DOI: 10.1175/JCLI-D-15-0403.1
Scopus记录号: 2-s2.0-84962308730
论文题名: A linkage observed between austral autumn Antarctic oscillation and preceding Southern Ocean SST anomalies
作者: Hu C. ; Wu Q. ; Yang S. ; Yao Y. ; Chan D. ; Li Z. ; Deng K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 6 起始页码: 2109
结束页码: 2122
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Climatology
; Heat flux
; Meteorology
; Regression analysis
; Surface waters
; Anomalies
; Antarctic oscillation
; Climate variability
; Interannual variability
; Variability
; Oceanography
; air-sea interaction
; annual variation
; Antarctic Oscillation
; atmospheric circulation
; climate variation
; covariance analysis
; sea surface temperature
; Southern Hemisphere
; temperature anomaly
; Southern Ocean
英文摘要: In this study, the authors apply a lagged maximum covariance analysis (MCA) to capture the cross-seasonal coupled patterns between the Southern Ocean sea surface temperature (SOSST) and extratropical 500-hPa geopotential height anomalies in the Southern Hemisphere, from which Niño-3.4 signals and their linear trends are removed to a certain extent. Statistically significant results show that the dominant feature of ocean-atmosphere interaction is likely the effect of atmosphere on SOSST anomalies, with a peak occurring when the atmosphere leads the SOSST by 1 month. However, the most eye-capturing phenomenon is that the austral autumn atmospheric signal, characterized by a negatively polarized Antarctic Oscillation (AAO), is significantly related to the gradual evolution of preceding SOSST anomalies, suggesting that the SOSST anomalies tend to exert an effect on the Southern Hemisphere atmospheric circulation. A regression analysis based on SOSST anomaly centers confirms these features. It is also demonstrated that the gradual evolution of changes in SOSST is mainly driven by internal atmospheric variability via surface turbulent heat flux associated with cold or warm advection and that the atmospheric circulation experiences a change from a typical positive AAO to a negative phase in this process. These findings indicate that such a long lead cross-seasonal covariance could contribute to a successful prediction of AAO-related atmospheric circulation in austral autumn from the perspective of SOSST anomalies, with lead times up to 6-7 months. © 2016 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50013
Appears in Collections: 气候变化事实与影响
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作者单位: School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China; Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou, Guangdong, China; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong, China
Recommended Citation:
Hu C.,Wu Q.,Yang S.,et al. A linkage observed between austral autumn Antarctic oscillation and preceding Southern Ocean SST anomalies[J]. Journal of Climate,2016-01-01,29(6)