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[AOS18-01] Subtropical seawater transport pathway of the North Pacific Transition Domain observed with drifting buoys
Keywords:the North Pacific Transition Domain, bottom topography, Sea Surface Temperature
To clarify the flow structure in the transition domain, we analyzed the data of drifting buoys observation in 2015 and modelled particles trajectory. The buoy trajectories and the modelled trajectories show that the main flow is northeastward flow with J1 and J2 (Isoguchi et al., 2006), bifurcation flow avoiding the low rise bottom topography around 42°N – 157°E. These results suggested that the flow structure in the transition domain is dominated by low rise bottom topography. We carried out drifting buoys observation in 2017. The new data also show the importance of low rise bottom topography. It is suggest that barotropic flow over the bottom topography contribute to the seawater transport paths in the North Pacific Transition Domain.