Persistent mixing bursts in the equatorial Pacific thermocline induced by persistent equatorial waves
文献类型：期刊论文
| 作者 | Zhang, Jingjing2,3; Liu, Chuanyu1,2; Gong, Xiang3; Wang, Fan1,2
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| 刊名 | JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2024-02-28 |
| 页码 | 19 |
| 关键词 | interior turbulent mixing layer (ITML) weakly sheared layer (WSL) Equatorial Undercurrent (EUC) core occurrence probability seasonality |
| ISSN号 | 2096-5508 |
| DOI | 10.1007/s00343-023-2350-z |
| 通讯作者 | Liu, Chuanyu(chuanyu.liu@qdio.ac.cn) |
| 英文摘要 | A recent study by Liu et al. (2020) suggested that due to the saturation of equatorially trapped planetary waves with different dynamical types, temporal periods, meridional and baroclinic modes, complex layer structures of vertical velocity shear and hence turbulent mixing could frequently occur in the thermocline of the eastern equatorial Pacific. We investigated the occurrence of the interior turbulent mixing as indicated by shear instabilities, above the Equatorial Undercurrent (EUC) core at three equatorial sites along 140 degrees W, 170 degrees W, and 165 degrees E, respectively, based mainly on data from the Tropical Atmosphere and Ocean (TAO) mooring array. We found that turbulent mixing bursts persisted in the thermocline of all three sites. Specifically, the interior turbulent mixing layers (ITMLs) could occur in probability of approximately 68%, 53%, and 48% at the three sites, respectively. The overall occurrence probability shows obvious and similar biannual variations at 140 degrees W and 170 degrees W, which is higher in boreal from late summer to winter and lower in spring. Vertically, the ITMLs are primarily located above the EUC core and prevail in deeper (shallower) layers from late summer to winter (spring). Most ITMLs (70%) lasted for hours to 3 days, and a few of them (15%) for more than 7 days. The thicknesses of ITMLs were concentrated between 15 and 55 m. At 165 degrees E, the vertical distribution of ITML occurrence probability was different from that at 140 degrees W and 170 degrees W, as it did not show a preference for depths; the durations of ITMLs are short (also from hours to several days) and their thicknesses were between 5 and 25 m. These properties, particularly the high occurrence probability, and short durations demonstrated the persistence of thermocline mixing in the western to eastern equatorial Pacific thermocline and confirmed the generation mechanism by persistent equatorial waves as well. |
| WOS关键词 | DEEP-CYCLE TURBULENCE ; SHEAR ; INSTABILITY ; OCEAN ; VARIABILITY ; SCALE ; LAYER |
| 资助项目 | National Natural Science Foundation of China (NSFC)[41730534] ; Laoshan Laboratory Science and Technology Innovation Program[LSKJ202202502] ; NSFC[41976012] ; NSFC[42090044] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] |
| WOS研究方向 | Marine & Freshwater Biology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001174232300002 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/184926]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Liu, Chuanyu |
| 作者单位 | 1.Laoshan Lab, Qingdao 266237, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao 266071, Peoples R China 3.Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Jingjing,Liu, Chuanyu,Gong, Xiang,et al. Persistent mixing bursts in the equatorial Pacific thermocline induced by persistent equatorial waves[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2024:19. |
| APA | Zhang, Jingjing,Liu, Chuanyu,Gong, Xiang,&Wang, Fan.(2024).Persistent mixing bursts in the equatorial Pacific thermocline induced by persistent equatorial waves.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,19. |
| MLA | Zhang, Jingjing,et al."Persistent mixing bursts in the equatorial Pacific thermocline induced by persistent equatorial waves".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2024):19. |
入库方式： OAI收割
来源：海洋研究所
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