IDSSE OpenIR  > 深海科学研究部  > 海洋环流观测与数值模拟研究室
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
2019-10-01
Source PublicationJOURNAL OF CLIMATE
ISSN0894-8755
Volume32Issue:19Pages:6403-6421
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.

KeywordIndian Ocean Advection Atmosphere-ocean Interaction Enso Ocean Circulation Thermocline
DOI10.1175/JCLI-D-19-0056.1
Indexed BySCI
Funding OrganizationKey Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; China Scholarship Council ; NOAA's Climate Program Office, Climate Variability and Predictability Program ; CSHOR
Language英语
Funding ProjectKey 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 KeywordBarrier-layer Thickness ; Sea-surface Salinity ; Mixed-layer ; Soil-moisture ; Pacific ; Dipole ; Scale ; Aquarius ; Impact ; Budget
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000484615400001
PublisherAMER METEOROLOGICAL SOC
Citation statistics
Document Type期刊论文
Version预印本
Identifierhttp://ir.idsse.ac.cn/handle/183446/6965
Collection深海科学研究部_海洋环流观测与数值模拟研究室
Corresponding AuthorFeng, Ming
Affiliation1.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
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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