IOCAS-IR  > 海洋环流与波动重点实验室
Interannual variability of the Indonesian Throughflow: The salinity effect
Hu, Shijian1,2,3; Sprintall, Janet2
2016-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
Volume121Issue:4Pages:2596-2615
SubtypeArticle
AbstractThe Indonesian Throughflow (ITF) region possesses strong mixing and experiences significant freshwater input, but the role of salinity variability in the Indonesian Seas remains unclear. The goal of this study is to understand how salinity variability influences the ITF transport on interannual time scales. The ITF transport is calculated using observations and assimilation data sets and verified using direct ITF transport estimates. We find that the halosteric component of the ITF transport contributes (36 +/- 7)% of the total ITF variability, in contrast to (63 +/- 6)% by the thermosteric component. Thus, while not dominant, this result nonetheless implies that the salinity variability in the Indonesian Seas is of remarkable importance in determining the interannual variability of ITF transport. Correlation analysis indicates that the interannual variability of the total ITF transport is mainly influenced by the El Nino-Southern Oscillation (ENSO) rather than the Indian Ocean Dipole. Under the ENSO cycle, the Walker Circulation shifts longitudinally resulting in fluctuations in precipitation over the Indonesian Seas that modulates salinity and subsequently influences the interannual variability of ITF transport. This result signals the importance of precipitation and the subsequent salinity effect in determining the interannual variability of the ITF transport. The role of wind forcing and oceanic planetary waves is also revisited using this newly calculated ITF transport series. ENSO-related wind forcing is found to modulate the ITF transport via Rossby waves through the wave guide in the Indonesian Seas, which is in agreement with previous studies.
DOI10.1002/2015JC011495
Indexed BySCI
Language英语
WOS IDWOS:000383462300027
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/135777
Collection海洋环流与波动重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave, Qingdao, Peoples R China
2.Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103 USA
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Hu, Shijian,Sprintall, Janet. Interannual variability of the Indonesian Throughflow: The salinity effect[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2016,121(4):2596-2615.
APA Hu, Shijian,&Sprintall, Janet.(2016).Interannual variability of the Indonesian Throughflow: The salinity effect.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,121(4),2596-2615.
MLA Hu, Shijian,et al."Interannual variability of the Indonesian Throughflow: The salinity effect".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 121.4(2016):2596-2615.
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