Impacts of Mesoscale Processes on Biogeochemical Fluxes in the North Atlantic: Basin-Scale Eddy-Resolving Simulations

先前的模拟工作表明，随着分辨率从粗尺度（1.6‘）增加到涡解析度（0.1’），营养物输送通量发生了巨大变化。虽然粗分辨率模式表明对流和扩散的营养供应占主导地位，但高分辨率表明涡流引起的上升流很重要。为此，本研究拟在0.1’空间分辨率下运行一个五组分生物地球化学模型，以验证以下两个假设：(1)中尺度涡旋对上层海洋生态系统的主要影响是通过垂直输送过程提供无机营养物；(2)在光带以下，中尺度涡旋对生物地球化学循环的主要影响是溶解物质的水平输送。从这些模拟研究中获得的理解将用于指导中尺度生物地球化学过程参数化的发展，以便将其纳入全球海洋环流模式。

Prior modeling efforts have demonstrated a dramatic shift in nutrient transport fluxes as resolution was increased from coarse scales (1.6') to the eddy resolving case (0.1'). Whereas coarse resolution models suggest the dominance of convective and diffusive nutrient supply, higher resolutions showed that eddy-induced upwelling was important. For this reason, the principal investigator plans to run a five-component biogeochemical model at an eddy-resolving spatial resolution of 0.1' to test the following two hypotheses: (1) the primary impact of mesoscale eddies on upper ocean ecosystems is the supply of inorganic nutrients through vertical transport processes, and (2) below the euphotic zone, the primary influence of mesoscale eddies on biogeochemical cycling is horizontal transport of dissolved materials. Understanding gained from these modeling studies will be used to guide the development of parameterizations for mesoscale biogeochemical processes to permit their inclusion in global ocean circulation models.