CCAM reanalysis of ERA5

Dynamically downscaled ERA5 reanalysis data using the Conformal Cubic Atmospheric Model. Climate data is provided in 30 min intervals and at 12 km spatial resolution, starting from 1980 until present. Datasets were developed for application in the electricity sector, but can be used for other applications.

The Conformal Cubic Atmospheric Model (CCAM) is a regional climate model based on a variable resolution global grid used to dynamically downscale climate and weather data to higher resolutions. The CCAM-ERA5 data is climate and weather data downscaled from ERA-5 reanalyses (provided by ECMWF) to 12 km resolution over Australia and in 30 min time-steps. In addition to the standard climate variables, the model has also calculated additional information that may be useful for renewable energy generators, such as wind speed at 150m and 250m height above the surface or Direct Normal Irradiance for solar generators. Model data is currently provided in its raw form without bias correction and may need to be re-calibrated for certain applications.

CCAM is a dynamical model of the atmosphere designed for simulations of present and future climate. The model includes a comprehensive set of physical atmospheric processes consistent with most modern regional climate models. Since the model is based on a variable resolution global grid, the simulation does not rely on lateral boundary conditions. Instead the simulations employ a scale-selective filter that constrains the large-scale behavior to be consistent  with ERA-5, whereas finer scale features are simulated based on CCAM dynamical and physical parameterisations, as well as local information about terrain and vegetation. The simulation includes a representation of  aerosols including feedback for radiation and cloud micro-physics. CCAM also represents Australian cities and urban areas using a parameterisation tailored for Australian conditions called the Urban Climate and Energy Model  (UCLEM). Vegetation is represented using the Community Atmosphere Biosphere Land Exchange (CABLE) model developed in Australia.

The dataset is intended for studying the impact of climate related risks on Australian sectors such as Energy, Water and Agriculture. The dataset can be also combined with CCAM projections of climate change using the same model configuration. Additional details on the model are available at CCAM.

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