Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| Reduction of Equatorial Obduction by Atmospheric Intraseasonal Oscillations in the Western and Central Pacific Ocean | |
Liu, Lingling1,2; Li, Yuanlong1,2,3; Wang, Fan1,2
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| 2022-05-01 | |
| 发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
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| ISSN | 2169-9275 |
| 卷号 | 127期号:5页码:19 |
| 通讯作者 | Li, Yuanlong([email protected]) |
| 摘要 | Obduction is the large-scale, irreversible upward water transport from the permanent pycnocline to the surface mixed layer. Using Hybrid Coordinate Ocean Model (HYCOM), this study explores the impact of atmospheric intraseasonal oscillations (ISOs) on the Pacific equatorial obduction that plays a fundamental role in regulating the tropical Pacific climate. Parallel HYCOM experiments forced by atmospheric fields with and without ISO variability are compared to assess the effect of ISOs on the ocean. The results suggest that the ISOs can reduce the annual obduction rate of the western and central equatorial Pacific Ocean (WCEPO; 150 degrees E-160 degrees W, 5 degrees S-5 degrees N) by similar to 12%, and their impact on the eastern Pacific is rather limited. The ISOs cause prominent intraseasonal variability of mixed layer depth (MLD) in the WCEPO primarily through surface wind forcing, which in turn affects the two key processes controlling the annual obduction rate. First, the intraseasonal MLD deepening events narrow down the total time windows for obduction by similar to 30% and thereby give rise to the decrease in obduction rate; second, it leads to high-frequency entrainment events and enhances the entrainment rate by similar to 18%. The increased entrainment rate is overwhelmed by the reduced time windows for effective entrainment, and the net effect of ISOs is to reduce the obduction rate and modify its seasonal cycle. This work highlights the importance of atmospheric ISOs in the equatorial ocean dynamics, with implications for tropical surface temperature and climate variabilities and biogeochemical cycle. |
| 关键词 | atmospheric intraseasonal oscillation obduction western and central equatorial Pacific Ocean mixed layer depth intraseasonal variability |
| DOI | 10.1029/2021JC017901 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41976009]; National Key Research and Development Program of China[2019YFA0606702]; Shandong Provincial Natural Science Foundation[ZR2020JQ17]; Key Deployment Project of CAS Centre for Ocean Mega-Science[COMS2019Q07] |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:000797197400001 |
| 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/337002/179270 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Li, Yuanlong |
| 作者单位 | 1.Chinese Acad Sci, Ctr Ocean Mega Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 通讯作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Lingling,Li, Yuanlong,Wang, Fan. Reduction of Equatorial Obduction by Atmospheric Intraseasonal Oscillations in the Western and Central Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(5):19. |
| APA | Liu, Lingling,Li, Yuanlong,&Wang, Fan.(2022).Reduction of Equatorial Obduction by Atmospheric Intraseasonal Oscillations in the Western and Central Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(5),19. |
| MLA | Liu, Lingling,et al."Reduction of Equatorial Obduction by Atmospheric Intraseasonal Oscillations in the Western and Central Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.5(2022):19. |
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| JGR Oceans - 2022 - （6691KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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