DOI: 10.1175/JCLI-D-13-00316.1
Scopus记录号: 2-s2.0-84903384918
论文题名: Low-frequency SST and upper-ocean heat content variability in the North Atlantic
作者: Buckley M.W. ; Ponte R.M. ; Forget G. ; Heimbach P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 13 起始页码: 4996
结束页码: 5018
语种: 英语
Scopus关键词: Ocean currents
; Content variability
; Gulf Stream region
; Interannual time scale
; Interannual variability
; Low frequency variability
; Mixed layer depths
; North Atlantic Ocean
; Sea surface temperature (SST)
; Climate change
; air-sea interaction
; atmospheric forcing
; heat budget
; heat flux
; mixed layer
; sea surface temperature
; upper ocean
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf Stream
英文摘要: A recent state estimate covering the period 1992-2010 from the Estimating the Circulation and Climate of the Ocean (ECCO) project is utilized to quantify the upper-ocean heat budget in the North Atlantic on monthly to interannual time scales (seasonal cycle removed). Three novel techniques are introduced: 1) the heat budget is integrated over the maximum climatological mixed layer depth (integral denoted as H), which gives results that are relevant for explaining SST while avoiding strong contributions from vertical diffusion and entrainment; 2) advective convergences are separated into Ekman and geostrophic parts, a technique that is successful away from ocean boundaries; and 3) air-sea heat fluxes and Ekman advection are combined into one local forcing term. The central results of our analysis are as follows: 1) In the interior of subtropical gyre, local forcing explains the majority of H variance on all time scales resolved by the ECCO estimate. 2) In the Gulf Stream region, low-frequency H anomalies are forced by geostrophic convergences and damped by air-sea heat fluxes. 3) In the interior of the subpolar gyre, diffusion and bolus transports play a leading order role in H variability, and these transports are correlated with low-frequency variability in wintertime mixed layer depths. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51385
Appears in Collections: 气候变化事实与影响
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作者单位: Atmospheric and Environmental Research, Lexington, United States; Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Buckley M.W.,Ponte R.M.,Forget G.,et al. Low-frequency SST and upper-ocean heat content variability in the North Atlantic[J]. Journal of Climate,2014-01-01,27(13)