The CSIRO archive of the 2007 Sydney Health or Sydney Water Project Regional Climate Model dataset for the Australasia region for the years 1961-2100. Created with the CSIRO Cubic Conformal Atmospheric Model (CCAM) Regional Climate Model (RCM) by dynamically downscaling the CSIRO Mk3.0 A2 M20th Global Climate Model output over a target area centered on the Australasia region. This dataset was also supplied to the Air Pollution Group as part of a study examining the possible health problems associated with the future environmental air quality conditions. The CCAM model was nested in the CSIRO Mk3.0 Global Climate model (GCM) host for the A2 scenario with the M20th scenario as greenhouse emissions corresponding to 1961-2000. 4X-Daily, Monthly mean and seasonal atmospheric variables are available between Lat: 15, -50 & Lon: 70, 200 at 6 levels (1000, 850, 700, 500, 300, 200 hPa) with .5º (60km) resolution. There are 1687 daily files totalling 2.39 TB, and 3122 monthly_mean & seasonal files totaling 94.3 GB. All files are in netcdf format and are available for internal use and analysis by CSIRO staff on the HPSC cherax.