A sea surface salinity dipole mode in the tropical Indian Ocean
Zhang, Yuhong; Du, Yan; Qu, Tangdong; Du, Y (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China.
2016
发表期刊CLIMATE DYNAMICS
卷号47期号:2016-07-08页码:2573-2585
摘要Based on the 10 years sea surface salinity (SSS) data from Argo, we identified a salinity dipole mode in the tropical Indian Ocean, termed S-IOD: a pattern of interannual SSS variability with anomalously low-salinity in the central equatorial and high-salinity in the southeastern tropical Indian Ocean. The S-IOD matures in November-December, lagging the Indian Ocean dipole (IOD) mode derived from sea surface temperature (SST) by 2 months. For the period of observations, the S-IOD persists longer than the IOD, until the following September-October. Oscillations of the two S-IOD poles are governed by different processes. Ocean advection associated with equatorial current variability dominates the SSS anomalies of the northern pole, while surface freshwater flux variability plays a key role in the SSS anomalies of the southern pole, where anomalous precipitation is sustained by preformed sea surface temperature anomalies. The S-IOD concurs with the strong IOD, reflecting an ocean-atmosphere coupling through the SST-precipitation-SSS feedback.
部门归属[Zhang, Yuhong; Du, Yan] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China; [Qu, Tangdong] Univ Hawaii Manoa, SOEST, Int Pacific Res Ctr, Honolulu, HI 96822 USA; [Qu, Tangdong] Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA USA ; LTO
关键词S-iod Sst-precipitation-sss Feedback Tropical Indian Ocean Argo
学科领域Meteorology & Atmospheric Sciences
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15246
专题热带海洋环境国家重点实验室(LTO)
通讯作者Du, Y (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China.
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Zhang, Yuhong,Du, Yan,Qu, Tangdong,et al. A sea surface salinity dipole mode in the tropical Indian Ocean[J]. CLIMATE DYNAMICS,2016,47(2016-07-08):2573-2585.
APA Zhang, Yuhong,Du, Yan,Qu, Tangdong,&Du, Y .(2016).A sea surface salinity dipole mode in the tropical Indian Ocean.CLIMATE DYNAMICS,47(2016-07-08),2573-2585.
MLA Zhang, Yuhong,et al."A sea surface salinity dipole mode in the tropical Indian Ocean".CLIMATE DYNAMICS 47.2016-07-08(2016):2573-2585.
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