Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach
文献类型：CNKI期刊论文
| 作者 | HONG XiaoYuan; HU HaiBo; YANG XiuQun; ZHANG Yuan; LIU GuoQiang; LIU Wei
|
| 发表日期 | 2014-11-01 |
| 出处 | Science China(Earth Sciences)
 |
| 关键词 | Indian Ocean Basin Mode,Indian Dipole Mode,El Ni?o,Walker circulation anomalies |
| 英文摘要 | Both the tropical Indian and tropical Pacific Oceans are active atmosphere-ocean interactive regions with robust interannual variability, which also constitutes a linkage between the two basins in the mode of variability. Using a global atmosphereocean coupled model, we conducted two experiments(CTRL and PC) to explore the contributions of Indian Ocean interannual sea surface temperature(SST) modes to the occurrence of El Ni?o events. The results show that interannual variability of the SST in the Indian Ocean induces a rapid growth of El Ni?o events during the boreal autumn in an El Ni?o developing year. However, it weakens El Ni?o events or even promotes cold phase conversions in an El Ni?o decaying year. Therefore, the entire period of the El Ni?o is shortened by the interannual variations of the Indian Ocean SST. Specifically, during the El Ni?o developing years, the positive Indian Ocean Dipole(IOD) events force an anomalous Walker circulation, which then enhances the existing westerly wind anomalies over the west Pacific. This will cause a warmer El Ni?o event, with some modulations by ocean advection and oceanic Rossby and Kelvin waves. However, with the onset of the South Asian monsoon, the Indian Ocean Basin(IOB) warming SST anomalies excite low level easterly wind anomalies over the west tropical Pacific during the El Ni?o decaying years. As a result, the El Ni?o event is prompted to change from a warm phase to a cold phase. At the same time, an associated atmospheric anticyclone anomaly appears and leads to a decreasing precipitation anomaly over the northwest Pacific. In summary, with remote forcing in the atmospheric circulation, the IOD mode usually affects the El Ni?o during the developing years, whereas the IOB mode affects the El Ni?o during the decaying years. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | supported by the National Basic Research Program of China(Grant Nos.2010CB428504,2012CB956002) ; the National Natural Science Foundation of China(Grant Nos.40906005,41105059,41065005,GYHY2011-06017,GYHY201306027) ; the National Key Technologies R&D Program of China(Grant No.2009BAC51B01) ; the Jiangsu Collaborative Innovation Center for Climate Change |
| 卷 | v.57期:11页:54-65 |
| 语种 | 英文; |
| 分类号 | P732 |
| ISSN号 | 1674-7313 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190263]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.UniversityofChineseAcademyofSciences 2.InstituteofOceanology,ChineseAcademyofSciences 3.SchoolofAtmosphericSciences,NanjingUniversity 4.CanadaBedfordInstituteofOceanography 5.SchoolofMarineSciences,NanjingUniversityofInformationScienceandTechnology 6.ScrippsInstitutionofOceanography,UniversityofCalifornia |
| 推荐引用方式 GB/T 7714 | HONG XiaoYuan,HU HaiBo,YANG XiuQun,et al. Influences of Indian Ocean interannual variability on different stages of El Nio: A FOAM1.5 model approach. 2014. |
入库方式： OAI收割
来源：海洋研究所
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