Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change

doi:10.1175/JCLI-D-21-0288.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change
	Lu, Ying 2,5; Li, Yuanlong 2,3,4; Duan, Jing 2,3; Lin, Pengfei 1; Wang, Fan 2,3,5
刊名	JOURNAL OF CLIMATE
	2022-03-01
卷号	35 期号:5 页码:1479-1496
关键词	Indian Ocean Sea level Salinity Multidecadal variability
ISSN号	0894-8755
DOI	10.1175/JCLI-D-21-0288.1
通讯作者	Li, Yuanlong(liyuanlong@qdio.ac.cn)
英文摘要	Regional sea level rise in the southeast Indian Ocean (SEIO) exerts growing threats to the surrounding Australian and Indonesian coasts, but the mechanisms of sea level rise have not been firmly established. By analyzing observational datasets and model results, this study investigates multidecadal steric sea level (SSL) rise of the SEIO since the mid-twentieth century, underscoring a significant role of ocean salinity change. The average SSL rising rate from 1960 through 2018 was 7.4 +/- 2.4 mm decade(-1), and contributions of the halosteric and thermosteric components were similar to 42% and similar to 58%, respectively. The notable salinity effect arises primarily from a persistent subsurface freshening trend at 400-1000 m. Further insights are gained through the decomposition of temperature and salinity changes into the heaving (vertical displacements of isopycnal surfaces) and spicing (density-compensated temperature and salinity change) modes. The subsurface freshening trend since 1960 is mainly attributed to the spicing mode, reflecting property modifications of the Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW) in the southern Indian Ocean. Also noteworthy is a dramatic acceleration of SSL rise (20.3 +/- 7.0 mm decade(-1)) since similar to 1990, which was predominantly induced by the thermosteric component (16.3 +/- 5.5 mm decade(-1)) associated with the heaving mode. Enhanced Ekman downwelling by surface winds and radiation forcing linked to global greenhouse gas warming mutually caused the depression of isopycnal surfaces, leading to the accelerated SSL rise through thermosteric effect. This study highlights the complexity of regional sea level rise in a rapidly changing climate, in which the role of ocean salinity is vital and time-varying.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Natural Science Foundation of China (NSFC)[41806001] ; National Natural Science Foundation of China (NSFC)[41976026] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; National Key R&D Program of China[2019YFA0606702] ; Key Deployment Project of CAS Centre for Ocean MegaScience[COMS2019Q07]
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000799197000006
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179329]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Li, Yuanlong
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Oceanol & Ctr Ocean Megasci, Key Lab Ocean Circulat & Waves, CAS, Qingdao, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 5.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lu, Ying,Li, Yuanlong,Duan, Jing,et al. Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change[J]. JOURNAL OF CLIMATE,2022,35(5):1479-1496.
APA	Lu, Ying,Li, Yuanlong,Duan, Jing,Lin, Pengfei,&Wang, Fan.(2022).Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change.JOURNAL OF CLIMATE,35(5),1479-1496.
MLA	Lu, Ying,et al."Multidecadal Sea Level Rise in the Southeast Indian Ocean: The Role of Ocean Salinity Change".JOURNAL OF CLIMATE 35.5(2022):1479-1496.