斯里兰卡穹顶区的形成和演变机制分析
文献类型：学位论文
| 作者 | K BASNAYAKA SUBASINHAGE SRI JANARANJANA EKANAYAKA |
| 答辩日期 | 2019 |
| 授予单位 | 南海海洋研究所 |
| 导师 | 王卫强 |
| 关键词 | 斯里兰卡穹顶区，风应力旋度，Ekman抽吸，孟加拉湾穹顶区 |
| 学位名称 | 硕士 |
| 学位专业 | 物理海洋学 |
| 其他题名 | Mechanisms of the Sri Lanka Dome and its evolutionary aspects |
| 英文摘要 | This study focuses on the generation, migration and dissipation mechanisms of the Sri Lanka Dome (SLD) and its connection with Bay of Bengal Dome (BBD) using Simple Ocean Data Assimilation reanalysis data and AVISO data. The SLD is a cyclonic ocean eddy in the southwest Bay of Bengal, which exist during May through September concurring with the intrusion of southwest monsoon current into the Bay of Bengal. The results show that, Ekman pumping due to positive wind stress curl east off coast of Sri Lanka is the guiding mechanism of the SLD formation and migration during developing stage. Besides, an upwelling Rossby waves propagation positively contribute to the SLD developing as well. Further, diminishing of positive wind stress curl and the eastern boundary reflected downwelling Rossby wave impact are crucial factors for dissipation of SLD. During the dissipating stage of SLD, the Bay of Bengal Dome (BBD) forms separately owing to the Ekman Pumping driven by local positive wind curl. The regression analysis convinces that the local wind stress curl has a strong positive relationship with upwelling within the BBD. After September, weak positive wind stress curl prevails in the southwest BOB, the BBD starts to blend with the SLD. There are two kinds of interactions between SLD and BBD. The first one is a dynamic interaction explained by eddy kinetic energy analysis and the second is a thermodynamic interaction revealed by merging of subsurface cold eddy cores of the SLD and the BBD. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18120]  |
| 专题 | 南海海洋研究所_学位论文（硕士） |
| 推荐引用方式 GB/T 7714 | K BASNAYAKA SUBASINHAGE SRI JANARANJANA EKANAYAKA. 斯里兰卡穹顶区的形成和演变机制分析[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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