A high-resolution, 1-year, suite of 4D-Var Observing System Experiments of the East Australian Current System using the Regional Ocean Modeling System to study the impact of data from the Surface Water and Ocean Topography (SWOT) mission and Australia's Fishing Vessel Observation Network (FVON) on model state estimates

This data is output from the Regional Ocean Modeling System (ROMS) simulations that comprise a 4D-Var Observing System Experiments (OSEs) of the East Australian Current (EAC). The model has a horizontal resolution of 2.5-6 km in the cross shelf direction and 5 km in the along shelf direction, and 30 vertical s-levels. The model domain covers the southeastern Australia oceanic region from 25.1-41.5°S and 147.1-162.2°E, and the grid is orientated 20 degrees clockwise to be predominantly orientated alongshore. The OSEs cover a one-year period (1 Aug 2023 - 31 July 2024) and assimilate 'traditionally available' observation platforms alone, and these platforms in concert with SWOT data, FVON data, and both SWOT and FVON data. This zipped dataset contains model output, model forcing and configuration files and source code for the first 6-day assimilation cycle of the 'traditionally available' observations experiment (TRADshortTS). The ROMS output is in the form of netcdf files. The output files are the background and the analysis fields with daily averaged values. Each file contains the standard list of numerical output, including: zeta, ubar, vbar, u, v, w, temp, salt, shflux, ssflux, sustr, svstr, as well as grid information. All variables in the netcdf are described with metadata. Also included are the ROMS configuration files (header and in files) required for setting up the simulations using the open-source, publically available ROMS v4.2 source code. A zip-file of the ROMS source code is included which when combined with the forcing and configuration files, can re-run the experiments. Forcing and boundary files are included. The first cycle has been made available (to make the file size reasonable) but full datasets can be obtained by contacting the authors (and is archived on Australia's National Compute infrastructure).