The Ion and Charged Aerosol Growth Enhancement (ION-CAGE) code: a numerical model for the growth of charged and neutral aerosols

J. Svensmark*, N. J. Shaviv, M. B. Enghoff, H. Svensmark

*Corresponding author for this work

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    Abstract

    The presence of small ions influences the growth dynamics of a size distribution of aerosols. Specifically the often neglected mass of small ions influences the aerosol growth rate, which may be important for terrestrial cloud formation. To this end, we develop a numerical model to calculate the growth of a species of aerosols in the presence of charge, which explicitly includes terms for ion-condensation. It is shown that a positive contribution to aerosol growth rate is obtained by increasing the ion-pair concentration through this effect, consistent with recent experimental findings. The ion-condensation effect is then compared to aerosol growth from charged aerosol coagulation, which is seen to be independent of ion-pair concentration. The model source code is made available through a public repository.
    Original languageEnglish
    Article numbere2020EA001142
    JournalJournal of Geophysical Research: Atmospheres
    Volume7
    Issue number9
    Number of pages22
    ISSN2169-897X
    DOIs
    Publication statusPublished - 2020

    Bibliographical note

    This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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