globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-11-00309.1
Scopus记录号: 2-s2.0-84867681473
论文题名:
Standing and transient eddies in the response of the Southern Ocean meridional overturning to the Southern annular mode
作者: Dufour C.O.; Sommer J.L.; Zika J.D.; Gehlen M.; Orr J.C.; Mathiot P.; Barnier B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期:20
起始页码: 6958
结束页码: 6974
语种: 英语
Scopus关键词: Antarctic circumpolar current ; Antarctic oscillation ; Eddies ; Eddy fluxes ; Eddy-permitting resolution ; Forcings ; Interannual ; Meridional overturning circulations ; Meridional transport ; Overturning circulation ; Southern Annular Mode ; Southern ocean ; Spatial patterns ; Wind anomalies ; Wind events ; Dynamic response ; Ocean currents ; Wind ; annual variation ; Antarctic Oscillation ; circumpolar current ; eddy ; meridional circulation ; overturn ; spatial analysis ; Southern Ocean
英文摘要: To refine the understanding of how the Southern Ocean responds to recent intensification of the southern annularmode (SAM), a regional oceanmodel at two eddy-permitting resolutions was forced with two synthetic interannual forcings. The first forcing corresponds to homogeneously intensified winds, while the second concerns their poleward intensification, consistent with positive phases of the SAM. Resulting wind-driven responses differ greatly between the nearly insensitive Antarctic Circumpolar Current (ACC) and the more sensitivemeridional overturning circulation (MOC).As expected, eddiesmitigate the response of theACC and MOC to poleward-intensified winds. However, transient eddies do not necessarily play an increasing role in meridional transport with increasing resolution. As winds and resolution increase, meridional transport from standing eddies becomes more efficient at balancing wind-enhanced overturning. These results question the current paradigms on the role of eddies and present new challenges for eddy flux parameterization. Results also indicate that spatial patterns of wind anomalies are at least as important as the overall change in intensity in influencing the Southern Ocean's dynamic response to wind events. Poleward-intensified wind anomalies from the positive trend in the SAMare farmore efficient in accelerating the ACCthan homogeneouswind anomalies. © 2012 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52179
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作者单位: Laboratoire des Ecoulements Géophysiques et Industriels, CNRS/Université de Grenoble, Grenoble, and Laboratoire des Sciences du Climat et l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Laboratoire des Ecoulements Géophysiques et Industriels, CNRS/Université de Grenoble, Grenoble, France; Laboratoire des Sciences du Climat et l'Environnement/IPSL, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Georges Lemaître Center for Earth and Climate Research, Earth and Life Institute, Louvain-la-Neuve, Belgium; Laboratoire des Ecoulements Géophysiques et Industriels, CNRS/Université de Grenoble, Grenoble, France

Recommended Citation:
Dufour C.O.,Sommer J.L.,Zika J.D.,et al. Standing and transient eddies in the response of the Southern Ocean meridional overturning to the Southern annular mode[J]. Journal of Climate,2012-01-01,25(20)
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