DOI: 10.1007/s00382-011-1035-z
Scopus记录号: 2-s2.0-84856322783
论文题名: AMOC variations in 1979-2008 simulated by NCEP operational ocean data assimilation system
作者: Huang B. ; Xue Y. ; Kumar A. ; Behringer D.W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-03-04 起始页码: 513
结束页码: 525
语种: 英语
英文关键词: AMOC
; Atlantic meridional overturning circulation
; Global ocean data assimilation system
; GODAS
; NAO
; National centers for environmental prediction
; NCEP
; North Atlantic oscillation
英文摘要: Variations in the Atlantic meridional overturning circulation (AMOC) between 1979 and 2008 are documented using the operational ocean analysis, the Global Ocean Data Assimilation System (GODAS), at the National Centers for Climate Prediction (NCEP). The maximum AMOC at 40°N is about 16 Sv in average with peak-to-peak variability of 3-4 Sv. The AMOC variations are dominated by an upward trend from 1980 to 1995, and a downward trend from 1995 to 2008. The maximum AMOC at 26.5°N is slightly weaker than hydrographic estimates and observations from mooring array. The dominant variability of the AMOC in 20°-65°N (the first EOF, 51% variance) is highly correlated with that in the subsurface temperature (the first EOF, 33% variance), and therefore, with density (the first EOF, 25% variance) in the North Atlantic, and is consistent with the observational estimates based on the World Ocean Database 2005. The dominant variabilities of AMOC and subsurface temperature are also analyzed in the context of possible links with the net surface heat flux, deep convection, western boundary current, and subpolar gyre. Variation in the net surface heat flux is further linked to the North Atlantic Oscillation (NAO) index which is found to lead AMOC variations by about 5 years. Our results indicate that AMOC variations can be documented based on an ocean analysis system such as GODAS. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55374
Appears in Collections: 过去全球变化的重建
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作者单位: Climate Prediction Center, NOAA, Camp Springs, MD, United States; Environmental Modeling Center, NOAA, Camp Springs, MD, United States; National Climate Data Center, Asheville, NC 28801, United States
Recommended Citation:
Huang B.,Xue Y.,Kumar A.,et al. AMOC variations in 1979-2008 simulated by NCEP operational ocean data assimilation system[J]. Climate Dynamics,2012-01-01,38(2017-03-04)