Abstract

The ocean margins play a disproportionally important role on air-sea CO₂ fluxes and global carbon budget. The level of bio-limiting nutrients in the upper ocean constrains the primary productivity and export production, subsequently determining ocean capability of sequestering atmospheric CO₂. Ocean margins are thus intrinsically characterized by higher gradients of variations in almost all chemical and biological parameters and stronger variability in time. These factors increase the complexities and difficulties of the biogeochemical studies in ocean margins. The South China Sea (SCS), the largest marginal sea of the North Pacific, is such a complex system. Based on multiple approaches, including field observations, historical data reanalyzing and a three-dimensional coupled physical-biogeochemical model, I will present the spatial and seasonal variations of carbon and nutrients and their controlling mechanisms, and the subsequent biogeochemical implications in the SCS.

Bio：

杜川军博士2016年7月毕业于厦门大学环境与生态学院，2016年11月至2017年11月在香港科技大学从事博士后研究；2018年6月起至今在MEL从事博士后研究工作，合作导师为戴民汉教授。杜川军博士的主要研究内容为南海碳和营养盐的生物地球化学过程，包括时空变化、动力调控机制、以及生物地球化学意义。