Numerical issues for coupling biological models with isopycnal mixing schemes

  title={Numerical issues for coupling biological models with isopycnal mixing schemes},
  author={Anand Gnanadesikan},
In regions of sloping isopycnals, isopycnal mixing acting in conjunction with biological cycling can produce patterns in the nutrient ®eld which have negative values of tracer in light water and unrealistically large values of tracer in dense water. Under certain circumstances, these patterns can start to grow unstably. This paper discusses why such behavior occurs. Using a simple four-box model, it demonstrates that the instability appears when the isopycnal slopes exceed the grid aspect ratio… CONTINUE READING


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