Origins of Eddy Kinetic Energy in the Bay of Bengal

doi:10.1002/2017JC013455

	Origins of Eddy Kinetic Energy in the Bay of Bengal
	Chen, Gengxin 1; Li, Yuanlong 2,3; Xie, Qiang 1,4; Wang, Dongxiao 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2018-03-01
卷号	123 期号:3 页码:2097-2115
关键词	Eddy Kinetic Energy Ocean Internal Instability Remote Equatorial Wind Local Wind Bay Of Bengal
ISSN号	2169-9275
DOI	10.1002/2017JC013455
文献子类	Article
英文摘要	By analyzing satellite observational data and ocean general circulation model experiments, this study investigates the key processes that determine the spatial distribution and seasonality of intraseasonal eddy kinetic energy (EKE) within the Bay of Bengal (BOB). It is revealed that a complicated mechanism involving both local and remote wind forcing and ocean internal instability is responsible for the generation and modulation of EKE in this region. High-level EKE mainly resides in four regions: east of Sri Lanka (Region 1), the western BOB (Region 2), northwest of Sumatra (Region 3), and the coastal rim of the BOB (Region 4). The high EKE levels in Regions 1 and 2 are predominantly produced by ocean internal instability, which contributes 90% and 79%, respectively. Prominent seasonality is also observed in these two regions, with higher EKE levels in boreal spring and fall due to enhanced instability of the East Indian Coast Current and the Southwest Monsoon Current, respectively. In contrast, ocean internal instability contributes 49% and 52% of the total EKE in Regions 3 and 4, respectively, whereas the atmospheric forcing of intraseasonal oscillations (ISOs) also plays an important role. ISOs produce EKE mainly through wind stress, involving both the remote effect of equatorial winds and the local effect of monsoonal winds. Equatorial-origin wave signals significantly enhance the EKE levels in Regions 3 and 4, in the form of reflected Rossby waves and coastal Kelvin waves, respectively. The local wind forcing effect through Ekman pumping also has a significant contribution in Regions 3 and 4 (24% and 22%, respectively).
WOS关键词	EQUATORIAL INDIAN-OCEAN ; PACIFIC SUBTROPICAL COUNTERCURRENT ; SEA-SURFACE HEIGHT ; INTRASEASONAL VARIABILITY ; INTERANNUAL VARIABILITY ; COASTAL CURRENT ; SALINITY STRATIFICATION ; TROPICAL PACIFIC ; SST VARIABILITY ; NORTH-ATLANTIC
WOS研究方向	Oceanography
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000430918500030
资助机构	NSFC(41476011 ; State Key Laboratory of Tropical Oceanography SCSIO(LTOZZ1702) ; Youth Innovation Promotion Association CAS(2017397) ; Guangzhou Science and Technology Foundation(201804010133) ; 41776001 ; 41676010 ; 41521005)
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/11471]
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Wang, Dongxiao
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 4.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, Sanya, Peoples R China
推荐引用方式 GB/T 7714	Chen, Gengxin,Li, Yuanlong,Xie, Qiang,et al. Origins of Eddy Kinetic Energy in the Bay of Bengal[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,123(3):2097-2115.
APA	Chen, Gengxin,Li, Yuanlong,Xie, Qiang,&Wang, Dongxiao.(2018).Origins of Eddy Kinetic Energy in the Bay of Bengal.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,123(3),2097-2115.
MLA	Chen, Gengxin,et al."Origins of Eddy Kinetic Energy in the Bay of Bengal".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123.3(2018):2097-2115.