海洋生产力的演化在相当程度上控制着全球碳循环，对全球气候变化影响深远。现代观测和冰期-间冰期时间尺度研究都表明风尘输入（关键是风尘铁和硅）能够极大地促进大洋古生产力的繁盛，但构造时间尺度风尘长期输入对大洋生产力演化的影响仍缺乏探讨。日本海是亚洲粉尘的重要沉积汇，是研究风尘输入及其生物地球化学效应的理想海域。本课题拟利用国际综合大洋钻探IODP346航次在日本海西南部U1430站位钻取的275米高质量长岩芯为研究材料，通过常微量元素、生物硅、有机碳-氮同位素和硅藻硅同位素分析，重建中新世以来日本海古沉积环境和古生产力演化历史，综合多种环境变化指标，揭示在构造时间尺度上，亚洲风尘物质长期输入对日本海古生产力演化的影响，建立日本海古生产力演化与东亚大陆构造演变及全球碳循环之间的联系，进而深入探讨全球气候变化的驱动机制。

The ocean productivity substantially controls the global carbon cycle, which has a far-reaching influence on the global climate. The modern observation and glacial-interglacial timescale research have shown that eolian dust input (especially eolian iron and silicon) could greatly promote the productivity in the ocean. However, the influence of long-term eolian dust input on the evolution of ocean productivity on tectonic time scale still needs investigation. The Japan Sea is one of the major sink of the Asian eolian dust, which is conducive to studying dust input and its biogeochemical effects. Based on the 275 m successive sediment core of high quality obtained from the Site U1430 in the southwestern Japan Sea in the IODP346 Expedition, this study plans to employ multiple geochemical analyses, including major and trace element, opal, organic carbon and nitrogen isotope and silicon isotope of diatoms, to reconstruct the redox condition and the primary productivity in the Japan Sea since the Miocene. Furthermore, combined with multi-environmental proxies, it aims to reveal the effects of long-term Asian eolian dust input on the ocean productivity, to construct the linkage between the paleoceanic productivity in the Japan Sea and the tectonic evolution of the East Asian continent and global carbon cycles, and then to explore the driving mechanism of global climate changes.