globalchange  > 气候减缓与适应
DOI: 10.1002/2017JC013455
Scopus记录号: 2-s2.0-85044187700
论文题名:
Origins of Eddy Kinetic Energy in the Bay of Bengal
作者: Chen G.; Li Y.; Xie Q.; Wang D.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:3
起始页码: 2097
结束页码: 2115
语种: 英语
英文关键词: Bay of Bengal ; eddy kinetic energy ; local wind ; ocean internal instability ; remote equatorial wind
Scopus关键词: atmospheric forcing ; climate oscillation ; coastal current ; eddy ; Ekman pumping ; instability ; kinetic energy ; oceanic general circulation model ; satellite data ; seasonality ; spatial distribution ; wind forcing ; Bay of Bengal ; Greater Sunda Islands ; Indian Ocean ; Indian Ocean ; Sri Lanka ; Sumatra ; Sunda Isles
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). © 2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114415
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China

Recommended Citation:
Chen G.,Li Y.,Xie Q.,et al. Origins of Eddy Kinetic Energy in the Bay of Bengal[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)
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