Subtropical sea surface salinity maxima in the South Indian Ocean
文献类型：CNKI期刊论文
| 作者 | WANG Yu; LI Yuanlong; WEI Chuanjie |
| 发表日期 | 2020-01-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | sea surface salinity(SSS) subtropical salinity maximum Aquarius Argo ?oat freshwater ?ux |
| 英文摘要 | Subtropical sea surface salinity(SSS) maximum is formed in the subtropical South Indian Ocean(SIO) by excessive evaporation over precipitation and serves as the primary salt source of the SIO. Spaceborne SSS measurements by Aquarius satellite during September 2011–May 2015 detect three disconnected SSS maximum regions(>35.6) in the eastern(105°E–115°E, 38°S–28°S), central(60°E–100°E, 35°S–25°S), and western(25°E–40°E, 38°S–20°S) parts of the subtropical SIO, respectively. Such structure is however not seen in gridded Argo data. Analysis of Argo pro?le data con?rms the existence of the eastern maximum patch and also reveals SSS overestimations of Aquarius near the western and eastern boundaries. Although subjected to large uncertainties, a mixed-layer budget analysis is employed to explain the seasonal cycle of SSS. The eastern and central regions reach the highest salinity in February–March and lowest salinity in August–September, which can be well explained by surface freshwater forcing(SFF) term. SFF is however not controlled by evaporation( E) or precipitation( P). Instead, the large seasonal undulations of mixed layer depth(MLD) is the key factor. The shallow(deep) MLD in austral summer(winter) ampli?es(attenuates) the forcing ef fect of local positive E-P and causes SSS rising(decreasing). Ocean dynamics also play a role. Particularly, activity of mesoscale eddies is a critical factor regulating SSS variability in the eastern and western regions. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China(Nos.41776001,41806001) ; the National Key R&D Program of China(No.2016YFC0301103) |
| 卷 | v.38期:01页:18-31 |
| 语种 | 英文; |
| 分类号 | P731.12 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188344]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.NorthChinaSeaOffshoreEngineeringSurveyInstitute,NorthChinaSeaBranchofMinistryofNaturalResources 3.CenterforOceanMega-Science,ChineseAcademyofSciences 4.EngineeringandTechnologyDepartment,InstituteofOceanology,ChineseAcademyofSciences 5.UniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | WANG Yu,LI Yuanlong,WEI Chuanjie. Subtropical sea surface salinity maxima in the South Indian Ocean. 2020. |
入库方式： OAI收割
来源：海洋研究所
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