Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| Intraseasonal Variability of the North Equatorial Current Bifurcation Off the Philippines | |
Zhou, Hui1,2,3; Liu, Xueqi1,2,3 ; Li, Ruixiang4; Wang, Yonggang5,6,7,8; Yang, Guang5,6,7,8
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| 2021-11-01 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
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| ISSN | 2169-9275 |
| 卷号 | 126期号:11页码:16 |
| 通讯作者 | Zhou, Hui([email protected]) |
| 摘要 | Characteristics of the intraseasonal variability (ISV) of the North Equatorial Current bifurcation latitude (NBL) are analyzed by using both observations and reanalysis data. The maximum amplitude of the ISV of the NBL can reach about 6 degrees of latitude, which almost triples its annual excursion. The NBL shows a broad spectral peak around 50-140 days with the highest peak occurring around 73 days. Both the Madden-Julian oscillation and mesoscale eddies have a significant impact on its ISV. A case study for a cyclonic eddy indicates that it can transport about 1.5 Sv (1 Sv-10(6) m(3) s(-1)) waters to the NBL, and the bifurcation shifts northward with an amplitude of about 8 degrees of latitude in 1 month. Meanwhile, the influence of mesoscale eddies on the ISV of the NBL is highly modulated by the interannual variations of the eddy field. Active eddy activities associated with enhanced barotropic and baroclinic instabilities show a large influence on the NBL. The eddy kinetic energy level around the NBL showed a quite diverse character for the 1997-1998 and the 2015-2016 extreme El Ninos, with the latter being double or triple that of the former due to the much stronger vertical and horizontal shears. Given the significant impact on the NBL by the individual eddies and the unevenly distributed cyclonic and anticyclonic eddies around the NBL, the effect of mesoscale eddies on the bifurcation latitude may not cancel each other on seasonal or interannual time scales. |
| 关键词 | western tropical Pacific Ocean NEC bifurcation intraseasonal variability mesoscale eddy MJO cyclonic eddy |
| DOI | 10.1029/2021JC017646 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | NSFC[41776042]; NSFC[41876009]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:000723095600031 |
| 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/337002/177522 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Zhou, Hui |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.State Ocean Adm, South China Sea Marine Survey & Technol Ctr, Guangzhou, Peoples R China 5.Minist Nat Resources, Inst Oceanog 1, Qingdao, Peoples R China 6.Minist Nat Resources, Key Lab Marine Sci & Numer Modeling, Qingdao, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China 8.Shandong Key Lab Marine Sci & Numer Modeling, Qingdao, 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 | Zhou, Hui,Liu, Xueqi,Li, Ruixiang,et al. Intraseasonal Variability of the North Equatorial Current Bifurcation Off the Philippines[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2021,126(11):16. |
| APA | Zhou, Hui,Liu, Xueqi,Li, Ruixiang,Wang, Yonggang,&Yang, Guang.(2021).Intraseasonal Variability of the North Equatorial Current Bifurcation Off the Philippines.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,126(11),16. |
| MLA | Zhou, Hui,et al."Intraseasonal Variability of the North Equatorial Current Bifurcation Off the Philippines".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 126.11(2021):16. |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| JGR Oceans - 2021 - （5032KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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