Satellite altimetry and thermometry are proven technologies for monitoring meso-scale ocean circulation off central WA but in the PIT region they are better suited to monitoring inter-annual anomalies on the larger scale. (The tandem mission and better de-aliasing may change this.)
Our newest global ocean model does surprisingly well reproducing observed currents off Darwin, but not Scott or Ashmore reefs. Finer resolution will increase the modelled flow through the Timor Sea.
The value of the global model is that it puts short (1yr) and localised (1000km) measurement programs into a longer-term, broader-scale context. Suggests tele-connections.
Steady progress is being made towards a synoptic ocean observing system. Global models with the resolution of earlier limited-area models are now possible - thereby solving the open boundary condition problem.
Much work remains, however, to constrain the models to follow reality. This is called data assimilation and is what GODAE is all about. It is what is required in order to make forecasts. The problem is that the computational requirements are many times those of non-assimilating models.
The ARGO program is potentially of enormous benefit to Australia but commitments of floats in our region are still meagre.

Thank you