The Role of Precipitation and Salinity Effect in Multidecadal Changes and Long-Terni Trend of the Indonesian Throughflow | |
Lu, Xi1,2,4; Hu, Shijian1,2,4; Sprintall, Janet3 | |
刊名 | JOURNAL OF CLIMATE |
2024-02-01 | |
卷号 | 37期号:4页码:1317-1331 |
关键词 | Salinity Multidecadal variability Precipitation |
ISSN号 | 0894-8755 |
DOI | 10.1175/JCLI-D-23-0248.1 |
通讯作者 | Hu, Shijian(sjhu@qdio.ac.cn) |
英文摘要 | 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. |
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关键词 | SOUTHERN INDIAN-OCEAN ; HEAT-CONTENT ; CHINA SEA ; PACIFIC ; VARIABILITY ; IMPACTS ; WATER ; CIRCULATION ; EXCHANGE ; CURRENTS |
WOS研究方向 | Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | AMER METEOROLOGICAL SOC |
WOS记录号 | WOS:001152450900001 |
内容类型 | 期刊论文 |
源URL | [http://ir.qdio.ac.cn/handle/337002/184356] |
专题 | 海洋研究所_海洋环流与波动重点实验室 |
通讯作者 | Hu, Shijian |
作者单位 | 1.Laoshan Lab, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA USA 4.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao, Peoples R China |
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. |
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