Quantifying the Contribution of Salinity Effect to the Seasonal Variability of the Makassar Strait Throughflow

doi:10.1029/2023GL105991

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, Shijian 1,2,3; Guan, Cong1,2,3 ; Li, Mingting 4; Sprintall, Janet 5; Wang, Fan1,2,3
	2023-11-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	50 期号:21 页码:9
通讯作者	Hu, Shijian(sjhu@qdio.ac.cn)
摘要	The 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
DOI	10.1029/2023GL105991
收录类别	SCI
语种	英语
资助项目	The 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研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001089955400001
出版者	AMER GEOPHYSICAL UNION
WOS关键词	SOUTHERN INDIAN-OCEAN ; INDONESIAN THROUGHFLOW ; DECADAL VARIABILITY ; PACIFIC ; SEA ; EXCHANGE ; CURRENTS ; IMPACTS
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181565
专题	海洋环流与波动重点实验室
通讯作者	Hu, Shijian
作者单位	1.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
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 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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