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The Observed Agulhas Retroflection Behaviors During 1993-2018

文献类型：期刊论文

作者Zhu, Yanan1,3,5; Li, Yuanlong1,3,4,5; Zhang, Zhengguang1,6; Qiu, Bo2; Wang, Fan1,3,5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
出版日期2021-12-01
卷号126期号:12页码:16
关键词Southern Indian Ocean Agulhas Current Agulhas Retroflection eddy-mean flow interaction
ISSN号2169-9275
DOI10.1029/2021JC017995
通讯作者Li, Yuanlong(liyuanlong@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
英文摘要Near the southern tip of the African continent, the Agulhas Current retroflects eastward to feed the Agulhas Return Current, giving rise to the Agulhas Retroflection (AR). The AR is dynamically unstable and radiates eddies and rings that constitute a portion of the Agulhas leakage. In this study, by analyzing 26 years (1993-2018) of updated satellite altimetry data, the spatial and temporal characteristic of the surface AR point are revisited. By adopting a refined identification algorithm of the AR point, we show that the AR longitude (X-AR) fluctuates widely between 7 degrees and 27 degrees E on timescales ranging from days to months, without a stable seasonal cycle. The X-AR variability also shows evident temporal asymmetry with shorter residence time at western positions. The retreat of the AR from the western to eastern positions tends to be swift, with 46% of the events completed in one day. In comparison, the intrusion from the eastern to western positions is much slower, with 32% of the events taking more than one month. The energy transfer from the mean flow to mesoscale eddies is likely the primary regime underlying the AR variability. Further analysis suggests that the AR variability causes sea surface temperature anomalies of similar to 0.5 degrees C through anomalous advection and thereby gives rise to turbulent heat flux anomalies of similar to 10 W m(-2), exerting potential impacts on the local climate.
资助项目National Key R&D Program of China[2019YFA0606702] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42010403] ; National Natural Science Foundation of China[42022041] ; National Natural Science Foundation of China[41876001] ; National Natural Science Foundation of China[42176008] ; National Natural Science Foundation of China[42176034] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; Key Deployment Project of CAS Centre for Ocean Mega-Science[COMS2019Q07]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:000735870300036
出版者AMER GEOPHYSICAL UNION
源URL[http://ir.qdio.ac.cn/handle/337002/177656]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Li, Yuanlong; Wang, Fan
作者单位1.Pilot Natl Lab Marine Sci & Technol Qingdao, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China
2.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
6.Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Phys Oceanog Lab, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Yanan,Li, Yuanlong,Zhang, Zhengguang,et al. The Observed Agulhas Retroflection Behaviors During 1993-2018[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2021,126(12):16.
APA Zhu, Yanan,Li, Yuanlong,Zhang, Zhengguang,Qiu, Bo,&Wang, Fan.(2021).The Observed Agulhas Retroflection Behaviors During 1993-2018.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,126(12),16.
MLA Zhu, Yanan,et al."The Observed Agulhas Retroflection Behaviors During 1993-2018".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 126.12(2021):16.

入库方式： OAI收割

来源：海洋研究所

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