Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change
文献类型：期刊论文
| 作者 | Lu, Ying2,3 ; Li, Yuanlong2,4,5; Duan, Jing2,4; Lin, Pengfei1; Wang, Fan2,3,4
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| 刊名 | JOURNAL OF CLIMATE
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| 出版日期 | 2022-03-01 |
| 卷号 | 35期号:5页码:1479-1496 |
| 关键词 | Indian Ocean Sea level Salinity Multidecadal variability |
| ISSN号 | 0894-8755 |
| DOI | 10.1175/JCLI-D-21-0288.1 |
| 通讯作者 | Li, Yuanlong(liyuanlong@qdio.ac.cn) |
| 英文摘要 | Regional sea level rise in the southeast Indian Ocean (SEIO) exerts growing threats to the surrounding Australian and Indonesian coasts, but the mechanisms of sea level rise have not been firmly established. By analyzing observational datasets and model results, this study investigates multidecadal steric sea level (SSL) rise of the SEIO since the mid-twentieth century, underscoring a significant role of ocean salinity change. The average SSL rising rate from 1960 through 2018 was 7.4 +/- 2.4 mm decade(-1), and contributions of the halosteric and thermosteric components were similar to 42% and similar to 58%, respectively. The notable salinity effect arises primarily from a persistent subsurface freshening trend at 400-1000 m. Further insights are gained through the decomposition of temperature and salinity changes into the heaving (vertical displacements of isopycnal surfaces) and spicing (density-compensated temperature and salinity change) modes. The subsurface freshening trend since 1960 is mainly attributed to the spicing mode, reflecting property modifications of the Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW) in the southern Indian Ocean. Also noteworthy is a dramatic acceleration of SSL rise (20.3 +/- 7.0 mm decade(-1)) since similar to 1990, which was predominantly induced by the thermosteric component (16.3 +/- 5.5 mm decade(-1)) associated with the heaving mode. Enhanced Ekman downwelling by surface winds and radiation forcing linked to global greenhouse gas warming mutually caused the depression of isopycnal surfaces, leading to the accelerated SSL rise through thermosteric effect. This study highlights the complexity of regional sea level rise in a rapidly changing climate, in which the role of ocean salinity is vital and time-varying. |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Natural Science Foundation of China (NSFC)[41806001] ; National Natural Science Foundation of China (NSFC)[41976026] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; National Key R&D Program of China[2019YFA0606702] ; Key Deployment Project of CAS Centre for Ocean MegaScience[COMS2019Q07] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000799197000006 |
| 出版者 | AMER METEOROLOGICAL SOC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/179329]  |
| 专题 | 海洋研究所_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, Inst Atmospher Phys, LASG, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Oceanol & Ctr Ocean Megasci, Key Lab Ocean Circulat & Waves, CAS, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Ying,Li, Yuanlong,Duan, Jing,et al. Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change[J]. JOURNAL OF CLIMATE,2022,35(5):1479-1496. |
| APA | Lu, Ying,Li, Yuanlong,Duan, Jing,Lin, Pengfei,&Wang, Fan.(2022).Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change.JOURNAL OF CLIMATE,35(5),1479-1496. |
| MLA | Lu, Ying,et al."Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change".JOURNAL OF CLIMATE 35.5(2022):1479-1496. |
入库方式： OAI收割
来源：海洋研究所
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