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| Influence of positive and negative Indian Ocean Dipoles on ENSO via the Indonesian Throughflow: Results from sensitivity experiments | |
| Zhou Qian1,2; Duan Wansuo1; Mu Mu3; Feng Rong1 | |
| 2015-06-01 | |
| 发表期刊 | ADVANCES IN ATMOSPHERIC SCIENCES
 |
| 卷号 | 32期号:6页码:783-793 |
| 文章类型 | Article |
| 摘要 | The role of the Indonesian Throughflow (ITF) in the influence of the Indian Ocean Dipole (IOD) on ENSO is investigated using version 2 of the Parallel Ocean Program (POP2) ocean general circulation model. We demonstrate the results through sensitivity experiments on both positive and negative IOD events from observations and coupled general circulation model simulations. By shutting down the atmospheric bridge while maintaining the tropical oceanic channel, the IOD forcing is shown to influence the ENSO event in the following year, and the role of the ITF is emphasized. During positive IOD events, negative sea surface height anomalies (SSHAs) occur in the eastern Indian Ocean, indicating the existence of upwelling. These upwelling anomalies pass through the Indonesian seas and enter the western tropical Pacific, resulting in cold anomalies there. These cold temperature anomalies further propagate to the eastern equatorial Pacific, and ultimately induce a La Nia-like mode in the following year. In contrast, during negative IOD events, positive SSHAs are established in the eastern Indian Ocean, leading to downwelling anomalies that can also propagate into the subsurface of the western Pacific Ocean and travel further eastward. These downwelling anomalies induce negative ITF transport anomalies, and an El Nio-like mode in the tropical eastern Pacific Ocean that persists into the following year. The effects of negative and positive IOD events on ENSO via the ITF are symmetric. Finally, we also estimate the contribution of IOD forcing in explaining the Pacific variability associated with ENSO via ITF. |
| 关键词 | Iod Pacific Ocean Enso Indonesian Throughflow |
| DOI | 10.1007/s00376-014-4141-0 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000352067100005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/25449 |
| 专题 | 海洋环流与波动重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou Qian,Duan Wansuo,Mu Mu,et al. Influence of positive and negative Indian Ocean Dipoles on ENSO via the Indonesian Throughflow: Results from sensitivity experiments[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2015,32(6):783-793. |
| APA | Zhou Qian,Duan Wansuo,Mu Mu,&Feng Rong.(2015).Influence of positive and negative Indian Ocean Dipoles on ENSO via the Indonesian Throughflow: Results from sensitivity experiments.ADVANCES IN ATMOSPHERIC SCIENCES,32(6),783-793. |
| MLA | Zhou Qian,et al."Influence of positive and negative Indian Ocean Dipoles on ENSO via the Indonesian Throughflow: Results from sensitivity experiments".ADVANCES IN ATMOSPHERIC SCIENCES 32.6(2015):783-793. |
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