Collaborative Research: Transport Timescales, Pathways, and Carbon Uptake in the North Atlantic Ocean

该项目将采用一个新的框架来描述地球物理储藏中的平流-扩散输送到亚极涡旋中的拉布拉多海水输送。它将综合来自瞬变示踪剂、水文地理学和次表层OAT的资料，以估计：(I)北大西洋次极地LSW的时间平均输送时间和路径，重点是地转流、混合和再循环的平流作用；(Ii)控制LSW异常传播的过程；(Iii)亚极地北大西洋人为碳的吸收，以及地转流、混合和再循环平流在控制碳固定中的重要性。在非涡旋分辨率和涡旋分辨率下模拟1950-2000年北大西洋环流的一系列数值模式将被用来检验这些方法并估计数据分析的置信度。更广泛的影响将是更好地了解海洋环流和碳吸收，这是地球气候系统中具有重大社会意义的关键部分。研究结果将广泛传播给广大受众，并将该项目作为该项目在各个级别的教学中的特色。两名研究生和一名博士后将协助该项目，并接受物理海洋学和气候动力学方面的高级培训。

This project will apply a new framework to describe advective-diffusive transport in geophysical reservoirs to Labrador Sea Water (LSW) transport in the subpolar gyre. It will synthesize data from transient tracers, hydrography and subsurface ?oats to estimate: (i) the time-averaged transport timescales and pathways for LSW in the subpolar North Atlantic with a focus on the roles of advection by the geostrophic flow, mixing, and recirculation, (ii) the processes controlling propagation of LSW anomalies, and, (iii) the uptake of anthropogenic carbon in the subpolar North Atlantic, and the importance of advection by the geostrophic flow, mixing, and recirculation in controlling carbon sequestration. A range of numerical models that simulate 1950-2000 North Atlantic circulation at non-eddy-resolving and eddy-resolving resolutions will be used to test the methods and estimate confidence levels for the data analyses. The broader impacts will be better understanding of ocean circulation and carbon uptake, a critical part of Earth's climate system with great societal importance. The results will be disseminated to a wide audience and feature the project in all levels of the PI's teaching. Two graduate students and a post doc will assist the project and receive advanced training in physical oceanography and climate dynamics.