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タイトル: A Study of the Aerosol Effect on a Cloud Field with Simultaneous Use of GCM Modeling and Satellite Observation
著者: Suzuki, Kentaroh
Nakajima, Teruyuki
Numaguti, Atusi
Takemura, Toshihiko
Kawamoto, Kazuaki
Higurashi, Akiko
発行日: 2004年1月15日
出版者: American Meteorological Society
掲載誌情報: Journal of the Atmospheric Sciences. Vol. 61, No. 2, 15 January 2004, pp. 179-194
抄録: 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.
URI: http://hdl.handle.net/2261/51872
ISSN: 00224928
出現カテゴリ:014 自然科学
1391010 学術雑誌

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