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Proceedings Paper

Global three-dimensional simulation and radiative forcing of various aerosol species with GCM
Author(s): Toshihiko Takemura; Hajime Okamoto; Atusi Numaguti; Kentaroh Suzuki; Akiko Higurashi; Teruyuki Nakajima
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Paper Abstract

A global three-dimensional transport model that can simultaneously treat main tropospheric aerosols, i.e., carbonaceous (organic and black carbons), sulfate, soil dust, and sea salt, is developed. It is coupled with a Center for Climate System Research (CCSR)/National Institute for Enviormental Studies (NIES) atmospheric general circulation model (AGCM), and the meteorological field of wind, temperature, and specific humidity can be nudged by reanalysis data. Simulated results are compared with not only observations for aerosol concentrations but also the optical thickness and Angstrom exponent retrieved from remote sensing data such as National Oceanic and Atmospheric Administration (NOAA)/Advanced Very High Resolution Radiometer (AVHRR) and Aerosol Robotic Network (AERONET). A general agreement is found between simulated results and observations spatially seasonally, and quantitatively. The present model is also coupled with the radiative process over both the solar and thermal regions. The annual and global mean radiative forcing by anthropogenic aerosols from fossil fuel sources is estimated to be -0.5 W m-2 over the clear sky for the direct effect and -2.0 W m-2 for the indirect effect.

Paper Details

Date Published: 21 February 2001
PDF: 9 pages
Proc. SPIE 4150, Optical Remote Sensing of the Atmosphere and Clouds II, (21 February 2001); doi: 10.1117/12.416964
Show Author Affiliations
Toshihiko Takemura, Univ. of Tokyo (Japan)
Hajime Okamoto, Kashima Space Research Ctr. (Japan)
Atusi Numaguti, Hokkaido Univ. (Japan)
Kentaroh Suzuki, Univ. of Tokyo (Japan)
Akiko Higurashi, National Institute for Environmental Studies (Japan)
Teruyuki Nakajima, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 4150:
Optical Remote Sensing of the Atmosphere and Clouds II
Yasuhiro Sasano; Jinxue Wang; Tadahiro Hayasaka, Editor(s)

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