DOI: 10.1002/2015GL064596
论文题名: On the evolution of Atlantic Meridional Overturning Circulation Fingerprint and implications for decadal predictability in the North Atlantic
作者: Zhang J. ; Zhang R.
刊名: Geophysical Research Letters
ISSN: 0094-9113
EISSN: 1944-8844
出版年: 2015
卷: 42, 期: 13 起始页码: 5419
结束页码: 5426
语种: 英语
英文关键词: AMOC fingerprint
; decadal predictability
; meridional heat transport
Scopus关键词: Heat transfer
; Ocean currents
; AMOC fingerprint
; Atlantic meridional overturning circulations
; Convergence/divergence
; Decadal predictability
; Decadal predictions
; Geophysical fluid dynamics laboratories
; Meridional heat transports
; North atlantic deep water formations
; Oceanography
; advection
; gyre
; heat transfer
; meridional circulation
; overturn
; prediction
; upper ocean
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf Stream
英文摘要: It has been suggested previously that the Atlantic Meridional Overturning Circulation (AMOC) anomaly associated with changes in the North Atlantic Deep Water formation propagates southward with an advection speed north of 34°N. In this study, using Geophysical Fluid Dynamics Laboratory Coupled Model version 2.1 (GFDL CM2.1), we show that this slow southward propagation of the AMOC anomaly is crucial for the evolution and the enhanced decadal predictability of the AMOC fingerprint - the leading mode of upper ocean heat content (UOHC) in the extratropical North Atlantic. A positive AMOC anomaly in northern high latitudes leads to a convergence/divergence of the Atlantic meridional heat transport (MHT) anomaly in the subpolar/Gulf Stream region, thus warming in the subpolar gyre (SPG) and cooling in the Gulf Stream region after several years. Recent decadal prediction studies successfully predicted the observed warm shift in the SPG in the mid-1990s. Our results here provide the physical mechanism for the enhanced decadal prediction skills in the SPG UOHC. Key Points Slow advection of AMOC anomaly leads to the AMOC fingerprint north of 34°N Slow advection of AMOC anomaly induces MHT convergence/divergence This study provides the physical mechanism for enhanced decadal predictability. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938215408&doi=10.1002%2f2015GL064596&partnerID=40&md5=3707bb77e4dc5a352c3e670258cb5265
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8729
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: Applied Physics Laboratory, University of Washington, Seattle, WA, United States
Recommended Citation:
Zhang J.,Zhang R.. On the evolution of Atlantic Meridional Overturning Circulation Fingerprint and implications for decadal predictability in the North Atlantic[J]. Geophysical Research Letters,2015-01-01,42(13).