Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean | |
Zhang, Zhixiang1,2,3,4 ; Wang, Jianing1,2,3,4; Wang, Fan1,2,3,4; Ma, Qiang1,2,3,4
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| 2022-04-01 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
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| ISSN | 2169-9275 |
| 卷号 | 127期号:4页码:19 |
| 通讯作者 | Wang, Jianing(wjn@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn) |
| 摘要 | Strong multi-timescale variabilities of subsurface zonal velocity over 300-600 m depth are observed beneath the North Equatorial Countercurrent (NECC) by the mooring observation at 4.7 degrees N, 140 degrees E during 2014-2018. The observed subsurface velocity shows peaks at intraseasonal, semiannual, and annual periods, and is interconnected with the El Nino-Southern Oscillation (ENSO) cycle at a nearly zero lag. Aided by a reanalysis product, we reveal mechanisms for the above variabilities. Forced by wind stress curl over 150 degrees-155 degrees E and 160 degrees-170 degrees E along 4.7 degrees N, the vertical propagation of the third meridional mode long Rossby waves is primarily responsible for the observed semiannual and annual cycles, respectively. The subsurface intraseasonal variability with peak periods of 50- and 80-day are induced by short Rossby waves with the southeastward and downward group velocity. Such waves interconnect observed 50- and 80-day ISV of the subsurface current to that of surface currents at 8 degrees N, 128 degrees-130 degrees E and 6.5 degrees N, 132 degrees-134 degrees E, respectively. The ENSO variability results mainly from the interannual change of the winds that force the long Rossby waves. The wind forcing leads the Nino 3.4 index and the subsurface velocity by a similar time, resulting in the subsurface instantaneous response to ENSO. |
| 关键词 | equatorial Rossby waves subsurface variability intraseasonal variability annual variability interannual variability |
| DOI | 10.1029/2021JC017969 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China (NSFC)[42106009] ; NSFC[42006003] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22000000] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SYS034] |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:000781720200001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/178694 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Wang, Jianing; Wang, Fan |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 3.Chinese Acad Sci, Cente Ocean Megasci, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 第一作者单位 | 海洋环流与波动重点实验室 |
| 通讯作者单位 | 海洋环流与波动重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Zhixiang,Wang, Jianing,Wang, Fan,et al. Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(4):19. |
| APA | Zhang, Zhixiang,Wang, Jianing,Wang, Fan,&Ma, Qiang.(2022).Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(4),19. |
| MLA | Zhang, Zhixiang,et al."Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.4(2022):19. |
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| JGR Oceans - 2022 - （8382KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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