The Observed Agulhas Retroflection Behaviors During 1993-2018

doi:10.1029/2021JC017995

IOCAS-IR > 海洋环流与波动重点实验室

	The Observed Agulhas Retroflection Behaviors During 1993-2018
	Zhu, Yanan 1,2,3; Li, Yuanlong 1,2,3,4; Zhang, Zhengguang 3,5; Qiu, Bo 6; Wang, Fan1,2,3
	2021-12-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	126 期号:12 页码:16
通讯作者	Li, Yuanlong(liyuanlong@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
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.
关键词	Southern Indian Ocean Agulhas Current Agulhas Retroflection eddy-mean flow interaction
DOI	10.1029/2021JC017995
收录类别	SCI
语种	英语
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
WOS类目	Oceanography
WOS记录号	WOS:000735870300036
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/177657
专题	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.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 5.Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Phys Oceanog Lab, Qingdao, Peoples R China 6.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA
第一作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
通讯作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
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.

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