Abstract
A basin-wide ocean general circulation model with open boundaries is used to study the uptake and distribution of CFCs in the North Pacific. The air-sea flux and distribution of CFC-11 are computed. Based on the simulation the influences of different isopycnal diffusion coefficients and open boundaries on the distribution of CFC-11 are examined. Opening the south boundary of the model can improve the simulation of CFC-11 in the area south of the equator dramatically. Increasing the isopycnal diffusivity can make the water with high CFC-11 concentration at 137°E and 165°E have stronger transports southward and downward so to cover a larger area. The simulated distribution of CFC-11 can be improved greatly with the increasing isopycnal diffusivity in the western North Pacific. The west North Pacific is an important sink of CFC-11 and the eastern equator is also a sink.
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