Evolution of Sea Surface Salinity Anomalies in the Southwestern Tropical Indian Ocean During 2010-2011 Influenced by a Negative IOD Event | |
Sun, Qiwei1,2; Du, Yan1,2; Zhang, Yuhong1; Feng, Ming3,4; Chowdary, Jasti S.5; Chi, Jianwei1,2; Qiu, Shuang1,2; Yu, Weidong6,7,8 | |
刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS |
2019-05 | |
卷号 | 124期号:5页码:3428-3445 |
关键词 | sea surface salinity Indian Ocean dipole southwestern tropical Indian Ocean horizontal advection Rossby waves |
ISSN号 | 2169-9275 |
DOI | 10.1029/2018JC014580 |
英文摘要 | Using Argo observations and Estimating the Circulation and Climate of the Ocean data sets, this study investigates the sea surface salinity (SSS) variability and its relationship with ocean dynamics in the southwestern tropical Indian Ocean (SWTIO) associated with the 2010 negative Indian Ocean dipole (IOD) event. The results show that the ocean circulation in the tropical southern Indian Ocean (IO) significantly contributes to the SSS anomalies during the evolution of the negative IOD event. The anomalous eastward current advected the high-salinity water into the eastern equatorial IO during July-October 2010. Then the positive SSS anomalies expanded southward to 6-8 degrees S due to the southeastward mean seasonal currents in the eastern equatorial IO during November-December 2010. A salinity budget analysis has been used to identify key processes in contributing to the SSS variations in the SWTIO. The decreased precipitation in the western and central equatorial IO leads to high SSS anomalies from January to April 2011. Then the anomalous southwestward currents transport the higher SSS water from the eastern equatorial IO to the SWTIO until May-June 2011. At the same time, the upwelling Rossby waves shoal the thermocline and mixed layer depth, bringing high-salinity subsurface water to the surface layer and cooling the sea surface temperature, which further depresses local precipitation to provide a positive feedback for the SSS increase. |
资助项目 | Open Project Program of State Key Laboratory of Tropical Oceanography[LTOZZ1701] |
WOS研究方向 | Oceanography |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000472819700026 |
内容类型 | 期刊论文 |
源URL | [http://ir.fio.com.cn:8080/handle/2SI8HI0U/27619] |
专题 | 自然资源部第一海洋研究所 |
通讯作者 | Du, Yan |
作者单位 | 1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.CSIRO Oceans & Atmosphere, Crawley, WA, Australia 4.Ctr Southern Hemisphere Oceans Res, Hobart, Tas, Australia 5.Indian Inst Trop Meteorol, Pune, Maharashtra, India 6.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Shandong, Peoples R China 7.State Ocean Adm, Inst Oceanog 1, Ctr Ocean & Climate Res, Qingdao, Shandong, Peoples R China 8.State Ocean Adm, Marine Environm Forecasting Ctr, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Qiwei,Du, Yan,Zhang, Yuhong,et al. Evolution of Sea Surface Salinity Anomalies in the Southwestern Tropical Indian Ocean During 2010-2011 Influenced by a Negative IOD Event[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2019,124(5):3428-3445. |
APA | Sun, Qiwei.,Du, Yan.,Zhang, Yuhong.,Feng, Ming.,Chowdary, Jasti S..,...&Yu, Weidong.(2019).Evolution of Sea Surface Salinity Anomalies in the Southwestern Tropical Indian Ocean During 2010-2011 Influenced by a Negative IOD Event.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,124(5),3428-3445. |
MLA | Sun, Qiwei,et al."Evolution of Sea Surface Salinity Anomalies in the Southwestern Tropical Indian Ocean During 2010-2011 Influenced by a Negative IOD Event".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 124.5(2019):3428-3445. |
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