A Mechanism for the Generation of a Warm SST Anomaly in the Western Equatorial Pacific: A Pathway Perspective
文献类型：期刊论文
| 作者 | Gao, Chuan1,4 ; Zhang, Rong-Hua1,2,3
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 128期号:11页码:22 |
| 关键词 | El Nino onset NECC pathways SST anomaly generation wind response ocean modeling |
| ISSN号 | 2169-9275 |
| DOI | 10.1029/2023JC020119 |
| 通讯作者 | Zhang, Rong-Hua(rzhang@nuist.edu.cn) |
| 英文摘要 | Processes leading to the onset and development of an El Nino event in the tropical Pacific remain elusive. Observed data and Ocean General Circulation Model (OGCM) simulations are used to reveal a well-defined pattern of sea surface temperature (SST) perturbations along the mean North Equatorial Countercurrent (NECC) pathways in association with the onset and evolution of some El Nino events. The OGCM-based sensitivity experiments are conducted to illustrate how a warm SST anomaly (SSTA) on the equator can result from a thermal forcing that is prescribed north of 10 degrees N, similar to observed SST anomalies in December 1988. Within approximately one year, the imposed SST anomaly north of 10 degrees N tends to be transported to the dateline region on the equator by the mean ocean circulation in the western Pacific (the low-latitude western boundary current and the NECC). In due course, an upper-layer ocean warming is generated off the equator at 6-10 degrees N and then on the equator, which acts to induce a westerly wind anomaly response; a simple statistical atmospheric wind stress model is then used to depict an expected westerly wind response. These resultant SST and surface wind perturbations can couple together over the western tropical Pacific, forming air-sea interactions and setting up a stage for El Nino onset. As such, this pathway mechanism can reasonably well explain the first appearance of a warm SST anomaly on the equator in the dateline region and the corresponding development of westerly wind anomalies over the western Pacific in association with El Nino onset. |
| WOS关键词 | EL-NINO ; COUPLED MODEL ; OCEAN ; ENSO ; CIRCULATION ; SIMULATION ; VARIABILITY ; PREDICTIONS ; PROGRESS ; LAYER |
| 资助项目 | The authors wish to thank the anonymous reviewers for their comments and suggestions that helped to improve the original manuscript. This work is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (CAS; XDB42000000), th[XDB42000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[42176032] ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[42030410] ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[LSKJ202202402] ; National Natural Science Foundation of China[XDB40000000] ; Strategic Priority Research Program of CAS |
| WOS研究方向 | Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:001098889700001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/183891]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Zhang, Rong-Hua |
| 作者单位 | 1.Laoshan Lab, Qingdao, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Chuan,Zhang, Rong-Hua. A Mechanism for the Generation of a Warm SST Anomaly in the Western Equatorial Pacific: A Pathway Perspective[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2023,128(11):22. |
| APA | Gao, Chuan,&Zhang, Rong-Hua.(2023).A Mechanism for the Generation of a Warm SST Anomaly in the Western Equatorial Pacific: A Pathway Perspective.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,128(11),22. |
| MLA | Gao, Chuan,et al."A Mechanism for the Generation of a Warm SST Anomaly in the Western Equatorial Pacific: A Pathway Perspective".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 128.11(2023):22. |
入库方式： OAI收割
来源：海洋研究所
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