| DOI: | 10.1002/2015GL063931
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| 论文题名: | Quantitative characterization of spurious numerical oscillations in 48 CMIP5 models |
| 作者: | Geil K.L.; Zeng X.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8642
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| EISSN: | 1944-8373
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| 出版年: | 2015
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| 卷: | 42, 期:12 | | 起始页码: | 5066
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| 结束页码: | 5073
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| 语种: | 英语
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| 英文关键词: | global climate models
; model evaluation
; numerical approximation
; uncertainty quantification
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| Scopus关键词: | Numerical models
; Coupled Model Intercomparison Project
; Global climate model
; Interannual variability
; Model evaluation
; Numerical approximations
; Oscillation reductions
; Quantitative characterization
; Uncertainty quantifications
; Climate models
; climate modeling
; climate oscillation
; discontinuity
; global climate
; model validation
; numerical model
; quantitative analysis
; spatial analysis
; uncertainty analysis
; Andes
; Pacific Ocean
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| 英文摘要: | Spurious numerical oscillations (SNOs) (e.g., Gibbs oscillations) can appear as unrealistic spatial waves near discontinuities or sharp gradients in global model fields (e.g., orography) and have been a known problem in global models for decades. Multiple methods of oscillation reduction exist; consequently, the oscillations are presumed small in modern climate models and hence are rarely addressed in recent literature. Here we use two metrics to quantify SNOs in 13 variables from 48 Coupled Model Intercomparison Project Phase 5 models along a Pacific ocean transect near the Andes. Results show that 48% of nonspectral models and 95% of spectral models have at least one variable with SNO amplitude as large as, or greater than, atmospheric interannual variability. The impact of SNOs on climate simulations should be thoroughly evaluated and further efforts to substantially reduce SNOs in climate models are urgently needed. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948717347&doi=10.1002%2f2015GL063931&partnerID=40&md5=81104691bb11dd1b6cced11d88e636fe
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| Citation statistics: |
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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/8258
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
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| Recommended Citation: | |
Geil K.L.,Zeng X.. Quantitative characterization of spurious numerical oscillations in 48 CMIP5 models[J]. Geophysical Research Letters,2015-01-01,42(12).
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