Evaluation of a relationship between aerosols and surface downward shortwave flux through an integrative analysis of a global aerosol-transport model and in-situ measurements

Daisuke Goto, Shuhei Kanazawa, Teruyuki Nakajima, Toshihiko Takemura

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Although aerosols have great impacts on Surface Downward Shortwave Flux (SDSF), the relationship between aerosol loading and SDSF in global models has not yet been adequately investigated. In the present study, we attempt to investigate/estimate the effects of aerosol optical thickness (AOT), single scattering albedo (SSA) and amount of precipitable water vapor (PWV) on SDSF through an integrative comparison and analysis of a global aerosol-transport model, SPRINTARS, a radiative transfer model, Rstar, and in-situ measurements, AERONET and BSRN. We found that the AOT difference usually has the strongest impact on the SDSF difference and the SSA difference has a moderate impact over heavy aerosol loading regions, whereas the effect of water vapor can be ignored. Finally, we generated a contour plot to demonstrate the relationships between AOT-SSA-SDSF. For example, at low AOT (e.g., 0.15), the 20 Wm-2 changes in SDSF are required to make more than 0.2 changes of SSA, whereas at high AOT (e.g., 0.85), the same changes in SDSF are required to have only 0.05 changes of SSA.

    Original languageEnglish
    Title of host publicationRadiation Processes in the Atmosphere and Ocean, IRS 2012 - Proceedings of the International Radiation Symposium (IRC/IAMAS)
    Pages680-683
    Number of pages4
    DOIs
    Publication statusPublished - 2013
    EventInternational Radiation Symposium: Radiation Processes in the Atmosphere and Ocean, IRS 2012 - Berlin, Germany
    Duration: Aug 6 2012Aug 10 2012

    Publication series

    NameAIP Conference Proceedings
    Volume1531
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Other

    OtherInternational Radiation Symposium: Radiation Processes in the Atmosphere and Ocean, IRS 2012
    CountryGermany
    CityBerlin
    Period8/6/128/10/12

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Fingerprint Dive into the research topics of 'Evaluation of a relationship between aerosols and surface downward shortwave flux through an integrative analysis of a global aerosol-transport model and in-situ measurements'. Together they form a unique fingerprint.

    Cite this