DOI: 10.1175/JCLI-D-12-00478.1
Scopus记录号: 2-s2.0-84883278762
论文题名: Two decades of the atlantic meridional overturning circulation: Anatomy, variations, extremes, prediction, and overcoming its limitations
作者: Wunsch C. ; Heimbach P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 18 起始页码: 7167
结束页码: 7186
语种: 英语
Scopus关键词: Atlantic meridional overturning circulations
; Central Limit Theorem
; Deep western boundary currents
; Gaussian stochastic process
; Internal instability
; Northern latitudes
; Ocean circulation
; Statistical significance
; Random processes
; Ocean currents
; air-sea interaction
; buoyancy forcing
; climatology
; Gaussian method
; meridional circulation
; overturn
; prediction
; stochasticity
; three-dimensional modeling
; trend analysis
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf Stream
英文摘要: The zonally integrated meridional volume transport in the North Atlantic [Atlantic meridional overturning circulation (AMOC)] is described in a 19-yr-long ocean-state estimate, one consistent with a diverse global dataset. Apart from a weak increasing trend at high northern latitudes, theAMOCappears statistically stable over the last 19 yr with fluctuations indistinguishable from those of a stationary Gaussian stochastic process. This characterization makes it possible to study (using highly developed tools) extreme values, predictability, and the statistical significance of apparent trends. Gaussian behavior is consistent with the central limit theorem for a process arising from numerous independent disturbances. In this case, generators include internal instabilities, changes in wind and buoyancy forcing fields, boundary waves, the Gulf Stream and deep western boundary current transports, the interior fraction in Sverdrup balance, and all similar phenomena arriving as summation effects from long distances and times. As a zonal integral through the sum of the large variety of physical processes in the three-dimensional ocean circulation, understanding of the AMOC, if it is of central climate importance, requires breaking it down into its unintegrated components over the entire basin. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51679
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Wunsch C.,Heimbach P.. Two decades of the atlantic meridional overturning circulation: Anatomy, variations, extremes, prediction, and overcoming its limitations[J]. Journal of Climate,2013-01-01,26(18)