| DOI: | 10.2172/1010861
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| 报告号: | DOE/ER61549-1
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| 报告题名: | Application of Improved Radiation Modeling to General Circulation Models |
| 作者: | Williams, Dean N. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)]
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| 出版年: | 2011
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| 发表日期: | 2011-04-07
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | radiation
; radiative transfer
; climate modeling
; general circulation models
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| 中文主题词: | 吸收
; 辐射强迫[作用])
; 散射
; 云
; 吸附作用
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| 主题词: | ABSORPTION
; RADIATIVE FORCING
; SCATTERING
; CLOUDS
|
| 英文摘要: | This research has accomplished its primary objectives of developing accurate and efficient radiation codes, validating them with measurements and higher resolution models, and providing these advancements to the global modeling community to enhance the treatment of cloud and radiative processes in weather and climate prediction models. A critical component of this research has been the development of the longwave and shortwave broadband radiative transfer code for general circulation model (GCM) applications, RRTMG, which is based on the single-column reference code, RRTM, also developed at AER. RRTMG is a rigorously tested radiation model that retains a considerable level of accuracy relative to higher resolution models and measurements despite the performance enhancements that have made it possible to apply this radiation code successfully to global dynamical models. This model includes the radiative effects of all significant atmospheric gases, and it treats the absorption and scattering from liquid and ice clouds and aerosols. RRTMG also includes a statistical technique for representing small-scale cloud variability, such as cloud fraction and the vertical overlap of clouds, which has been shown to improve cloud radiative forcing in global models. This development approach has provided a direct link from observations to the enhanced radiative transfer provided by RRTMG for application to GCMs. Recent comparison of existing climate model radiation codes with high resolution models has documented the improved radiative forcing capability provided by RRTMG, especially at the surface, relative to other GCM radiation models. Due to its high accuracy, its connection to observations, and its computational efficiency, RRTMG has been implemented operationally in many national and international dynamical models to provide validated radiative transfer for improving weather forecasts and enhancing the prediction of global climate change. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1010861
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40258
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1010861.pdf（6903KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Williams, Dean N. [Lawrence Livermore National Lab. . Application of Improved Radiation Modeling to General Circulation Models. 2011-01-01.
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