阿拉伯海小暖池上混合层在季节-年际尺度上的动力和热力过程分析
文献类型：学位论文
| 作者 | ANJULA UMESH MARASINGHE MARASINGHE ARACHCHIGE |
| 答辩日期 | 2019 |
| 授予单位 | 南海海洋研究所 |
| 导师 | 王东晓 |
| 关键词 | 阿拉伯海小暖池，混合层年际变化的动力过程，混合层盐度/温度， 热盐收支， 气候模态指数 |
| 学位名称 | 硕士 |
| 学位专业 | 物理海洋学 |
| 其他题名 | Dynamics and thermodynamics of the upper mixed layer in the Arabian Sea mini warm pool on the seasonal and interannual time scales |
| 英文摘要 | Ocean Reanalysis System (ORAS4) implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF), has been used to study the seasonal and interannual variability of mixed layer dynamics and thermodynamics in the Arabian Sea Mini Warm Pool (ASMWP). The ORAS4 was validated with Argo and Aquarius in-situ/satellite observations for the period of 1999-2009. The ECMWF showed a way good correlation with these in-situ data.The Mixed layer of the ASMWP was studied under two major aspects: mixed layer temperature and mixed layer salinity. With the broad agreement this previous studies, this study conclude that time arival of low salinity water from the Bay of Bengal initiate the conditions to develop mini warm pool in th Southeast Arabian Sea area. Furthermore, there is about the two-month time gap between time arriving of low salinity and setting up mini warm pool in the Southeast Arabian Sea area. Salinity budget analysis reveals that horizontal advection mainly responsible for the salinity seasonality. But for the interannual variations freshwater flux play big role to create anomalies. ASMWP mixed layer temperature seasonality controled by mixed layer depth changes by the result of the low salinity advection from the Bay of Bengal. Moreover heat budget analysis displayed the important of the role of net heat flux to develop the mini warmpool. The mixed layer temperature interannual variabilties more or less controled my fluctuations of incoming radiations. Furthermore, the analysis shows that the intensity of the mixed layer salinity and the duration of the ASMWP high salinity period increases when negative Indian Ocean Dipole (nIOD) coincides with the La Nina condition.Interannual Mixed layer temperature dynamics showed a correlation with the ENSO and IOD signals, but it is not associated with every anomaly. Consequently, this study found there is no strong connection apparently between interannual mixed layer salinity anomalies and interannual mixed layer temperature anomalies in the ASMWP area. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18118]  |
| 专题 | 南海海洋研究所_学位论文（硕士） |
| 推荐引用方式 GB/T 7714 | ANJULA UMESH MARASINGHE MARASINGHE ARACHCHIGE. 阿拉伯海小暖池上混合层在季节-年际尺度上的动力和热力过程分析[D]. 南海海洋研究所. 2019. |
入库方式： OAI收割
来源：南海海洋研究所
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