Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| Interannual to Decadal Variability of Upper-Ocean Salinity in the Southern Indian Ocean and the Role of the Indonesian Throughflow | |
Hu, Shijian1,2,3,4; Zhang, Ying5,6,7; Feng, Ming7,8; Du, Yan5,6; Sprintall, Janet9; Wang, Fan1,3 ; Hu, Dunxin1,3; Xie, Qiang5,10; Chai, Fei2
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| 2019-10-01 | |
| Source Publication | JOURNAL OF CLIMATE
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| ISSN | 0894-8755 |
| Volume | 32Issue:19Pages:6403-6421 |
| Corresponding Author | Feng, Ming(ming.feng@csiro.au) |
| Abstract | Variability of oceanic salinity, an indicator of the global hydrological cycle, plays an important role in the basin-scale ocean circulation. In this study, interannual to decadal variability of salinity in the upper layer of the Indian Ocean is investigated using Argo observations since 2004 and data assimilating model outputs (1992-2015). The southeastern Indian Ocean shows the strongest interannual to decadal variability of upper-ocean salinity in the Indian Ocean. Westward propagation of salinity anomalies along isopycnal surfaces is detected in the southern Indian Ocean and attributed to zonal salinity advection anomalies associated with the Indonesian Throughflow and the South Equatorial Current. Composite and salinity budget analyses show that horizontal advection is a major contributor to the interannual to decadal salinity variability of the southern Indian Ocean, and the local air-sea freshwater flux plays a secondary role. The Pacific decadal oscillation (PDO) and El Nino-Southern Oscillation (ENSO) modulate the salinity variability in the southeastern Indian Ocean, with low salinity anomalies occurring during the negative phases of the PDO and ENSO and high salinity anomalies during their positive phases. The Indonesian Throughflow plays an essential role in transmitting the PDO- and ENSO-related salinity signals into the Indian Ocean. A statistical model is proposed based on the PDO index, which successfully predicts the southeastern Indian Ocean salinity variability with a lead time of 10 months. |
| Keyword | Indian Ocean Advection Atmosphere-ocean interaction ENSO Ocean circulation Thermocline |
| DOI | 10.1175/JCLI-D-19-0056.1 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Key Research Program of Frontier Sciences, CAS[QYZDB-SSWSYS023] ; National Natural Science Foundation of China[91858101] ; National Natural Science Foundation of China[41776018] ; National Natural Science Foundation of China[41730534] ; National Natural Science Foundation of China[41525019] ; China Scholarship Council ; NOAA's Climate Program Office, Climate Variability and Predictability Program[NA17OAR4310257] ; CSHOR |
| WOS Research Area | Meteorology & Atmospheric Sciences |
| WOS Subject | Meteorology & Atmospheric Sciences |
| WOS ID | WOS:000484615400001 |
| Publisher | AMER METEOROLOGICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/162697 |
| Collection | 海洋环流与波动重点实验室 |
| Corresponding Author | Feng, Ming |
| Affiliation | 1.Chinese Acad Sci, Ctr Ocean Mega Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Shandong, Peoples R China 2.State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Shandong, Peoples R China 4.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao, Shandong, Peoples R China 5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.CSIRO Oceans & Atmosphere, Crawley, WA, Australia 8.CSIRO Oceans & Atmosphere, Ctr Southern Hemisphere Oceans Res, Hobart, Tas, Australia 9.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA 10.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China |
| First Author Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Hu, Shijian,Zhang, Ying,Feng, Ming,et al. Interannual to Decadal Variability of Upper-Ocean Salinity in the Southern Indian Ocean and the Role of the Indonesian Throughflow[J]. JOURNAL OF CLIMATE,2019,32(19):6403-6421. |
| APA | Hu, Shijian.,Zhang, Ying.,Feng, Ming.,Du, Yan.,Sprintall, Janet.,...&Chai, Fei.(2019).Interannual to Decadal Variability of Upper-Ocean Salinity in the Southern Indian Ocean and the Role of the Indonesian Throughflow.JOURNAL OF CLIMATE,32(19),6403-6421. |
| MLA | Hu, Shijian,et al."Interannual to Decadal Variability of Upper-Ocean Salinity in the Southern Indian Ocean and the Role of the Indonesian Throughflow".JOURNAL OF CLIMATE 32.19(2019):6403-6421. |
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| Hu-2019-Interannual-（4881KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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