Observed Deep Intraseasonal Variability in the Western Equatorial Pacific Ocean: Yanai Waves Originated from the Western Boundary
文献类型：期刊论文
| 作者 | Zhang, Hang1,3,5; Wang, Jianing1,3,4,5; Zhang, Zhixiang1,3,4,5; Ma, Weidong1,3,4,5; Wang, Fan1,3,4,5; Du, Yan2,3,6 |
| 刊名 | JOURNAL OF PHYSICAL OCEANOGRAPHY
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 55期号:12页码:2421-2431 |
| 关键词 | Pacific Ocean Tropics Inertia-gravity waves In situ oceanic observations Intraseasonal variability Rossby waves |
| ISSN号 | 0022-3670 |
| DOI | 10.1175/JPO-D-25-0031.1 |
| 通讯作者 | Wang, Jianing(wjn@qdio.ac.cn) |
| 英文摘要 | Substantial deep intraseasonal kinetic energy (IKE) over 1000-3000-m depth with a 20-90-day period was detected from 5-yr mooring data in the western equatorial Pacific Ocean. Deep intraseasonal variability (ISV) is mainly concentrated in the meridional velocity V with a peak period of 50 days. The frequency-vertical mode number spectrum of V suggests that 81% of IKE is related to Yanai waves. The IKE is mainly concentrated on vertical modes of 2-6. Furthermore, the core frequency of deep ISV at 2464 m has a seasonal variation and negative correlation with the zonal velocity, which belongs to the upper deep branch of Pacific meridional overturning circulation (U-PMOC), and has a strong seasonal variability. Such a relationship suggests the Doppler shift effect and westward phase propagation of Yanai waves. The outputs from a reanalysis product identify observed characteristics of deep ISV and are used to study its energy source. The IKE over 1500-3000 m at the mooring site of 142 degrees E originates from the intermediate layer over 1000-1750 m between 134 degrees and 137 degrees E, which is generated by barotropic instability associated with the horizontal shear of the intermediate currents. Yanai waves are responsible for energy transmission from the intermediate layer of the western side to the deep layer of the eastern side. This research highlights the critical role of Yanai waves in the energy transfer between the intermediate and deep layers of the equatorial ocean. |
| WOS关键词 | TROPICAL PACIFIC ; CURRENTS ; JETS ; SUBTHERMOCLINE ; TRANSPORTS ; SEA |
| 资助项目 | National Natural Science Foundation of China (NSFC)[42222602] ; National Natural Science Foundation of China (NSFC)[92258301] ; Science and Technology Innovation Project of Laoshan Laboratory[LSKJ202203100] ; TS Scholar Program ; NSFC[42221005] ; NSFC[42090040] ; NSFC[42349909] |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001622041100003 |
| 出版者 | AMER METEOROLOGICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204244]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Wang, Jianing |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Qingdao Marine Sci & Technol Ctr, Lab Ocean Dynam & Climate, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 6.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Sci & Technol Operat Oceanog, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hang,Wang, Jianing,Zhang, Zhixiang,et al. Observed Deep Intraseasonal Variability in the Western Equatorial Pacific Ocean: Yanai Waves Originated from the Western Boundary[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2025,55(12):2421-2431. |
| APA | Zhang, Hang,Wang, Jianing,Zhang, Zhixiang,Ma, Weidong,Wang, Fan,&Du, Yan.(2025).Observed Deep Intraseasonal Variability in the Western Equatorial Pacific Ocean: Yanai Waves Originated from the Western Boundary.JOURNAL OF PHYSICAL OCEANOGRAPHY,55(12),2421-2431. |
| MLA | Zhang, Hang,et al."Observed Deep Intraseasonal Variability in the Western Equatorial Pacific Ocean: Yanai Waves Originated from the Western Boundary".JOURNAL OF PHYSICAL OCEANOGRAPHY 55.12(2025):2421-2431. |
入库方式： OAI收割
来源：海洋研究所
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