DOI: 10.1002/2014MS000415
Scopus记录号: 2-s2.0-85027932303
论文题名: Processes and mechanisms for the model SST biases in the North Atlantic and North Pacific: A link with the Atlantic meridional overturning circulation
作者: Zhang L ; , Zhao C
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 2 起始页码: 739
结束页码: 758
语种: 英语
英文关键词: Catchments
; Climate models
; Heat flux
; Tropics
; AMOC
; Atlantic meridional overturning circulations
; Model simulation
; Northern hemisphere annular modes
; Ocean-atmosphere models
; SST bias
; Surface heat fluxes
; Teleconnection patterns
; Oceanography
; advection
; atmosphere-ocean coupling
; climate modeling
; cooling
; Ekman layer
; heat flux
; meridional circulation
; Northern Hemisphere
; overturn
; sea surface temperature
; teleconnection
; warming
; wind-driven current
; Aleutian Basin
; Atlantic Ocean
; Atlantic Ocean (North)
; Bering Sea
; Oyashio Current
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Almost all of CMIP5 climate models show cold SST biases in the extratropical North Atlantic (ENA) and tropical North Atlantic (TNA) as well as in the North Pacific which are commonly linked with the weak simulated Atlantic meridional overturning circulation (AMOC). A weak AMOC and its associated reduced northward oceanic heat transport are associated with a cooling of the ENA Ocean, whereas the TNA cooling is attributable to both weak AMOC and surface heat flux. The cold biases in the ENA and TNA have remote impacts on the SST bias in the North Pacific. Here we use coupled ocean-atmosphere model experiments to show the mechanisms and pathways by which the ENA and TNA affect the North Pacific. The model simulations demonstrate that the cooling SST bias in the North Pacific is largely due to the remote effect of the cooling SST bias in the ENA, while the remote impact of the TNA cooling SST bias is of secondary importance. The ENA cooling bias triggers the circumglobal teleconnection via the Northern Hemisphere annular mode, producing a strengthening of the Aleutian low, an enhancement of the southward Ekman and Oyashio cold advection, and thus a cooling SST in the North Pacific. In contrast, the TNA cooling produces a surface high extending to the eastern tropical North Pacific, inducing the northeasterly wind anomalies north, northerly cross-equatorial wind anomalies, and northwesterly wind anomalies south of the equator. This C-shape wind anomaly pattern generates an SST warming in the tropical southeastern Pacific, which eventually leads to an SST warming in the tropical central and western Pacific by the wind-evaporation-SST feedback. The tropical Pacific warming in turn leads to an SST cooling in the North Pacific by the Pacific North American teleconnection pattern. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76056
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, United States; NOAA Geophysical Fluids Dynamics Laboratory, Princeton, Jersey, United States; Physical Oceanography Laboratory, Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China, Qingdao, China
Recommended Citation:
Zhang L,, Zhao C. Processes and mechanisms for the model SST biases in the North Atlantic and North Pacific: A link with the Atlantic meridional overturning circulation[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)