DOI: 10.1175/JCLI-D-17-0193.1
Scopus记录号: 2-s2.0-85040630316
论文题名: Low-frequency North Atlantic climate variability in the community earth system model large ensemble
作者: Kim W.M. ; Yeager S. ; Chang P. ; Danabasoglu G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 2 起始页码: 787
结束页码: 813
语种: 英语
英文关键词: Climate variability
; Meridional overturning circulation
; Multidecadal variability
; North Atlantic Ocean
; North Atlantic Oscillation
Scopus关键词: Atmospheric pressure
; Boundary conditions
; Climate models
; Climatology
; Earth (planet)
; Earth atmosphere
; Surface waters
; Climate variability
; Meridional overturning circulations
; Multidecadal variability
; North Atlantic Ocean
; North Atlantic oscillations
; Oceanography
; air-sea interaction
; atmospheric modeling
; climate variation
; decadal variation
; ensemble forecasting
; meridional circulation
; North Atlantic Oscillation
; overturn
; sea surface temperature
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: There is observational and modeling evidence that low-frequency variability in the North Atlantic has significant implications for the global climate, particularly for the climate of the Northern Hemisphere. This study explores the representation of low-frequency variability in the Atlantic region in historical large ensemble and preindustrial control simulations performed with the Community Earth System Model (CESM). Compared to available observational estimates, it is found that the simulated variability in Atlantic meridional overturning circulation (AMOC), North Atlantic sea surface temperature (NASST), and Sahel rainfall is underestimated on multidecadal time scales but comparable on interannual to decadal time scales. The weak multidecadal North Atlantic variability appears to be closely related to weaker-than-observed multidecadal variations in the simulated North Atlantic Oscillation (NAO), as the AMOC and consequent NASST variability is impacted, to a great degree, by the NAO. Possible reasons for this weak multidecadal NAO variability are explored with reference to solutions from two atmosphere-only simulations with different lower boundary conditions and vertical resolution. Both simulations consistently reveal weaker-than-observed multidecadal NAO variability despite more realistic boundary conditions and better resolved dynamics than coupled simulations. The authors thus conjecture that the weak multidecadal NAO variability in CESM is likely due to deficiencies in air-sea coupling, resulting from shortcomings in the atmospheric model or coupling details. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111738
Appears in Collections: 气候减缓与适应
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作者单位: National Center for Atmospheric Research, Boulder, CO, United States; Department of Oceanography, Texas A and M University, College Station, TX, United States; Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao, China
Recommended Citation:
Kim W.M.,Yeager S.,Chang P.,et al. Low-frequency North Atlantic climate variability in the community earth system model large ensemble[J]. Journal of Climate,2018-01-01,31(2)