Revisiting the Dynamics of Interannual Variations of the Upper Luzon Strait Transport
文献类型：期刊论文
| 作者 | Nan, Feng1,5,6,7; Du, Shuo5,6,7; Yu, Fei1,5,6,7; Xue, Huijie4; Li, Mingting2,3; Wang, Ran6,7 |
| 刊名 | JOURNAL OF PHYSICAL OCEANOGRAPHY
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| 出版日期 | 2025-07-01 |
| 卷号 | 55期号:7页码:903-918 |
| 关键词 | Boundary currents Channel flows Ocean dynamics Transport |
| ISSN号 | 0022-3670 |
| DOI | 10.1175/JPO-D-24-0103.1 |
| 通讯作者 | Nan, Feng(nanfeng0515@qdio.ac.cn) |
| 英文摘要 | The Luzon Strait Transport (LST) plays an important role in the heat and salt budgets, circulation variations, eddy generation, and biogeochemical cycles in the South China Sea (SCS). Due to lack of long-term observations, the LST interannual variations and the underlying dynamics remain ambiguous. Using satellite altimeter data, the longterm upper LST (upper 500 m) over the past 30 years (1993-2022) was first estimated in this study. The mean value of the LST is estimated at 4.18 Sv (1 Sv ; 106 m3 s21) with a standard deviation of 1.03 Sv at the interannual time scale. The LST interannual variations are not correlated with the upstream Kuroshio changes against the well-known "teapot effect" adopted by most previous studies but well correlated with the migration of the North Equatorial Current bifurcation (Yb) and wind stress curl anomaly (WSCa) east of the Philippines. It is found that positive/negative WSCa in the off-equatorial region associated with westerly/easterly wind anomalies in the western tropical Pacific could induce westward upwelling/ downwelling Rossby waves, corresponding to negative/positive sea level anomalies (SLAs). When approaching the eastern coast of the Philippines, negative/positive SLAs were transferred along the Philippines coast as coastal Kelvin waves through the Mindoro-Sibutu pathway. Thus, cyclonic/anticyclonic circulation anomaly formed to the east and around the Philippines, resulting in strong/weak LST. Using the time-dependent island rule theory, the LST interannual variations driven by large-scale and regional wind were quantified. This dynamic framework can interpret approximately two-thirds of the LST interannual variations, providing new insights into the dynamics of low-frequency variations of the Kuroshio intrusion into the SCS. SIGNIFICANCE STATEMENT: The strong Kuroshio intrudes into the South China Sea (SCS) through the Luzon Strait. The LST plays an important role in the physical oceanography and biogeochemical cycles in the SCS. Due to lack of long-term observations, dynamics on the interannual variations of the LST remain ambiguous. In this study, we first calculated long-term LST over the recent three decades. Using the time-dependent island rule theory, interannual variations of the LST were quantified by linking large-scale wind and oceanic waves (Rossby and Kelvin waves). The detailed dynamical processes controlling the LST interannual variations are illustrated. This dynamic framework can interpret most of the LST interannual variations, providing new insights on the dynamics of the western boundary current leaping across a gap. |
| WOS关键词 | SOUTH CHINA SEA ; NORTH EQUATORIAL CURRENT ; KUROSHIO INTRUSION ; DECADAL OSCILLATION ; MESOSCALE EDDIES ; MINDANAO CURRENT ; PACIFIC ; VARIABILITY ; CIRCULATION ; OCEAN |
| 资助项目 | National Key Research and Development Program of China[2022YFB3205300] ; National Natural Sci-ence Foundation of China[42376010] ; Taishan Scholars Program[tsqn202306282] |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001544876200002 |
| 出版者 | AMER METEOROLOGICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202758]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Nan, Feng |
| 作者单位 | 1.Qingdao Marine Sci & Technol Ctr, Lab Ocean Dynam & Climate, Qingdao, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab, Zhuhai, Peoples R China 3.Sun Yat Sen Univ, Sch Marine Sci, Zhuhai, Peoples R China 4.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nan, Feng,Du, Shuo,Yu, Fei,et al. Revisiting the Dynamics of Interannual Variations of the Upper Luzon Strait Transport[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2025,55(7):903-918. |
| APA | Nan, Feng,Du, Shuo,Yu, Fei,Xue, Huijie,Li, Mingting,&Wang, Ran.(2025).Revisiting the Dynamics of Interannual Variations of the Upper Luzon Strait Transport.JOURNAL OF PHYSICAL OCEANOGRAPHY,55(7),903-918. |
| MLA | Nan, Feng,et al."Revisiting the Dynamics of Interannual Variations of the Upper Luzon Strait Transport".JOURNAL OF PHYSICAL OCEANOGRAPHY 55.7(2025):903-918. |
入库方式： OAI收割
来源：海洋研究所
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