Surfactant effects in global simulations of cloud droplet activation

N. L. Prisle, A. Asmi, D. Topping, A. I. Partanen, S. Romakkaniemi, M. Dal Maso, M. Kulmala, A. Laaksonen, K. E J Lehtinen, G. McFiggans, H. Kokkola

    Research output: Contribution to journalArticlepeer-review

    58 Downloads (Pure)

    Abstract

    Atmospheric aerosols often contain surface active organics. We study the influence of these surfactants on predictions of particle cloud activation potential and aerosol indirect climate effects, by implementing different parametrizations of surfactant effects in the global circulation model ECHAM5.5-HAM2. A parametrization based only on droplet surface tension reduction produces significantly larger effects on predicted cloud droplet numbers than novel parametrizations based on detailed considerations of organic surface activity. It seems better to disregard surfactant effects altogether than employing parametrizations accounting only for effects on surface tension. We strongly recommend not using only the surface tension reduction to represent the surfactant effects in climate models. Copyright 2012 by the American Geophysical Union.
    Original languageEnglish
    Article numberL05802
    JournalGeophysical Research Letters
    Volume39
    Issue number5
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Dive into the research topics of 'Surfactant effects in global simulations of cloud droplet activation'. Together they form a unique fingerprint.

    Cite this