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contributor authorTakemura, Toshihiko
contributor authorNakajima, Teruyuki
contributor authorDubovik, Oleg
contributor authorHolben, Brent N.
contributor authorKinne, Stefan
date accessioned2017-06-09T16:02:47Z
date available2017-06-09T16:02:47Z
date copyright2002/02/01
date issued2002
identifier issn0894-8755
identifier otherams-5962.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4200200
description abstractGlobal distributions of the aerosol optical thickness, Ångström exponent, and single-scattering albedo are simulated using an aerosol transport model coupled with an atmospheric general circulation model. All the main tropospheric aerosols are treated, that is, carbonaceous (organic and black carbons), sulfate, soil dust, and sea salt aerosols. The simulated total aerosol optical thickness, Ångström exponent, and single-scattering albedo for mixtures of four aerosol species are compared with observed values from both optical ground-based measurements and satellite remote sensing retrievals at dozens of locations including seasonal variations. The mean difference between the simulation and observations is found to be less than 30% for the optical thickness and less than 0.05 for the single-scattering albedo in most regions. The simulated single-scattering albedo over the Saharan region is, however, substantially smaller than the observation, though the standard optical constant of soil dust is used in this study. The radiative forcing by the direct effect of the main tropospheric aerosols is then estimated. The global annual mean values of the total direct radiative forcing of anthropogenic carbonaceous plus sulfate aerosols are calculated to be ?0.19 and ?0.75 W m?2 under whole-sky and clear-sky conditions at the tropopause, respectively.
publisherAmerican Meteorological Society
titleSingle-Scattering Albedo and Radiative Forcing of Various Aerosol Species with a Global Three-Dimensional Model
typeJournal Paper
journal volume15
journal issue4
journal titleJournal of Climate
identifier doi10.1175/1520-0442(2002)015<0333:SSAARF>2.0.CO;2
journal fristpage333
journal lastpage352
treeJournal of Climate:;2002:;volume( 015 ):;issue: 004
contenttypeFulltext


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