西太平洋典型地貌下深层边界环流与沉积输运

With abundant terrigenous material input, as well as well-developed seafloor hydrothermal activities, cold spring and submarine fissures, western Pacific becomes a key area for studying the cycle of material and energy at the interface between ocean and seabed as well as the ocean bottom boundary. Focused on the ocean dynamical environment and material transport at the interface between ocean and seabed, this project will employ long-term mooring observation and fine-scale multidiscipline profiles, including model simulations and theoretical analysis, to reveal the three dimensional structure of the deep western boundary current and bottom boundary current around the abrupt topography (e.g., Mariana Trench, Kyushu-Palau Ridge) in the Philippine Sea. By clarifying the upper questions, this project could support the interpretation of the impact of the material and energy cycle at the interface between ocean and seabed on the evolution of Lithosphere and also the abyssal circulation, and contribute to the realization of the program’s object.

西太平洋具有丰富的陆源物质输入、活跃的海底热液和冷泉活动、广泛的海底裂隙，是研究流固界面与海底边界层物质能量循环的关键区域。本项目拟围绕西太平洋流固界面动力环境及物质输运过程，聚焦菲律宾海及其周边海域的深层西边界、突变地形（马里亚纳海沟、九州帕劳海脊等）底边界的三维环流，以长期连续观测与精细化综合断面观测为主，结合数值模式与理论分析，揭示菲律宾海及周边海域深层西边界流与突变地形底边界水体垂向输运的三维时空分布特征及调控机理，建立该区域底层沉积物输运机制，支撑重大计划流固界面跨圈层物质能量交换对岩石圈演化和海洋深层环流等动力过程的影响等科学问题的解决。

西太平洋是研究流固界面与海底边界层物质能量循环的关键区域。围绕西太平洋流固界面动力环境及物质输运过程，聚焦菲律宾海及其周边海域的深层西边界、突变地形（马里亚纳海沟、九州帕劳海脊等）底边界的三维环流与沉积输运特征，构建了马里亚纳海沟-九州帕劳海脊-吕宋海峡深层边界环流与沉积同步观测阵列，并通过观测数据、样品分析和数值模式与理论分析相结合，揭示了菲律宾海深层环流边界环流的空间结构，揭示了突变地形底边界水体垂向输运的三维时空分布特征及调控机理，并围绕西太平洋沉积分布特征及输运方面的系列认知，形成了系列西太平洋典型地貌下深层边界环流与沉积输运的创新研究成果，顺利完成了项目目标，可实现对重大计划流固界面跨圈层物质能量交换对岩石圈演化和海洋深层环流等动力过程的影响等科学问题解决的有效支撑。