A study of the aerosol effect on a cloud field with simultaneous use of GCM modeling and satellite observation

Kentaroh Suzuki, Teruyuki Nakajima, Atusi Numaguti, Toshihiko Takemura, Kazuaki Kawamoto, Akiko Higurashi

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    35 Citations (Scopus)

    Abstract

    The indirect effect of aerosols was simulated by a GCM for nonconvective water clouds and was compared with remote sensing results from the Advanced Very High Resolution Radiometer (AVHRR) satellite-borne sensor for January, April, July, and October of 1990. The simulated global distribution of cloud droplet radius showed a land-sea contrast and a characteristic feature along the coastal region similar to the AVHRR results, although cloud droplet radii from GCM calculations and AVHRR retrievals were different over tropical marine regions due to a lack of calculation of cloud-aerosol interaction for convective clouds in the present model and also due to a possible error in the satellite retrieval caused by cirrus and broken cloud contamination. The simulated dependence of the cloud properties on the column aerosol particle number was also consistent with the statistics obtained by the AVHRR remote sensing when a parameterization with the aerosol lifetime effect was incorporated in the simulation. The global average of the simulated liquid water path based on the parameterization with the aerosol lifetime effect showed an insignificant dependence on the aerosol particle number as a result of a global balance of the lifetime effect and the wash-out effect. This dependence was contrary to the results of simulations based on the Sundqvist's parameterization without aerosol lifetime effect; that is, the simulated cloud liquid water path showed a decreasing tendency with the aerosol particle number reflecting only the wash-out effect.

    Original languageEnglish
    Pages (from-to)179-194
    Number of pages16
    JournalJournal of the Atmospheric Sciences
    Volume61
    Issue number2
    DOIs
    Publication statusPublished - Jan 15 2004

    All Science Journal Classification (ASJC) codes

    • Atmospheric Science

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