![]() ![]() ![]() The black lines (b′b, c′, d′d, …, h′h) are the trajectories for the water masses at b′, c′, d′, …, h′ that will be entrained into the mixed layer in the following 1 year. The blue line (aa′) is the 1-yr Lagrangian trajectory based on the classical Lagrangian method from 16 Mar to 16 Mar of the previous year. In (b) and (d), 15 Feb is set as the time zero, and the 0.14 year represents the time since 15 Feb when the shallowest subducted water at station O, grid K′, detrained from the mixed layer of station K.Īn example for the sketch of the new 3D method in the Lagrangian framework for the annual obduction rate. (d) The potential density along the trajectories. (c) The horizontal locations of the quasi-1-yr trajectories, with the potential density of the subducted water labeled. ![]() (b) The depth evolution of the trajectories (arrows) and the mixed layer depth (red dashed line) along the trajectory AA′. (a) The three-dimensional trajectories, with the subducted sites and times for the water mass labeled. The black lines (BB′, CC′, DD′, …, KK′) are the trajectories for the subducted water which will reach station O at B′, C′, D′, …, K′ on 15 Feb of the next year. The blue line (AA′) is the 1-yr Lagrangian trajectory based on the classical Lagrangian method from 15 Feb to 15 Feb of the next year. An example for the three-dimensional structure of subduction obtained from the new 3D method in the Lagrangian framework. ![]()
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