DOI: 10.1175/JCLI-D-11-00367.1
Scopus记录号: 2-s2.0-84865787459
论文题名: Seasonal relationships between large-scale climate variability and antarctic sea ice concentration
作者: Simpkins G.R. ; Ciasto L.M. ; Thompson D.W.J. ; England M.H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 16 起始页码: 5451
结束页码: 5469
语种: 英语
Scopus关键词: Annular mode
; Antarctic oscillation
; Antarctica
; Atmosphere-ocean interactions
; ENSO
; Atmospheric pressure
; Climatology
; Financial data processing
; Nickel compounds
; Principal component analysis
; Sea ice
; air-sea interaction
; Antarctic Oscillation
; climate variation
; El Nino-Southern Oscillation
; sea ice
; seasonality
; Southern Hemisphere
; Antarctica
英文摘要: The observed relationships between anomalous Antarctic sea ice concentration (SIC) and the leading patterns of Southern Hemisphere (SH) large-scale climate variability are examined as a function of season over 1980-2008. Particular emphasis is placed on 1) the interactions between SIC, the southern annular mode (SAM), and El Nin{ogonek} o-Southern Oscillation (ENSO); and 2) the contribution of these two leading modes to the 29-yr trends in sea ice. Regression, composite, and principal component analyses highlight a seasonality in SH sea ice-atmosphere interactions, whereby Antarctic sea ice variability exhibits the strongest linkages to the SAM and ENSO during the austral cold season months. As noted in previous work, a dipole in SIC anomalies emerges in relation to the SAM, characterized by centers of action located near the Bellingshausen/Weddell and Amundsen/eastern Ross Seas. The structure and magnitude of this SIC dipole is found to vary considerably as a function of season, consistent with the seasonality of the overlying atmospheric circulation anomalies. Relative to the SAM, the pattern of sea ice anomalies linked to ENSO exhibits a similar seasonality but tends to be weaker in amplitude and more diffuse in structure. The relationships between ENSO and sea ice also exhibit a substantial nonlinear component, highlighting the need to consider both season and phase of the ENSO cycle when diagnosing ENSO-SIC linkages. Trends in SIC over 1980-2008 are not significantly related to trends in either theSAMor ENSO during any season, including austral summer when the trend in the SAM is most pronounced. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52282
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Simpkins G.R.,Ciasto L.M.,Thompson D.W.J.,et al. Seasonal relationships between large-scale climate variability and antarctic sea ice concentration[J]. Journal of Climate,2012-01-01,25(16)