印尼海强潮混合特征及其对印尼贯穿流的影响

流经印尼海的印尼贯穿流（ITF）是热带太平洋-印度洋物质能量交换的重要通道和全球大洋传送带的关键环节。已有研究表明，印尼海强潮混合是改变ITF水体性质的重要因素，直接影响ITF物质能量输运，从而影响全球大洋环流。由于现场观测匮乏，迄今对印尼海潮致混合特征的认识还存在较大分歧，如何在海洋模式中合理刻画印尼海强潮混合特征仍有待解决，潮致混合对ITF的影响过程和机制尚不清楚。基于此，本项目拟基于申请人研究团队在印尼海的混合现场观测，结合卫星遥感、超高分辨率潮波数值模拟，并开展补充观测，给出印尼海潮致混合的时空分布；利用申请人提出的基于调和分析的潮致混合参数化方案（HAT），发展能够合理再现印尼海潮致混合时空分布特征的参数化方案，建立印尼海高分辨率海洋环流数值模式，定量研究潮致混合对ITF的影响。预期成果将加深对ITF及其变异机制的理解，为提高海洋模式模拟ITF的能力提供有意义的参考。

The Indonesian seas play a fundamental role in the coupled ocean and climate system with the Indonesian Throughflow (ITF) providing the only tropical pathway for the so-called Great Ocean Conveyor Belt that connecting the global oceans. Existed studies suggest strong tidal mixing in the Indonesian Seas is the one of the dominating factors for the transformation of ITF waters, resulting in directly responses of mass and heat transport of the ITF. By joining in the Indian Ocean circulation system and the Agulhas Leakage, this effect is of capable to influence global oceans. However, owing to insufficient in situ measurements of mixing and incomplete expression of tidal mixing parametrization scheme, there is still neither consistent description for the distribution and variability of tidal mixing in the Indonesian, nor effective consideration of tidal mixing in ocean and climate models. Therefore, based on direct measurement of mixing in the Indonesian Seas (35 stations) conducted independently by our research group, supplemented by satellite observation and numerical model output, this proposed project plans to provide an overall description of the distribution and variation of tidal mixing in the Indonesian Seas. By employing a new parameterization scheme of tidal mixing (Harmonic Analyzed Parameterization of Tide-induced Mixing, HAT) developed by the applicant and his group, this proposed project also plans to set up a high-resolution regional ocean model with the HAT scheme involved, to assess the tidal mixing effect on the ITF. This project is supposed to improve our understanding of the variability of ITF and related dynamics. The product of this project, i.e., the tidal mixing dataset and HAT scheme, will also contribute to the improvement of ocean models in simulating the ITF.