. Usually, Maxwell’s approach to growth for isolated particles is used in describing this process. However, recent investigations show that local interactions between particles can change diffusion properties of cloud particles. In this study we develop an approach for including these local interactions into a bulk model approach. For this purpose, a simplified framework of local interaction is proposed and governing equations are derived from this setup. The new model is tested against direct simulations and incorporated into a parcel model framework. Using the parcel model, possible implications of the new model approach for clouds are investigated. The results indicate that for specific scenarios the lifetime of cloud droplets in subsaturated air may be longer (e.g., for an initially water supersaturated air parcel within a downdraft). These effects might have an impact on mixed-phase clouds, for example in terms of riming efficiencies.
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