DOI: 10.1175/JCLI-D-16-0751.1
Scopus记录号: 2-s2.0-85027253948
论文题名: Simultaneous evolution of gyre and Atlantic meridional overturning circulation anomalies as an eigenmode of the North Atlantic system
作者: Zhao B. ; Reichler T. ; Strong C. ; Penland C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 17 起始页码: 6737
结束页码: 6755
语种: 英语
Scopus关键词: Advection
; Atmospheric pressure
; Atmospheric thermodynamics
; Inverse problems
; Stochastic models
; Stochastic systems
; Surface waters
; Atlantic meridional overturning circulations
; Atmosphere-ocean interactions
; Atmosphere-ocean system
; General circulation model
; Inverse methods
; Meridional overturning circulations
; North Atlantic oscillations
; Sea surface temperature (SST)
; Oceanography
英文摘要: The authors identify an interdecadal oscillatory mode of the North Atlantic atmosphere-ocean system in a general circulation model (GFDL CM2.1) via a linear inverse model (LIM). The oscillation mechanism is mostly embedded in the subpolar gyre: anomalous advection generates density anomalies in the eastern subpolar gyre, which propagate along the mean gyre circulation and reach the subpolar gyre center around 10 years later, when associated anomalous advection of the opposite sign starts the other half cycle. As density anomalies reach the Labrador Sea deep convection region, Atlantic meridional overturning circulation (AMOC) anomalies are also induced. Both the gyre and AMOC anomalies then propagate equatorward slowly, following the advection of density anomalies. The oscillation is further demonstrated to be more likely an ocean-only mode while excited by the atmospheric forcing; in particular, it can be approximated as a linearly driven damped oscillator that is partly excited by the North Atlantic Oscillation (NAO). The slowly evolving interdecadal oscillation significantly improves and prolongs the LIM's prediction skill of sea surface temperature (SST) evolution. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49766
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Science, University of Utah, Salt Lake City, UT, United States; NOAA/Earth System Research Laboratory, Physical Sciences Division, Boulder, CO, United States
Recommended Citation:
Zhao B.,Reichler T.,Strong C.,et al. Simultaneous evolution of gyre and Atlantic meridional overturning circulation anomalies as an eigenmode of the North Atlantic system[J]. Journal of Climate,2017-01-01,30(17)