A High-Resolution Ocean, Wave and Atmosphere Model of the Maritime Continent: Reanalysis and Prediction

Frank Colberg1, Gary B Brassington2, Saima Aijaz1, Pavel Sakov3, Stefan Zieger1, Gary Dietchmayer1, Wenming Lu1, Gregory L Roff1 and Zhian Sun1, (1)Bureau of Meteorology, Melbourne, VIC, Australia, (2)Bureau of Meteorology, Darlinghurst, NSW, Australia, (3)Bureau of Meteorology, Hobart, TAS, Australia
Abstract:
The Bureau of Meteorology has developed a high, on average 2km horizontal resolution, ocean, wave and atmospheric model of the maritime continent (MC). Both, the ocean and wave models are forced by a downscaled version of the Australian Community Climate and Earth-System Simulator (ACCESS). In addition, the ocean model ingests observations via an Ensemble Optimum Interpolation data assimilation system (EnOI). The data assimilation scheme includes ocean observations such as satellite altimetry, satellite sea surface temperature and ARGO profiles. The forecast system is run on a daily basis, providing 6 hourly forecasts of the physical state of the ocean and wave fields over the MC area.

In addition to the near real-time forecast system, a 3-year ocean reanalysis, spanning January 2016 to December 2018, has been developed. The reanalysis employed an EnOI data assimilation scheme. It is forced by hourly atmospheric fields produced by the Climate Forecast System Reanalysis (CFSR) and nested inside the Bluelink ReANalysis global ocean model (BRAN2015). This MC reanalysis provides daily averaged 3D ocean fields and hourly surface fields.

Here, we present settings and results from both the forecast and reanalysis systems. Their performances are assessed and challenges and future development plans are discussed

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