DOI: 10.1002/joc.5860
Scopus记录号: 2-s2.0-85055675421
论文题名: The Antarctic circumpolar wave and its seasonality: Intrinsic travelling modes and El Niño–Southern Oscillation teleconnections
作者: Wang X. ; Giannakis D. ; Slawinska J.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 2 起始页码: 1026
结束页码: 1040
语种: 英语
英文关键词: Antarctic circumpolar wave
; ENSO teleconnections
; seasonal cycle
; spatio-temporal patterns
; time series analysis
Scopus关键词: Atmospheric pressure
; Climatology
; Dynamical systems
; Nonlinear dynamical systems
; Sea ice
; Spectrum analysis
; Surface waters
; Time series analysis
; Antarctic circumpolar wave
; Eigendecomposition techniques
; Interannual variability
; Sea ice concentration
; Sea surface temperature (SST)
; Seasonal cycle
; Spatiotemporal patterns
; Teleconnections
; Oceanography
; air-sea interaction
; annual variation
; circumpolar current
; El Nino-Southern Oscillation
; seasonal variation
; seasonality
; spatiotemporal analysis
; teleconnection
; time series analysis
; Indian Ocean
; Southern Ocean
英文摘要: Interannual variability in the Southern Ocean is investigated via nonlinear Laplacian spectral analysis (NLSA), an objective eigendecomposition technique for nonlinear dynamical systems that can simultaneously recover multiple timescales from data with high skill. Applied to modelled and observed sea surface temperature and sea ice concentration data, NLSA recovers the wavenumber-2 eastwards propagating signal corresponding to the Antarctic circumpolar wave (ACW). During certain phases of its lifecycle, the spatial patterns of this mode display a structure that can explain the statistical origin of the Antarctic dipole pattern. Another group of modes have combination frequencies consistent with the modulation of the annual cycle by the ACW. Further examination of these newly identified modes reveals that they can have either eastwards or westwards propagation, combined with meridional pulsation reminiscent of sea ice reemergence patterns. Moreover, they exhibit smaller-scale spatial structures and explain more Indian Ocean variance than the primary ACW modes. We attribute these modes to teleconnections between ACW and the tropical Indo-Pacific Ocean; in particular, fundamental El Niño–Southern Oscillation (ENSO) modes and their associated combination modes with the annual cycle recovered by NLSA. Another mode extracted from the Antarctic variables displays an eastwards propagating wavenumber-3 structure over the Southern Ocean, but exhibits no significant correlation to interannual Indo-Pacific variability. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116559
Appears in Collections: 全球变化的国际研究计划
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作者单位: Center for Atmosphere Ocean Science, Courant Institute of Mathematical Sciences, New York University, New York, NY, United States; Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI, United States
Recommended Citation:
Wang X.,Giannakis D.,Slawinska J.. The Antarctic circumpolar wave and its seasonality: Intrinsic travelling modes and El Niño–Southern Oscillation teleconnections[J]. International Journal of Climatology,2019-01-01,39(2)