DOI: 10.1175/JCLI-D-12-00801.1
Scopus记录号: 2-s2.0-84907828133
论文题名: Energetics of multidecadal Atlantic Ocean variability
作者: Dijkstra H.A. ; Saenz J.A. ; Hogg A.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 20 起始页码: 7874
结束页码: 7889
语种: 英语
Scopus关键词: Atlantic Ocean
; air-sea interaction
; climate variation
; decadal variation
; energetics
; kinetic energy
; meridional circulation
; modeling
; overturn
; potential energy
; Rossby wave
; temperature anomaly
; turbulence
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Oscillatory behavior of the Atlantic meridional overturning circulation (MOC) is thought to underlie Atlantic multidecadal climate variability. While the energy sources and sinks driving the mean MOC have received intense scrutiny over the last decade, the governing energetics of the modes of variability of the MOC have not been addressed to the same degree. This paper examines the energy conversion processes associated with this variability in an idealized North Atlantic Ocean model. In this model, the multidecadal variability arises through an instability associated with a so-called thermal Rossby mode, which involves westward propagation of temperature anomalies. Applying the available potential energy (APE) framework from stratified turbulence to the idealized ocean model simulations, the authors study the multidecadal variability from an energetics viewpoint. The analysis explains how the propagation of the temperature anomalies leads to changes in APE, which are subsequently converted into the kinetic energy changes associated with variations in the MOC. Thus, changes in the rate of generation of APE by surface buoyancy forcing provide the kinetic energy to sustain the multidecadal mode of variability. © 2014 American Meteorological Society. 资助项目: ARC, Australian Research Council
; ARC, Australian Research Council
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51403
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Institute for Marine and Atmospheric Research Utrecht, Department of Physics and Astronomy, Utrecht University, Utrecht, Netherlands; Research School of Earth Sciences, The Australian National University, Canberra, ACT, Australia; Research School of Earth Sciences and ARC Centre of Excellence for Climate System Science, The Australian National University, Canberra, ACT, Australia; Climate, Ocean and Sea Ice Modeling, Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Dijkstra H.A.,Saenz J.A.,Hogg A.M.. Energetics of multidecadal Atlantic Ocean variability[J]. Journal of Climate,2014-01-01,27(20)