DOI: 10.1002/2016GL070255
论文题名: On the role of extratropical air-sea interaction in the persistence of the Southern Annular Mode
作者: Xiao B. ; Zhang Y. ; Yang X.-Q. ; Nie Y.
刊名: Geophysical Research Letters
ISSN: 0094-8715
EISSN: 1944-8446
出版年: 2016
卷: 43, 期: 16 起始页码: 8806
结束页码: 8814
语种: 英语
英文关键词: eddy-mean flow interaction
; extratropical air-sea interaction
; Southern Annular Mode
Scopus关键词: Atmospheric temperature
; Heat flux
; Spectrum analysis
; Surface waters
; Air sea interactions
; Eddy-mean flow interaction
; Finite amplitude waves
; Interseasonal variabilities
; Sea surface temperature anomalies
; Southern Annular Mode
; Surface heat fluxes
; Tropospheric temperature
; Oceanography
英文摘要: Using the daily atmosphere and ocean reanalysis data, this study highlights the role of extratropical air-sea interaction in the variability of the Southern Annular Mode (SAM). Our analysis shows that the SAM-induced meridional dipolar sea surface temperature (SST) anomalies, through surface heat fluxes, can maintain persistent lower tropospheric temperature anomalies, which further results in anomalous eddy momentum forcing enhancing the persistence of the SAM. With the Finite Amplitude Wave Activity diagnosis, we illustrate that response of the eddy momentum forcing to SST anomalies can be attributed to changes in both baroclinic processes as baroclinic eddy generation and barotropic processes as wave breaking thus resultant diffusive eddy mixing, with the former confined at high latitudes and the latter strongest at midlatitudes. Spectral analysis further suggests that the above air-sea interactions are important for bimonthly and longer time scale SAM variations. The dipolar SST pattern may be an indicator for predicting subseasonal and interseasonal variabilities of the SAM. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983732439&doi=10.1002%2f2016GL070255&partnerID=40&md5=ee0079404670d062e08d916789cc32a3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9678
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: CMA-NJU Joint Laboratory for Climate Prediction Studies, School of Atmospheric Sciences, Nanjing University, Nanjing, China
Recommended Citation:
Xiao B.,Zhang Y.,Yang X.-Q.,et al. On the role of extratropical air-sea interaction in the persistence of the Southern Annular Mode[J]. Geophysical Research Letters,2016-01-01,43(16).