globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-14-00599.1
Scopus记录号: 2-s2.0-84944088518
论文题名:
Effects of localized grid refinement on the general circulation and climatology in the community atmosphere model
作者: Zarzycki C.M.; Jablonowski C.; Thatcher D.R.; Taylor M.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期:7
起始页码: 2777
结束页码: 2803
语种: 英语
Scopus关键词: Climatology ; Fighter aircraft ; Precipitation (meteorology) ; Atmospheric model intercomparison projects ; Climate variability ; Community atmosphere model ; Extreme precipitation events ; General circulation model ; Model evaluation/performance ; Multi-grid model ; National center for atmospheric researches ; Climate models ; atmospheric modeling ; climate change ; climate modeling ; climatology ; general circulation model
英文摘要: Using the spectral element (SE) dynamical core within the National Center for Atmospheric Research-Department of Energy Community Atmosphere Model (CAM), a regionally refined nest at 0.25° (~28 km) horizontal resolution located over the North Atlantic is embedded within a global 1° (~111 km) grid. A 23-yr simulation using Atmospheric Model Intercomparison Project (AMIP) protocols and default CAM, version 5, physics is compared to an identically forced run using the global 1° (~111 km) grid without refinement. The addition of a refined patch over the Atlantic basin does not noticeably affect the global circulation. In the area where the refinement is located, large-scale precipitation increases with the higher resolution. This increase is partly offset by a decrease in precipitation resulting from convective parameterizations, although total precipitation is also slightly higher at finer resolutions. Equatorial waves are not significantly impacted when traversing multiple grid spacings. Despite the grid transition region bisecting northern Africa, local zonal jets and African easterly wave activity are highly similar in both simulations. The frequency of extreme precipitation events increases with resolution, although this increase is restricted to the refined patch. Topography is better resolved in the nest as a result of finer grid spacing. The spatial patterns of variables with strong orographic forcing (such as precipitation, cloud, and precipitable water) are improved with local refinement. Additionally, dynamical features, such as wind patterns, associated with steep terrain are improved in the variable-resolution simulation when compared to the uniform coarser run. © 2015 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/50673
Appears in Collections:气候变化事实与影响

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作者单位: Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, United States; Sandia National Laboratories, Albuquerque, NM, United States; National Center for Atmospheric Research, Boulder, CO, United States

Recommended Citation:
Zarzycki C.M.,Jablonowski C.,Thatcher D.R.,et al. Effects of localized grid refinement on the general circulation and climatology in the community atmosphere model[J]. Journal of Climate,2015-01-01,28(7)
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