Eastward Shift of Interannual Climate Variability in the South Indian Ocean since 1950
文献类型：期刊论文
| 作者 | Zhang, Lei2; Han, Weiqing2; Karnauskas, Kristopher B.1,2; Li, Yuanlong2,4,5; Tozuka, Tomoki3 |
| 刊名 | JOURNAL OF CLIMATE
 |
| 出版日期 | 2022 |
| 卷号 | 35期号:2页码:561-575 |
| 关键词 | Indian Ocean Climate variability Tropical variability |
| ISSN号 | 0894-8755 |
| DOI | 10.1175/JCLI-D-21-0356.1 |
| 通讯作者 | Zhang, Lei(lezh8230@colorado.edu) |
| 英文摘要 | The subtropical Indian Ocean dipole (SIOD) and Ningaloo Nino are the two dominant modes of interannual climate variability in the subtropical south Indian Ocean. Observations show that the SIOD has been weakening in the recent decades, while Ningaloo Nino has been strengthening. In this study, we investigate the causes for such changes by analyzing climate model experiments using the NCAR Community Earth System Model, version 1 (CESM1). Ensemble-mean results from CESM1 large-ensemble (CESM1-LE) show that the external forcing causes negligible changes in the amplitudes of the SIOD and Ningaloo Nino, suggesting a dominant role of internal climate variability. Meanwhile, results from CESM1 pacemaker experiments reveal that the observed changes in the two climate modes cannot be attributed to the effect of sea surface temperature anomalies (SSTA) in either the eastern tropical Pacific Ocean or tropical Indian Ocean. By further comparing different ensemble members from the CESM1-LE, we find that a warm pool dipole mode of decadal variability, with opposite SSTA in the southeast Indian Ocean and the western-central tropical Pacific Ocean plays an important role in driving the observed changes in the SIOD and Ningaloo Nino. These changes in the two climate modes have considerable impacts on precipitation and sea level variabilities in the south Indian Ocean region. |
| 资助项目 | NSF AGS[1935279] ; NSF AGS[NSF OCE 1658132] ; National Key R&D Program of China[2019YFA0606702] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; National Science Foundation |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000799188000007 |
| 出版者 | AMER METEOROLOGICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/179416]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Zhang, Lei |
| 作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO USA 2.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA 3.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo, Japan 4.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lei,Han, Weiqing,Karnauskas, Kristopher B.,et al. Eastward Shift of Interannual Climate Variability in the South Indian Ocean since 1950[J]. JOURNAL OF CLIMATE,2022,35(2):561-575. |
| APA | Zhang, Lei,Han, Weiqing,Karnauskas, Kristopher B.,Li, Yuanlong,&Tozuka, Tomoki.(2022).Eastward Shift of Interannual Climate Variability in the South Indian Ocean since 1950.JOURNAL OF CLIMATE,35(2),561-575. |
| MLA | Zhang, Lei,et al."Eastward Shift of Interannual Climate Variability in the South Indian Ocean since 1950".JOURNAL OF CLIMATE 35.2(2022):561-575. |
入库方式： OAI收割
来源：海洋研究所
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