Decadal variability of sea surface salinity in the Southeastern Indian Ocean: Roles of local rainfall and the Indonesian throughflow

doi:10.3389/fmars.2022.1097634

IOCAS-IR > 海洋环流与波动重点实验室

	Decadal variability of sea surface salinity in the Southeastern Indian Ocean: Roles of local rainfall and the Indonesian throughflow
	Li, Jie1,2 ; Li, Yuanlong 2,3; Guo, Yaru 2; Li, Gang 1; Wang, Fan2,3
	2023-01-04
发表期刊	FRONTIERS IN MARINE SCIENCE
卷号	9 页码:18
通讯作者	Li, Yuanlong(liyuanlong@qdio.ac.cn)
摘要	The southeastern Indian Ocean (SEIO) exhibits prominent decadal variability in sea surface salinity (SSS), showing salinity decreases during 1995-2000 and 2005-2011 and increases during 2000-2005 and after 2011. These salinity changes are linked to the Indo-Pacific climate and have impacts on the regional marine environment. Yet, the underlying mechanism has not been firmly established. In this study, decadal SSS variability of the SEIO is successfully simulated by a high-resolution regional ocean model, and the mechanism is explored through a series of sensitivity experiments. The results suggest that freshwater transport of the Indonesian throughflow (ITF) and local precipitation are two major drivers for the SSS decadal variability. They mutually cause most of the variability, with a generally larger contribution of precipitation. Other processes, such as evaporation and advection driven by local winds, play a minor role. Further analysis shows that the decadal precipitation in the SEIO is mainly associated with the decadal variability of Ningaloo Nino. Ocean dynamic processes significantly modify the relationship between SSS and precipitation, greatly shortening their lag time. The changes in both volume transport and salinity of the ITF water can cause large salinity changes in the SEIO region. Although local wind forcing gives rise to considerable changes in evaporation rate and ocean current advection, its overall contribution to decadal SSS variability is small compared to local precipitation and the ITF.
关键词	sea surface salinity Southeast Indian Ocean decadal variability Indonesian throughflow rainfall
DOI	10.3389/fmars.2022.1097634
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000913338800001
出版者	FRONTIERS MEDIA SA
WOS关键词	LEEUWIN CURRENT ; LAYER SALINITY ; DIPOLE MODE ; INTENSIFICATION ; CIRCULATION ; PACIFIC ; EDDIES ; SST
引用统计	被引频次：1[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/337002/183309
专题	海洋环流与波动重点实验室
通讯作者	Li, Yuanlong
作者单位	1.Shandong Univ Sci & Technol, Coll Math & Syst Sci, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Laoshan Lab, Qingdao, Peoples R China
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	Li, Jie,Li, Yuanlong,Guo, Yaru,et al. Decadal variability of sea surface salinity in the Southeastern Indian Ocean: Roles of local rainfall and the Indonesian throughflow[J]. FRONTIERS IN MARINE SCIENCE,2023,9:18.
APA	Li, Jie,Li, Yuanlong,Guo, Yaru,Li, Gang,&Wang, Fan.(2023).Decadal variability of sea surface salinity in the Southeastern Indian Ocean: Roles of local rainfall and the Indonesian throughflow.FRONTIERS IN MARINE SCIENCE,9,18.
MLA	Li, Jie,et al."Decadal variability of sea surface salinity in the Southeastern Indian Ocean: Roles of local rainfall and the Indonesian throughflow".FRONTIERS IN MARINE SCIENCE 9(2023):18.