The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow

doi:10.1175/JCLI-D-23-0248.1

IOCAS-IR > 海洋环流与波动重点实验室

	The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow
	Lu, Xi1,2,3 ; Hu, Shijian 1,2,3; Sprintall, Janet 4
	2024-02-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	37 期号:4 页码:1317-1331
通讯作者	Hu, Shijian(sjhu@qdio.ac.cn)
摘要	Multidecadal variability of the Indonesian Throughflow (ITF) is crucial for the Indo-Pacific and global climate due to significant interbasin exchanges of heat and freshwater. Previous studies suggest that both wind and buoyancy forcing may drive ITF variability, but the role of precipitation and salinity effect in the variability of ITF on multidecadal time scales remains largely unexplored. Here, we investigate the multidecadal changes and long-term trend of the ITF transport during the past six decades, with a focus on the role of precipitation and salinity effect. The diverse datasets consistently indicate a substantial upward trend in the halosteric component of geostrophic transport of ITF in the outflow region at 1148E during the six decades. We find that the meridional differences of the salinity trend in the outflow region explain the increasing trend of the halosteric component of ITF transport. On a larger scale, the tropical western Pacific Ocean and Indonesian seas have experienced significant freshening, which has strengthened the Indo-Pacific pressure gradient and thus enhanced the ITF. In contrast, the equatorial trade wind in the western Pacific Ocean has weakened over recent decades, implying that changes in wind forcing have contributed to weakening the ITF. The combined effect of strengthened halosteric and weakened thermosteric components has resulted in a weak strengthening for the total ITF with large uncertainties. Although both the thermosteric and halosteric components are associated with natural climate modes, our results suggest that the importance of salinity effect is likely increasing given the enhanced water cycle under global warming.
关键词	Salinity Multidecadal variability Precipitation
DOI	10.1175/JCLI-D-23-0248.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42022040] ; Interdisciplinary Innovation Team of Chinese Academy of Sci- ences[JCTD-2020-12] ; Shandong Provincial Natural Science Foundation[ZR2020JQ18] ; Youth Innovation Promotion Association of CAS[Y2022066] ; U.S. National Science Foundation[1851316] ; Laoshan Laboratory[LSKJ202202702]
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001152450900001
出版者	AMER METEOROLOGICAL SOC
WOS关键词	SOUTHERN INDIAN-OCEAN ; HEAT-CONTENT ; CHINA SEA ; PACIFIC ; VARIABILITY ; IMPACTS ; WATER ; CIRCULATION ; EXCHANGE ; CURRENTS
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184357
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.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,Sprintall, Janet. The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow[J]. JOURNAL OF CLIMATE,2024,37(4):1317-1331.
APA	Lu, Xi,Hu, Shijian,&Sprintall, Janet.(2024).The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow.JOURNAL OF CLIMATE,37(4),1317-1331.
MLA	Lu, Xi,et al."The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow".JOURNAL OF CLIMATE 37.4(2024):1317-1331.