DOI: 10.1175/JCLI-D-16-0617.1
Scopus记录号: 2-s2.0-85040953450
论文题名: Comparison of mechanisms for low-frequency variability of summer Arctic sea ice in three coupled models
作者: Li D. ; Zhang R. ; Knutson T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 3 起始页码: 1205
结束页码: 1226
语种: 英语
英文关键词: Arctic
; Climate change
; Coupled models
; Model comparison
; Multidecadal variability
; Sea ice
Scopus关键词: Atmospheric movements
; Climate change
; Climate models
; Feedback
; Heat transfer
; Ice control
; Sea ice
; Arctic
; Atmospheric heat
; Control simulation
; Coupled models
; Low frequency variability
; Model comparison
; Multidecadal variability
; Surface warming
; Ice
; climate change
; decadal variation
; heat transfer
; ice thickness
; numerical model
; sea ice
; summer
; warming
; Arctic Ocean
; Atlantic Ocean
; Pacific Ocean
英文摘要: In this study the mechanisms for low-frequency variability of summer Arctic sea ice are analyzed using long control simulations from three coupled models (GFDL CM2.1, GFDL CM3, and NCAR CESM). Despite different Arctic sea ice mean states, there are many robust features in the response of low-frequency summer Arctic sea ice variability to the three key predictors (Atlantic and Pacific oceanic heat transport into the Arctic and the Arctic dipole) across all three models. In all three models, an enhanced Atlantic (Pacific) heat transport into the Arctic induces summer Arctic sea ice decline and surface warming, especially over the Atlantic (Pacific) sector of the Arctic. A positive phase of the Arctic dipole induces summer Arctic sea ice decline and surface warming on the Pacific side, and opposite changes on the Atlantic side. There is robust Bjerknes compensation at low frequency, so the northward atmospheric heat transport provides a negative feedback to summer Arctic sea ice variations. The influence of the Arctic dipole on summer Arctic sea ice extent is more (less) effective in simulations with less (excessive) climatological summer sea ice in the Atlantic sector. The response of Arctic sea ice thickness to the three key predictors is stronger in models that have thicker climatological Arctic sea ice. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111682
Appears in Collections: 气候减缓与适应
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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Li D.,Zhang R.,Knutson T.. Comparison of mechanisms for low-frequency variability of summer Arctic sea ice in three coupled models[J]. Journal of Climate,2018-01-01,31(3)