Origins of Eddy Kinetic Energy in the Bay of Bengal
Chen, Gengxin1; Li, Yuanlong2,3; Xie, Qiang1,4; Wang, Dongxiao1; Wang, Dongxiao(Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China)
2018-03-01
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号123期号:3页码:2097-2115
产权排序第1完成单位 ; 第2完成单位 ; 第3完成单位 ; 第4完成单位
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).
文章类型Article
关键词Eddy Kinetic Energy Ocean Internal Instability Remote Equatorial Wind Local Wind Bay Of Bengal
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/2017JC013455
URL查看原文
收录类别SCI
语种英语
关键词[WOS]EQUATORIAL INDIAN-OCEAN ; PACIFIC SUBTROPICAL COUNTERCURRENT ; SEA-SURFACE HEIGHT ; INTRASEASONAL VARIABILITY ; INTERANNUAL VARIABILITY ; COASTAL CURRENT ; SALINITY STRATIFICATION ; TROPICAL PACIFIC ; SST VARIABILITY ; NORTH-ATLANTIC
WOS类目Oceanography
WOS记录号WOS:000430918500030
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.idsse.ac.cn/handle/183446/5954
专题深海科学研究部_海洋环流观测与数值模拟研究室
通讯作者Wang, Dongxiao; Wang, Dongxiao(Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China)
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
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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,&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.
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