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| Aerosol Indirect Effects on Warm Clouds in the Grid-Point Atmospheric Model of IAP LASG (GAMIL) |
| SHI Xiang-Jun,WANG Bin,LIU Xiao-Hong,WANG Ming-Huai,LI Li-Juan,DONG Li |
| 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China,1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China,2. Pacific Northwest National Laboratory, Richland, Washington 99352, USA,2. Pacific Northwest National Laboratory, Richland, Washington 99352, USA,1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China,1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China |
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Abstract Aerosol indirect effects on warm clouds are estimated in the Grid-point Atmospheric Model of IAP LASG (GAMIL) with a new two-moment cloud microphysics scheme using two different physically-based aerosol activation parameterizations: Abdul-Razzak and Ghan, and Nenes and Seinfeld. The annual global mean changes in shortwave cloud forcing from preindustrial times to present day (a measure of the aerosol indirect effects) estimated from these two parameterizations are remarkably similar: 0.76 W m-2 with the Abdul-Razzak and Ghan parameterization, and 0.78 W m-2 with the Nenes and Seinfeld parameterization. Physically-based parameterizations can provide robust representations of aerosol effects on droplet nucleation, meaning that aerosol activation is no longer the most uncertain factor in modeling aerosol indirect effects.
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Received: 12 July 2010
Revised: 13 July 2010
Accepted: 14 July 2010
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