Cenozoic climate, thermohaline circulation, and the marine carbon cycle

拟议项目的目的是调查大尺度海洋环流和海洋碳循环对新生代气候降温的作用。利用古海洋重建、数值海洋环流和生物地球化学模拟相结合的方法，我们建议研究大陆植被、岩石风化(与WP1合作)和海洋生物圈营养供应之间的联系，以此作为海洋生产力变化的潜在驱动因素，从而实现碳封存。我们研究的重点是由海洋沉积物中的地球化学指标记录的全球碳循环的变化，以及它们与海洋环流和生物地球化学的关系。模型结果将通过与WP2合作的海洋代理数据记录进行验证。此外，WP4模式将为WP3和WP5的数值模拟提供边界条件。在研究项目过程中，WP4中的模拟将通过实施WP1提供的大陆风化数据和使用WP5提供的最新大气边界条件来改进。

The aim of the proposed project is to investigate the role of the large-scale ocean circulation and the marine carbon cycle for Cenozoic climate cooling. Using a combined approach of paleoceanographic reconstruction and numerical ocean circulation and biogeochemical modeling, we propose to study the links between continental vegetation, rock weathering (in collaboration with WP1) and nutrient supply to the marine biosphere as a potential driver for changes in the ocean productivity and hence carbon sequestration. The focus of our study are the changes in the global carbon cycle, as recorded by geochemical proxies in marine sediments, and the understanding of their relation with ocean circulation and biogeochemistry. The model results will be validated with marine proxy data records in collaboration with WP2. Furthermore, WP4 models will provide boundary conditions for numerical modeling in WP3 and WP5. In the course of the research project, modeling in WP4 will be refined by implementing continental weathering data provided by WP1, and by using updated atmospheric boundary conditions provided by WP5.