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
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号121期号:4页码:2596-2615
文章类型Article
摘要The 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
收录类别SCI
语种英语
WOS记录号WOS:000383462300027
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/135777
专题海洋环流与波动重点实验室
作者单位1.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
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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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