IOCAS-IR  > 海洋环流与波动重点实验室
Quantifying the Contribution of Salinity Effect to the Seasonal Variability of the Makassar Strait Throughflow
Lu, Xi1,2,3; Hu, Shijian1,2,3; Guan, Cong1,2,3; Li, Mingting4; Sprintall, Janet5; Wang, Fan1,2,3
2023-11-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume50Issue:21Pages:9
Corresponding AuthorHu, Shijian(sjhu@qdio.ac.cn)
AbstractThe Makassar Strait throughflow (MST) constitutes a significant component of the Indonesian throughflow (ITF) and plays a pivotal role in the interbasin exchange between the Indian and Pacific Oceans. While previous studies have suggested that the buoyancy forcing plays a role in influencing the seasonality of the MST, the quantitative contribution of salinity effect on MST seasonality remains unclear. Here we use the measurements from the Monitoring ITF program and the Global Ocean Physics Reanalysis product to investigate the seasonality of MST and quantify the impact of the salinity effect. We find that the halosteric variability due to the salinity effect contributes to approximately (69.6 +/- 11.7) % of the total seasonal variability of surface dynamic height gradient along the Makassar Strait, and dominates the seasonality of the upper layer MST. The primary drivers for freshwater forcing are horizontal advection through the Karimata Strait and precipitation in the Java Sea. The Indonesian throughflow (ITF) connects the tropical Pacific and Indian Oceans, playing a big role in moving heat and freshwater between them. The Makassar Strait throughflow (MST), which is a major part of the ITF, is important for both regional and global climate systems. Previous studies suggest that the freshwater flux can affect the transport and vertical structure of MST throughout the year. In this study, we used current observations in the Makassar Strait and other high-resolution data to investigate how MST changes with each season, specifically focusing on how salinity changes affect it. The impact of salinity changes on the seasonal variations in MST overwhelms that of temperature changes. Most of the freshwater in the Makassar Strait comes from water flowing through the Karimata Strait, with some contribution from local rainfall in the Java Sea. The Makassar Strait throughflow (MST) shows significant seasonality associated with the along-strait sea surface height gradientHalosteric dynamic height (DH) dominates the seasonal variability of the sea surface DH gradient and MSTAdvection of freshwater from the Karimata Strait and local precipitation constitute the major freshwater forcing for the MST
DOI10.1029/2023GL105991
Indexed BySCI
Language英语
Funding ProjectThe Arlindo data () and the Makassar Strait data () are available online. The GLORYS data are downloaded from the CMEMS (). The AVISO data are available online (). The SMAP data are downloaded online (). The GPCP data can be found online (). This study is[LSKJ202202702] ; Interdisciplinary Innovation Team of Chinese Academy of Sciences[JCTD-2020-12] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42010403] ; National Natural Science Foundation of China[42022040] ; Shandong Provincial Natural Science Foundation[ZR2020JQ18] ; Youth Innovation Promotion Association of CAS[Y2022066]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:001089955400001
PublisherAMER GEOPHYSICAL UNION
WOS KeywordSOUTHERN INDIAN-OCEAN ; INDONESIAN THROUGHFLOW ; DECADAL VARIABILITY ; PACIFIC ; SEA ; EXCHANGE ; CURRENTS ; IMPACTS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/181565
Collection海洋环流与波动重点实验室
Corresponding AuthorHu, Shijian
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Laoshan Lab, Qingdao, Peoples R China
3.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao, Peoples R China
4.Sun Yat Sen Univ, Sch Marine Sci, Zhuhai, Peoples R China
5.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA USA
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lu, Xi,Hu, Shijian,Guan, Cong,et al. Quantifying the Contribution of Salinity Effect to the Seasonal Variability of the Makassar Strait Throughflow[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(21):9.
APA Lu, Xi,Hu, Shijian,Guan, Cong,Li, Mingting,Sprintall, Janet,&Wang, Fan.(2023).Quantifying the Contribution of Salinity Effect to the Seasonal Variability of the Makassar Strait Throughflow.GEOPHYSICAL RESEARCH LETTERS,50(21),9.
MLA Lu, Xi,et al."Quantifying the Contribution of Salinity Effect to the Seasonal Variability of the Makassar Strait Throughflow".GEOPHYSICAL RESEARCH LETTERS 50.21(2023):9.
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