Variability of Heat Content and Eddy Kinetic Energy in the Southeast Indian Ocean: Roles of the Indonesian Throughflow and Local Wind Forcing

doi:10.1175/JPO-D-22-0051.1

IOCAS-IR > 海洋环流与波动重点实验室

	Variability of Heat Content and Eddy Kinetic Energy in the Southeast Indian Ocean: Roles of the Indonesian Throughflow and Local Wind Forcing
	Li, Yuanlong 1,2,3; Guo, Yaru 1,2; Zhu, Yanan 1,2; Kido, Shoichiro 4; Zhang, Lei 5,6; Wang, Fan1,2,3
	2022-11-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	52 期号:11 页码:2789-2806
通讯作者	Li, Yuanlong(iyuanlong@qdio.ac.cn)
摘要	Prominent interannual-to-decadal variations were observed in both heat content and mesoscale eddy activity in the southeast Indian Ocean (SEIO) during 1993-2020. The 2000-01 and 2008-14 periods stand out with increased 0-700-m ocean heat content (OHC) by similar to 4.0 x 10(21) J and enhanced surface eddy kinetic energy (EKE) by 12.5% over 85 degrees-115 degrees E, 35 degrees-12 degrees S. This study provides insights into the key dynamical processes conducive to these variations by analyzing observational datasets and high-resolution regional ocean model simulations. The strengthening of the Indonesian Throughflow (ITF) and anomalous cyclonic winds over the SEIO region during the two periods are demonstrated to be the most influential. While the ITF caused prevailing warming of the upper SEIO, the cyclonic winds cooled the South Equatorial Current and attenuated the warming in the subtropical SEIO by evoking upwelling Rossby waves. The EKE increase exerts significant influence on OHC only in the Leeuwin Current system. Dynamical instabilities of the Leeuwin Current give rise to high EKEs and westward eddy heat transport in climatology. As the Leeuwin Current was enhanced by both the ITF and local winds, the elevated EKEs drove anomalous heat convergence on its offshore flank. This process considerably contributes to the OHC increase in the subtropical SEIO and erases the wind-driven cooling during the two warm periods. This work highlights the vital role of eddies in regional heat redistribution, with implications for understanding time-varying ocean heat storage in a changing climate.
关键词	Indian Ocean Ocean circulation Decadal variability
DOI	10.1175/JPO-D-22-0051.1
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2019YFA0606702] ; Qingdao National Laboratory for Marine Science and Technology Shandong Grant[2022QNLM010303-1] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; JSPS Grants-in-Aid for Scientific Research (KAKENHI)[JP21K13997]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000884471500012
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：4[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/337002/180375
专题	海洋环流与波动重点实验室
通讯作者	Li, Yuanlong
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 4.Japan Agcy Marine Earth Sci & Technol, Applicat Lab, Yokohama, Japan 5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 6.Univ Colorado Boulder, Dept Atmospher & Ocean Sci, Boulder, CO USA
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Li, Yuanlong,Guo, Yaru,Zhu, Yanan,et al. Variability of Heat Content and Eddy Kinetic Energy in the Southeast Indian Ocean: Roles of the Indonesian Throughflow and Local Wind Forcing[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2022,52(11):2789-2806.
APA	Li, Yuanlong,Guo, Yaru,Zhu, Yanan,Kido, Shoichiro,Zhang, Lei,&Wang, Fan.(2022).Variability of Heat Content and Eddy Kinetic Energy in the Southeast Indian Ocean: Roles of the Indonesian Throughflow and Local Wind Forcing.JOURNAL OF PHYSICAL OCEANOGRAPHY,52(11),2789-2806.
MLA	Li, Yuanlong,et al."Variability of Heat Content and Eddy Kinetic Energy in the Southeast Indian Ocean: Roles of the Indonesian Throughflow and Local Wind Forcing".JOURNAL OF PHYSICAL OCEANOGRAPHY 52.11(2022):2789-2806.

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