卫星海洋环境动力学国家重点实验室为增进学术交流，促进实验室对外开放，组织系列“海星系列学术讲座”，邀请国内外知名专家与青年科研人员分享前沿科学动态，讨论最新学术成果，欢迎大家踊跃参加。

召集人：谢晓辉 研究员

会议时间：2月17日（周一）10:00-11:30

会议地点：1号楼610会议室

报告人：杨鲁薇 博士（澳大利亚国立大学博士后研究员）

报告题目：Finding missing tidal energy dissipation in the open ocean

报告人简介：杨鲁薇博士，2019年于塔斯马尼亚大学获物理海洋学博士学位，2020年至2023年在加州大学洛杉矶分校从事博士后研究，2023年起任澳大利亚国立大学博士后研究员。研究聚焦于气候变化背景下小尺度动力过程对全球海洋的影响，领域涵盖海洋内波动力学、波涡相互作用及其对大尺度海洋环流的影响。研究成果包括开发并应用创新的地形波参数化方案，评估地形波对南大洋环流的影响；揭示涡旋在内波连续谱形成中的关键作用等。已在《Communications Earth & Environment》《Journal of Physical Oceanography》《Geophysical Research Letters》等国际学术期刊发表论文6篇，并多次在国际学术会议上报告研究成果。

报告背景：Barotropic tides are dissipated at a global rate of 3.7 TW (1 TW = 1012 W), with approximately 70% occurring in shallow seas near the coast and the remaining 30% (~ 1 TW) in the open ocean. Tidal energy dissipation in the open ocean accounts for about half of the energy that powers turbulent mixing, which plays a crucial role in transporting heat, carbon and other tracers between the surface and deep ocean. Global ocean models with astronomical tidal forcing aim to simulate barotropic tides by minimising the global area-weighted root mean square error (RMSE) in tidal elevation while reproducing the dissipation partition. In these models, tidal energy is dissipated through unresolved tide-topography interactions, including bottom friction in shallow seas and the generation of internal tides in the open ocean. Open ocean dissipation is often represented by a wave drag associated with the generation of internal tides. To reproduce the observed dissipation partition, the wave drag coefficient is typically scaled by a factor greater than 1, indicating that the generation of internal tides alone cannot account for all tidal energy dissipation in the open ocean. In this study, we implement a novel wave drag parameterization in MOM6 and run a global barotropic M2-tide-only model to investigate the missing processes contributing to tidal energy dissipation in the open ocean. Specifically, we test the hypothesis that tidal energy is also dissipated through nonlinear processes in the open ocean.