渤海海峡物质输送过程、通量和机制研究

Due to lack of in-situ time-series data, our understanding of sediment and energy flux through the Bohai Strait has so far been largely qualitative and limited to numerical modeling. Here we propose to collect high-frequency, high-resolution time-series data by deploying subsurface moorings and instrumented tripods at 4 locations across the Bohai Strait. The in-situ data of physical, sedimentary, and chemical parameters, spanning 4 months each for both summer and winter seasons, enable us to attack key issues in the study of material and energy flux through the Bohai Strait: (1) Quantification of sediment flux through the Strait and its impact on the biogeochemical processes in both Bohai and Yellow seas; (2) Quantification of bottom boundary layer dynamics in the Strait and the driving mechanisms of bedload and suspended-load sediment transport; (3) Providing critical data support for future numerical modeling aimed at reconstructing the Holocene transport, deposition, and redistribution patterns of Yellow River sediment. In addition, the proposed study would be the first in-situ observation involving the largest number of coordinated, simultaneously recording instruments. Its success would undoubtedly help advance China's science and technology development in the field of ocean observation.

渤海海峡是渤黄海物质交换的通道,其物质交换通量的变化长期以来受到地质 海洋学和物理海洋学的广泛关注,对区域生物地球化学循环过程也有重要意义。本申请拟在横跨渤海海峡的4个关键站位上，利用座底锚系和三脚架观测系统，实施高频率、高精度的 同步综合观测,获取长时间序列的水文、地质和化学参数,研究渤海海峡物质通量和沉 积物输运机制的若干重要科学问题。主要包括：［1］量化渤海海峡物质输运时空变化及其对渤、黄海生物地球化学过程的影响；［2］深入揭示海峡物质通道上底边界层动力学过程，定量地解释在不同水动力条件下沉积物的沉降、再悬浮、以及输运过程和驱动机制；［3］为将来以数值模拟研究全新世以来渤海海峡沉积物的搬运和堆积过程以及全球变化对渤海海峡物质通量变化的影响提供科学依据和数据支撑。本申请首次在渤海海峡系统开展底基三脚架与锚系的联合同步观测，对推动我国海底观测技术发展和科学研究具有重要意义。