| DOI: | 10.1175/JCLI-D-11-00260.1
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| Scopus记录号: | 2-s2.0-84858177920
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| 论文题名: | The low-resolution CCSM4 |
| 作者: | Shields C.A.; Bailey D.A.; Danabasoglu G.; Jochum M.; Kiehl J.T.; Levis S.; Park S.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:12 | | 起始页码: | 3993
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| 结束页码: | 4014
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| 语种: | 英语
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| Scopus关键词: | Climate variability
; Community climate system model
; Computationally efficient
; Dynamical core
; Equilibrium simulations
; Finite volume
; Fully-coupled
; Heat transport
; Historical records
; Horizontal grid
; Model approximates
; Northern Hemispheres
; Pre-industrial conditions
; Sea ice extent
; Sea surface temperature (SST)
; Sensitivity studies
; Southern Hemisphere
; Stress magnitude
; Surface temperature anomalies
; Twentieth century
; Zonal wind
; Atmospheric temperature
; Climatology
; Sea ice
; Climate models
; climate change
; climate modeling
; climate variation
; computer simulation
; El Nino-Southern Oscillation
; heat transfer
; historical record
; Northern Hemisphere
; sea ice
; sea surface temperature
; Southern Hemisphere
; twentieth century
; zonal wind
; Arctic
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| 英文摘要: | The low-resolution version of the Community Climate System Model, version 4 (CCSM4) is a computationally efficient alternative to the intermediate and standard resolution versions of this fully coupled climate system model. It employs an atmospheric horizontal grid of 3.75 × 3.75 and 26 levels in the vertical with a spectral dynamical core (T31) and an oceanic horizontal grid that consists of a nominal 3 resolution with 60 levels in the vertical. This low-resolution version (T31x3) can be used for a variety of applications including long equilibrium simulations, development work, and sensitivity studies. The T31x3 model is validated for modern conditions by comparing to available observations. Significant problems exist for Northern Hemisphere Arctic locales where sea ice extent and thickness are excessive. This is partially due to low heat transport in T31x3, which translates into a globally averaged sea surface temperature (SST) bias of -1.54 C compared to observational estimates from the 1870-99 historical record and a bias of 21.26 C compared to observations from the 1986-2005 historical record. Maximum zonal wind stress magnitude in the Southern Hemisphere matches observational estimates over the ocean, although its placement is incorrectly displaced equatorward. Aspects of climate variability in T31x3 compare to observed variability, especially so for ENSO where the amplitude and period approximate observations. T31x3 surface temperature anomaly trends for the twentieth century also follow observations. An examination of the T31x3 model relative to the intermediate CCSM4 resolution (finite volume dynamical core 1.9 × 2.5) for preindustrial conditions shows the T31x3 model approximates this solution for climate state and variability metrics examined here. © 2012 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/52377
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| 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
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| Recommended Citation: | |
Shields C.A.,Bailey D.A.,Danabasoglu G.,et al. The low-resolution CCSM4[J]. Journal of Climate,2012-01-01,25(12)
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