Regional Applications

Bluelink Regional Modelling

Bluelink has provided for the development and deployment of two regional modelling systems: the Relocatable Ocean Atmosphere Model (ROAM).

Relocatable Ocean Atmosphere Model (ROAM)

The Relocatable Ocean and Atmospheric Model (ROAM) is a tactical tool, initially developed for the Royal Australian Navy, to improve prediction of sonar range in the ocean and radar in the atmosphere.


Screen shot of the ROAM user interface.

Using an intuitive and accessible user interface (Fig. 1), ROAM enables an operator to configure an ocean, atmospheric, and/or wave model for any region around Australia to produce a hindcast, over any time period, of a three to seven day forecast.


Comparison of observed (black) and modelled (red) sea-level off Fremantle during an extreme event.

An example of comparisons between observed and predicted sea-level off Fremantle is shown in Fig. 2 for an case when Fremantle experienced the highest sea-level on record. The model results presented were produced soon after the event. The results show that the automatically configured model reproduces the key features of the circulation, including an interesting resonance after the peak in sea-level.

ROAM accesses information from the Bluelink operational ocean forecast system – OceanMAPS – and the Bureau of Meteorology`s operational numerical weather prediction system to initialse and force each forecast.


Selected Publications

Goni G., A. Mavume, A. Mehra, C. Sampson C. Lauer E. Chassignet G. Halliwell, I-I Lin, I. Ginis J. Knaff, K. Kang, M. M. Ali, M. DeMaria, P. A. Sandery, R. Lumpkin, S. Ramos-Buarque, F. Marks, J. Price, 2009. Applications of satellite-derived ocean measurements to tropical cyclone intensity forecasting, Oceanography 22:3, 190-197.

Herzfeld, M. (2006) An alternative coordinate system for solving finite difference ocean models. Ocean Modelling, 14, 174 – 196.

Herzfeld, M., Waring J. R. (2008) SHOC: Sparse Hydrodynamic Ocean Code UserÕs manual. CSIRO internal document. 128 pp.

O`Kane, T.J., Oke, P.R. and Sandery P.A., 2011. Predicting the East Australian Current. Ocean Modelling, 38, 251-266.

Sandery P. A. and T. J. O`Kane, 2012. Coupled initialization in an ocean-atmosphere tropical cyclone prediction system. The Quarterly Journal of the Royal Meteorological Society, accepted.

Sandery P.A., G. B. Brassington and J. Freeman, 2011: Adaptive Nonlinear Dynamical Initialisation. Journal of Geophysical Research, 116, C01021 DOI:10.1029/2010JC006260.

Sandery P. A., G. B. Brassington, A. Craig and T. Pugh, 2010. Impacts of ocean-atmosphere coupling on tropical cyclone intensity change and ocean prediction in the Australian region, Monthly Weather Review. 138(6), 2074- 2091, DOI: 10.1175/2010MWR3101.1

Sandery P. A. and G. B. Brassington, 2008. Preliminary Evaluation of a Coupled Ocean-Atmosphere Prediction System. CAWCR Research Letters 1.

Sandery P. A. and G. B. Brassington, 2007. Upper ocean heat content in the Australian region and potential impacts on tropical cyclone intensification. BMRC Research Letters 8.

Walsh, K. E, P. A. Sandery, G. B. Brassington, B. Pak, M. Entel, C. Siegenthaler- LeDrian, J. Kepert and R. Darbyshire, 2009. Constraints on exchange coefficients in tropical cyclones at extreme wind speeds. Journal of Geophysical Research, 115 C09007, DOI:10.1029/2009JC005876.