Sensitivity Experiments on the Effects of Optical Properties of Dust Aerosols on Their Radiative Forcing under Clear Sky Condition(<Special Issue>ADEC-Aeolian Dust Experiment on Climate Impact-)
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概要
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There are many uncertainties in the quantitative assessment of radiative effects due to atmospheric dust aerosol and the optical properties of dust particles contribute large to them. Numerical sensitivity experiments to evaluate the impacts of optical characteristics on the radiative forcing have been performed in this study. The experiments involve the effects of refractive indices, single scattering albedo, asymmetry factor and optical depth of the dust particles. An updated data set of refractive indices representing East Asian dust and the data set recommended by World Meteorology Organization (WMO) are used in our calculations for comparison. A k-distribution model for solar and thermal radiation transfer is employed in the calculation of radiative forcing. It is found that comparing with the WMO model, East Asian dust model has stronger scattering and weaker absorption at solar regime, which leads to higher negative forcing at the top of atmosphere (TOA) in this study. The more important is the signs of radiative forcing at TOA over certain regions could be reversed for the two dust models, which emphasizes the essentiality of accurate measurements of optical properties of dust aerosols for quantitatively estimating their radiative forcing.
- 社団法人日本気象学会の論文
- 2005-03-31
著者
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LI Wei
State Key Lab of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramic
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Shi Guangyu
State Key Laboratory Of Numerical Modeling For Atmospheric Science And Geophysical Fluid Dynamics In
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Aoki Teruo
Meteorological Res. Inst. Tsukuba
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Wang Hong
State Key Laboratory Of Element Organic Chemistry Institute Of Element Organic Chemistry Nankai Univ
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Wang Biao
State Key Laboratory For Modification Of Chemical Fiber And Polymers College Of Material Science And
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Wang Biao
State Key Laboratory Of Numerical Modeling For Atmospheric Science And Geophysical Fluid Dynamics In
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Gong Sunling
Air Quality Research Branch Meteorological Service Of Canada
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ZHAO Tianliang
Air Quality Research Branch, Meteorological Service of Canada
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Zhao Tianliang
Air Quality Research Branch Meteorological Service Of Canada
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Li Wei
State Key Laboratory Of Numerical Modeling For Atmospheric Science And Geophysical Fluid Dynamics In
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Wang Hong
State Key Laboratory Of Numerical Modeling For Atmospheric Science And Geophysical Fluid Dynamics In
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