SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Evolution of Sea Surface Salinity Anomalies in the Southwestern Tropical Indian Ocean During 2010-2011 Influenced by a Negative IOD Event
Sun, Qiwei1; Du, Yan1; Zhang, Yuhong; Feng, Ming2,3; Chowdary, Jasti S.; Chi, Jianwei1; Qiu, Shuang1; Yu, Weidong5,6,7
2019
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume124Issue:5Pages:3428
AbstractUsing 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.
DepartmentLTO
Keywordsea surface salinity Indian Ocean dipole southwestern tropical Indian Ocean horizontal advection Rossby waves
DOI10.1029/2018JC014580
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17724
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.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.Chowdary, Jasti S.] 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
Recommended Citation
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.
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.
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