globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-12-00236.1
Scopus记录号: 2-s2.0-84874797242
论文题名:
The Mean Climate of the Community Atmosphere Model (CAM4) in Forced SST and Fully Coupled Experiments
作者: Neale R.B.; Richter J.; Park S.; Lauritzen P.H.; Vavrus S.J.; Rasch P.J.; Zhang M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期:14
起始页码: 5150
结束页码: 5168
语种: 英语
Scopus关键词: Community atmosphere model ; Community climate system model ; Conservation properties ; Convective available potential energies ; Monsoon precipitation ; Sea surface temperature (SST) ; Southern indian ocean ; Thermodynamic consistency ; Atmospheric temperature ; Commerce ; Low temperature drying ; Climate models ; atmospheric modeling ; convective system ; monsoon ; Northern Hemisphere ; potential energy ; precipitation (climatology) ; regional climate ; sea surface temperature ; Arabian Peninsula ; Indian Ocean ; Indian Ocean (South)
英文摘要: The Community Atmosphere Model, version 4 (CAM4), was released as part of the Community Climate System Model, version 4 (CCSM4). The finite volume (FV) dynamical core is now the default because of its superior transport and conservation properties. Deep convection parameterization changes include a dilute plume calculation of convective available potential energy (CAPE) and the introduction of convective momentum transport (CMT). An additional cloud fraction calculation is now performed following macrophysical state updates to provide improved thermodynamic consistency. A freeze-drying modification is further made to the cloud fraction calculation in very dry environments (e.g., the Arctic), where cloud fraction and cloud water values were often inconsistent in CAM3. In CAM4 the FV dynamical core further degrades the excessive trade-wind simulation, but reduces zonal stress errors at higher latitudes. Plume dilution alleviates much of the midtropospheric tropical dry biases and reduces the persistent monsoon precipitation biases over the Arabian Peninsula and the southern Indian Ocean. CMT reduces much of the excessive tradewind biases in eastern ocean basins. CAM4 shows a global reduction in cloud fraction compared to CAM3, primarily as a result of the freeze-drying and improved cloud fraction equilibrium modifications. Regional climate feature improvements include the propagation of stationary waves from the Pacific into midlatitudes and the seasonal frequency of Northern Hemisphere blocking events. A 18 versus 28 horizontal resolution of the FV dynamical core exhibits superior improvements in regional climate features of precipitation and surface stress. Improvements in the fully coupled mean climate between CAM3 and CAM4 are also more substantial than in forced sea surface temperature (SST) simulations.©2013 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51790
Appears in Collections:气候变化事实与影响

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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; Center for Climatic Research, University of Wisconsin-Madison, Madison, WI, United States; Pacific Northwest National Laboratory, Richland, WA, United States; School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, NY, United States

Recommended Citation:
Neale R.B.,Richter J.,Park S.,et al. The Mean Climate of the Community Atmosphere Model (CAM4) in Forced SST and Fully Coupled Experiments[J]. Journal of Climate,2013-01-01,26(14)
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