DOI: 10.1175/JCLI-D-16-0370.1
Scopus记录号: 2-s2.0-85015972201
论文题名: Interannual variability in the North Atlantic Ocean's temperature field and its association with the wind stress forcing
作者: Groth A. ; Feliks Y. ; Kondrashov D. ; Ghil M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 7 起始页码: 2655
结束页码: 2678
语种: 英语
Scopus关键词: Atmospheric temperature
; Ocean currents
; Orthogonal functions
; Spectrum analysis
; Surface waters
; Temperature
; Wind stress
; Empirical Orthogonal Function
; Gyres
; Interannual variability
; North Atlantic Ocean
; Oceanic variabilities
; Spectral analysis/models/distribution
; Oceanography
; air-sea interaction
; annual variation
; atmospheric forcing
; empirical orthogonal function analysis
; gyre
; sea surface temperature
; spectral analysis
; wind forcing
; wind stress
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Spectral analyses of the North Atlantic temperature field in the Simple Ocean Data Analysis (SODA) reanalysis identify prominent and statistically significant interannual oscillations along the Gulf Stream front and in large regions of the North Atlantic. A 7-8-yr oscillatory mode is characterized by a basinwide southwest-to-northeast-oriented propagation pattern in the sea surface temperature (SST) field. This pattern is found to be linked to a seesaw in the meridional dipole structure of the zonal wind stress forcing (TAUX). In the subpolar gyre, the SST and TAUX fields of this mode are shown to be in phase opposition, which suggests a cooling effect of the wind stress on the upper ocean layer. Over all, this mode's temperature field is characterized by a strong equivalent-barotropic component, as shown by covariations in SSTs and sea surface heights, and by phase-coherent behavior of temperature layers at depth with the SST field. Recent improvements of multivariate singular spectrum analysis (M-SSA) help separate spatiotemporal patterns. This methodology is developed further and applied to studying the ocean's response to variability in the atmospheric forcing. Statistical evidence is shown to exist for other mechanisms generating oceanic variability of similar 7-8-yr periodicity in the Gulf Stream region; the latter variability is likewise characterized by a strongly equivalent-barotropic component. Two other modes of biennial variability in the Gulf Stream region are also identified, and it is shown that interannual variability in this region cannot be explained by the ocean's response to similar variability in the atmospheric forcing alone. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49760
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; Institute of Geophysics and Planetary Physics, University of California, Los Angeles, Los Angeles, CA, United States; Department of Mathematics, Israel Institute of Biological Research, Ness Ziona, Israel; Geosciences Department and Laboratoire de Météorologie Dynamique (CNRS and IPSL), Ecole Normale Supérieure, Paris, France
Recommended Citation:
Groth A.,Feliks Y.,Kondrashov D.,et al. Interannual variability in the North Atlantic Ocean's temperature field and its association with the wind stress forcing[J]. Journal of Climate,2017-01-01,30(7)